Monthly Archives: July 2015

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NASA News Digest: Space Science For 17 July – 24 July 2015

Greetings fellow astrophiles,

The NASA News service provides up-to-date announcements of NASA policy, news events, and space science. A recent selection of space science articles are provided below, including direct links to the full announcements. Those interested in receiving these news announcements directly from NASA can subscribe to their service by sending an email to:

hqnews-request@newsletters.nasa.gov?subject=subscribe

NASA’s New Horizons Discovers Frozen Plains In The Heart Of Pluto’s ‘Heart’

RELEASE 15-154 (Click here for the full article) – 17 July 2015

2015july27_pluto_heart_of_the_heart_03In the latest data from NASA’s New Horizons spacecraft, a new close-up image of Pluto reveals a vast, craterless plain that appears to be no more than 100 million years old, and is possibly still being shaped by geologic processes. This frozen region is north of Pluto’s icy mountains, in the center-left of the heart feature, informally named “Tombaugh Regio” (Tombaugh Region) after Clyde Tombaugh, who discovered Pluto in 1930.

“This terrain is not easy to explain,” said Jeff Moore, leader of the New Horizons Geology, Geophysics and Imaging Team (GGI) at NASA’s Ames Research Center in Moffett Field, California. “The discovery of vast, craterless, very young plains on Pluto exceeds all pre-flyby expectations.”

This fascinating icy plains region — resembling frozen mud cracks on Earth — has been informally named “Sputnik Planum” (Sputnik Plain) after the Earth’s first artificial satellite. It has a broken surface of irregularly-shaped segments, roughly 12 miles (20 kilometers) across, bordered by what appear to be shallow troughs. Some of these troughs have darker material within them, while others are traced by clumps of hills that appear to rise above the surrounding terrain. Elsewhere, the surface appears to be etched by fields of small pits that may have formed by a process called sublimation, in which ice turns directly from solid to gas, just as dry ice does on Earth.

Follow the New Horizons mission on Twitter and use the hashtag #PlutoFlyby to join the conversation. Live updates are also available on the mission Facebook page.

For more information on the New Horizons mission, including fact sheets, schedules, video and new images, visit: www.nasa.gov/newhorizons and solarsystem.nasa.gov/planets/plutotoolkit.cfm

NASA Satellite Camera Provides “EPIC” View Of Earth

RELEASE 15-151 (Click here for the full article) – 20 July 2015

2015july27_187_1003705_americas_dxmA NASA camera on the Deep Space Climate Observatory (DSCOVR) satellite has returned its first view of the entire sunlit side of Earth from one million miles away.

The color images of Earth from NASA’s Earth Polychromatic Imaging Camera (EPIC) are generated by combining three separate images to create a photographic-quality image. The camera takes a series of 10 images using different narrowband filters — from ultraviolet to near infrared — to produce a variety of science products. The red, green and blue channel images are used in these Earth images.

“This first DSCOVR image of our planet demonstrates the unique and important benefits of Earth observation from space,” said NASA Administrator Charlie Bolden. “As a former astronaut who’s been privileged to view the Earth from orbit, I want everyone to be able to see and appreciate our planet as an integrated, interacting system. DSCOVR’s observations of Earth, as well as its measurements and early warnings of space weather events caused by the sun, will help every person to monitor the ever-changing Earth, and to understand how our planet fits into its neighborhood in the solar system.”

For more information about NASA’s Earth science activities, visit: www.nasa.gov/earth

For more information about DSCOVR, visit: www.nesdis.noaa.gov/DSCOVR/

NASA’s Kepler Mission Discovers Bigger, Older Cousin To Earth

RELEASE 15-156 (Click here for the full article) – 23 July 2015

2015july27_452b_system_comparisonNASA’s Kepler mission has confirmed the first near-Earth-size planet in the “habitable zone” around a sun-like star. This discovery and the introduction of 11 other new small habitable zone candidate planets mark another milestone in the journey to finding another “Earth.”

The newly discovered Kepler-452b is the smallest planet to date discovered orbiting in the habitable zone — the area around a star where liquid water could pool on the surface of an orbiting planet — of a G2-type star, like our sun. The confirmation of Kepler-452b brings the total number of confirmed planets to 1,030.

“On the 20th anniversary year of the discovery that proved other suns host planets, the Kepler exoplanet explorer has discovered a planet and star which most closely resemble the Earth and our Sun,” said John Grunsfeld, associate administrator of NASA’s Science Mission Directorate at the agency’s headquarters in Washington. “This exciting result brings us one step closer to finding an Earth 2.0.”Kepler-452b is 60 percent larger in diameter than Earth and is considered a super-Earth-size planet. While its mass and composition are not yet determined, previous research suggests that planets the size of Kepler-452b have a good chance of being rocky.

For more information about the Kepler mission, visit: www.nasa.gov/kepler

A related feature story about other potentially habitable planets is online at: www.nasa.gov/jpl/finding-another-earth

NASA’s New Horizons Team Finds Haze, Flowing Ice On Pluto

RELEASE 15-158 (Click here for the full article) – 24 July 2015

2015july27_nh_01_stern_05_pluto_hazenewFlowing ice and a surprising extended haze are among the newest discoveries from NASA’s New Horizons mission, which reveal distant Pluto to be an icy world of wonders.

“We knew that a mission to Pluto would bring some surprises, and now — 10 days after closest approach — we can say that our expectation has been more than surpassed,” said John Grunsfeld, NASA’s associate administrator for the Science Mission Directorate. “With flowing ices, exotic surface chemistry, mountain ranges, and vast haze, Pluto is showing a diversity of planetary geology that is truly thrilling.”

Just seven hours after closest approach, New Horizons aimed its Long Range Reconnaissance Imager (LORRI) back at Pluto, capturing sunlight streaming through the atmosphere and revealing hazes as high as 80 miles (130 kilometers) above Pluto’s surface. A preliminary analysis of the image shows two distinct layers of haze — one about 50 miles (80 kilometers) above the surface and the other at an altitude of about 30 miles (50 kilometers).

“My jaw was on the ground when I saw this first image of an alien atmosphere in the Kuiper Belt,” said Alan Stern, principal investigator for New Horizons at the Southwest Research Institute (SwRI) in Boulder, Colorado. “It reminds us that exploration brings us more than just incredible discoveries — it brings incredible beauty.”

View a simulated flyover using New Horizons’ close-approach images of Sputnik Planum and Pluto’s newly-discovered mountain range, informally named Hillary Montes, in the video below: go.nasa.gov/1MMEdTb

For more information on the New Horizons mission, including fact sheets, schedules, video and images, visit: www.nasa.gov/newhorizons

Free Astronomy Magazine – July-August 2015 Issue Available For Reading And Download

Greetings, fellow astrophiles!

2015july18_freeastro_coverThe most recent issue of Free Astronomy Magazine (July-August, 2015) is available for your reading and downloading pleasure at www.astropublishing.com (click the link to go directly to the issue).

Free Astronomy Magazine was featured as the first of a (to be) series of articles on great free online content for amateur astronomers (see A Universe Of Free Resources Part 1) and the May-June issue announcement was also posted recently on the CNYO website.

The content, as usual, is varied and well-presented. From our own backyard (Dawn @ Ceres), out to the neighbor’s place (51 Pegasi B), to all the way into the next town (the gigantic halo discovered around the Andromeda Galaxy), the issue is full of great, highly informative articles (the same kinds of informative and science-filled articles you’d expect from… more expensive providers).

You can find previous Free Astronomy Magazine issues by checking out our Free Astronomy Magazine Category (or look under the Education link in our menu).

For those wanting a quick look at what this issue has to offer, the Table of Contents is reproduced below.

July-August 2015

The web browser-readable version of the magazine can be found here:

www.astropublishing.com/FreeAstronomyMagazine_JulAug2015/index.html

For those who want to jump right to the PDF download (50 MB), Click HERE.

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Maine Astronomy Retreat – Email Announcement And Update From The Organizers

Greetings, fellow astrophiles!

The following email came across the internets yesterday announcing updates to the Maine Astronomy Retreat, yet another excellent Star Party placed reasonably close to Central New York. For those interested, check out the email and embedded links for more information.

We are reaching out to inform you of an update about the Maine Astronomy Retreat at Medomak Retreat Center in Washington, Maine – a vacation for you and your telescope!

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We are pleased to announce that Babak A. Tafreshi has been added to our team of instructors. Tafreshi is the founder of The World at Night or TWAN program and a photographer for the National Geographic image collection, specialized in nightscape imaging, connecting the Earth and sky, bridging art and science. He is also a science journalist and astronomy communicator. He is a board member of Astronomers without Borders and a contributing photographer for Sky & Telescope. You can explore his photography in the links listed below:

* Personal website: http://dreamview.net
* The World at Night: http://twanight.org/tafreshi
* National Geographic: http://natgeocreative.com/photography/tafreshi
* Timelapse Motions: https://vimeo.com/btafreshi/videos

We would love if you would pass on this information to your group members or include it in your newsletter and calendar of events.

Please see our website, http://www.astronomyretreat.com, for more details, and to register. If you have any questions, please feel free to give us a call at 1-866-MEDOMAK.

Thank you so much for your time and consideration.

David Brunner
Director, Medomak
Summer Camp for Families & Retreat Center for Adults
www.medomakcamp.com
www.medomakretreatcenter.com

NASA Space Place – On The Brightness Of Venus

Poster’s Note: One of the many under-appreciated aspects of NASA is the extent to which it publishes quality science content for children and Ph.D.’s alike. NASA Space Place has been providing general audience articles for quite some time that are freely available for download and republishing. Your tax dollars help promote science! The following article was provided for reprinting in July, 2015.

By Dr. Ethan Siegel

2013february2_spaceplaceThroughout the past few months, Venus and Jupiter have been consistently the brightest two objects visible in the night sky (besides the moon) appearing in the west shortly after sunset. Jupiter is the largest and most massive planet in the solar system, yet Venus is the planet that comes closest to our world. On June 30th, Venus and Jupiter made their closest approach to one another as seen from Earth—a conjunction—coming within just 0.4° of one another, making this the closest conjunction of these two worlds in over 2,000 years.

And yet throughout all this time, and especially notable near its closest approach, Venus far outshines Jupiter by 2.7 astronomical magnitudes, or a factor of 12 in apparent brightness. You might initially think that Venus’s proximity to Earth would explain this, as a cursory check would seem to show. On June 30th Venus was 0.5 astronomical units (AU) away from Earth, while Jupiter was six AU away. This appears to be exactly the factor of 12 that you need.

Only this doesn’t explain things at all! Brightness falls off as the inverse square of the distance, meaning that if all things were equal, Venus ought to seem not 12 but 144 times brighter than Jupiter. There are three factors in play that set things back on the right path: size, albedo, and illumination. Jupiter is 11.6 times the diameter of Venus, meaning that despite the great difference in distance, the two worlds spanned almost exactly the same angular diameter in the sky on the date of the conjunction. Moreover, while Venus is covered in thick, sulfuric acid clouds, Jupiter is a reflective, cloudy world, too. All told, Venus possesses only a somewhat greater visual geometric albedo (or amount of reflected visible light) than Jupiter: 67 percent and 52 percent, respectively. Finally, while Venus and Jupiter both reflect sunlight toward Earth, Jupiter is always in the full (or almost full) phase, while Venus (on June 30th) appeared as a thick crescent.

All told, it’s a combination of these four factors—distance, size, albedo, and the phase-determined illuminated area—that determine how bright a planet appears to us, and all four need to be taken into account to explain our observations.

Don’t fret if you missed the Venus-Jupiter conjunction; three more big, bright, close ones are coming up later this year in the eastern pre-dawn sky: Mars-Jupiter on October 17, Venus-Jupiter on October 26, and Venus-Mars on November 3.

Keep watching the skies, and enjoy the spectacular dance of the planets!

2015july16_2015_07_Venus

Caption: Image credit: E. Siegel, using the free software Stellarium (L); Wikimedia Commons user TimothyBoocock, under a c.c.-share alike 3.0 license (R). The June 30th conjunction (L) saw Venus and Jupiter pass within 0.4° of one another, yet Venus always appears much brighter (R), as it did in this image from an earlier conjunction.

About NASA Space Place

The goal of the NASA Space Place is “to inform, inspire, and involve children in the excitement of science, technology, and space exploration.” More information is available at their website: http://spaceplace.nasa.gov/

The Pluto Edition! NASA News Digest: Space Science For 1 July – 15 July 2015

Greetings fellow astrophiles,

Poster’s Note: While Tuesday, July 14th marked a momentous occasion in the history of Solar System exploration with the flyby of Pluto and its moon by New Horizons, July 15th marked the release of the first of the closest-approach images to the general public, which some of us think is much more fun! To mark the occasion on the CNYO website, this NASA News Digest contains the four most recent New Horizons updates, finishing with the first of what will be a large number of amazing images from our nearest-farthest neighbor.

The NASA News service provides up-to-date announcements of NASA policy, news events, and space science. A recent selection of space science articles are provided below, including direct links to the full announcements. Those interested in receiving these news announcements directly from NASA can subscribe to their service by sending an email to:

hqnews-request@newsletters.nasa.gov?subject=subscribe

NASA’s New Horizons Spacecraft Stays the Course to Pluto

RELEASE 15-143 (Click here for the full article) – 1 July 2015

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NASA’s New Horizons spacecraft is getting a final “all clear” as it speeds closer to its historic July 14 flyby of Pluto and the dwarf planet’s five moons.

After seven weeks of detailed searches for dust clouds, rings, and other potential hazards, the New Horizons team has decided the spacecraft will remain on its original path through the Pluto system instead of making a late course correction to detour around any hazards. Because New Horizons is traveling at 30,800 mph (49,600 kph), a particle as small as a grain of rice could be lethal.

“We’re breathing a collective sigh of relief knowing that the way appears to be clear,” said Jim Green, director of planetary science at NASA. “The science payoff will be richer as we gather data from the optimal flight path, as opposed to having to conduct observations from one of the back-up trajectories.”

Mission scientists have been using the spacecraft’s most powerful telescopic camera, the Long Range Reconnaissance Imager (LORRI), to look for potential hazards, such as small moons, rings, or dust, since mid-May. The decision on whether to keep the spacecraft on its original course or adopt a Safe Haven by Other Trajectory, or “SHBOT” path, had to be made this week since the last opportunity to maneuver New Horizons onto an alternate trajectory is July 4.

“Not finding new moons or rings present is a bit of a scientific surprise to most of us,” said principal investigator Alan Stern of the Southwest Research Institute (SwRI) in Boulder, Colorado. “But as a result, no engine burn is needed to steer clear of potential hazards. We presented these data to NASA for review and received approval to proceed on course and plan. We are ‘go’ for the best of our planned Pluto encounter trajectories.”

For more information on the New Horizons mission, including fact sheets, schedules, video and images, visit: www.nasa.gov/newhorizons or solarsystem.nasa.gov/planets/plutotoolkit.cfm

Follow the New Horizons mission on Twitter and use the hashtag #PlutoFlyby to join the conversation. Live updates will be available on the mission Facebook page.

NASA’s Three-Billion-Mile Journey to Pluto Reaches Historic Encounter

RELEASE 15-149 (Click here for the full article) – 14 July 2015

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NASA’s New Horizons spacecraft is at Pluto.

After a decade-long journey through our solar system, New Horizons made its closest approach to Pluto Tuesday, about 7,750 miles above the surface — roughly the same distance from New York to Mumbai, India – making it the first-ever space mission to explore a world so far from Earth.

“I’m delighted at this latest accomplishment by NASA, another first that demonstrates once again how the United States leads the world in space,” said John Holdren, assistant to the President for Science and Technology and director of the White House Office of Science and Technology Policy. “New Horizons is the latest in a long line of scientific accomplishments at NASA, including multiple missions orbiting and exploring the surface of Mars in advance of human visits still to come; the remarkable Kepler mission to identify Earth-like planets around stars other than our own; and the DSCOVR satellite that soon will be beaming back images of the whole Earth in near real-time from a vantage point a million miles away. As New Horizons completes its flyby of Pluto and continues deeper into the Kuiper Belt, NASA’s multifaceted journey of discovery continues.”

Members of the New Horizons science team react to seeing the spacecraft's last and sharpest image of Pluto before closest approach later in the day, Tuesday, July 14, 2015 at the Johns Hopkins University Applied Physics Laboratory (APL) in Laurel, Maryland. Photo Credit: (NASA/Bill Ingalls)

Members of the New Horizons science team react to seeing the spacecraft’s last and sharpest image of Pluto before closest approach later in the day, Tuesday, July 14, 2015 at the Johns Hopkins University Applied Physics Laboratory (APL) in Laurel, Maryland. Photo Credit: (NASA/Bill Ingalls)

“The exploration of Pluto and its moons by New Horizons represents the capstone event to 50 years of planetary exploration by NASA and the United States,” said NASA Administrator Charles Bolden. “Once again we have achieved a historic first. The United States is the first nation to reach Pluto, and with this mission has completed the initial survey of our solar system, a remarkable accomplishment that no other nation can match.”

Per the plan, the spacecraft currently is in data-gathering mode and not in contact with flight controllers at the Johns Hopkins University Applied Physics Laboratory (APL) in Laurel, Maryland. Scientists are waiting to find out whether New Horizons “phones home,” transmitting to Earth a series of status updates that indicate the spacecraft survived the flyby and is in good health. The “call” is expected shortly after 9 p.m. EDT tonight.

Follow the New Horizons mission on Twitter and use the hashtag #PlutoFlyby to join the conversation. Live updates also will be available on the mission Facebook page.

For more information on the New Horizons mission, including fact sheets, schedules, video and images, visit: www.nasa.gov/newhorizons and solarsystem.nasa.gov/planets/plutotoolkit.cfm

NASA’s New Horizons ‘Phones Home’ Safe after Pluto Flyby

RELEASE 15-150 (Click here for the full article) – 14 July 2015

New Horizons Flight Controllers celebrate after they received confirmation from the spacecraft that it had successfully completed the flyby of Pluto, Tuesday, July 14, 2015 in the Mission Operations Center (MOC) of the Johns Hopkins University Applied Physics Laboratory (APL), Laurel, Maryland. Photo Credit: (NASA/Bill Ingalls)

New Horizons Flight Controllers celebrate after they received confirmation from the spacecraft that it had successfully completed the flyby of Pluto, Tuesday, July 14, 2015 in the Mission Operations Center (MOC) of the Johns Hopkins University Applied Physics Laboratory (APL), Laurel, Maryland. Photo Credit: (NASA/Bill Ingalls)

The call everyone was waiting for is in. NASA’s New Horizons spacecraft phoned home just before 9 p.m. EDT Tuesday to tell the mission team and the world it had accomplished the historic first-ever flyby of Pluto.

“I know today we’ve inspired a whole new generation of explorers with this great success, and we look forward to the discoveries yet to come,” NASA Administrator Charles Bolden said. “This is a historic win for science and for exploration. We’ve truly, once again raised the bar of human potential.”

The preprogrammed “phone call” — a 15-minute series of status messages beamed back to mission operations at the Johns Hopkins University Applied Physics Laboratory in Maryland through NASA’s Deep Space Network — ended a very suspenseful 21-hour waiting period. New Horizons had been instructed to spend the day gathering the maximum amount of data, and not communicating with Earth until it was beyond the Pluto system.

“With the successful flyby of Pluto we are celebrating the capstone event in a golden age of planetary exploration,” said John Grunsfeld, associate administrator for NASA’s Science Mission Directorate in Washington. “While this historic event is still unfolding –with the most exciting Pluto science still ahead of us — a new era of solar system exploration is just beginning. NASA missions will unravel the mysteries of Mars, Jupiter, Europa and worlds around other suns in the coming years.”

Follow the New Horizons mission on Twitter and use the hashtag #PlutoFlyby to join the conversation. Live updates also will be available on the mission Facebook page.

For more information on the New Horizons mission, including fact sheets, schedules, video and images, visit: www.nasa.gov/newhorizons and solarsystem.nasa.gov/planets/plutotoolkit.cfm

From Mountains to Moons: Multiple Discoveries from NASA’s New Horizons Pluto Mission

RELEASE 15-152 (Click here for the full article) – 15 July 2015

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Icy mountains on Pluto and a new, crisp view of its largest moon, Charon, are among the several discoveries announced Wednesday by NASA’s New Horizons team, just one day after the spacecraft’s first ever Pluto flyby.

“Pluto New Horizons is a true mission of exploration showing us why basic scientific research is so important,” said John Grunsfeld, associate administrator for NASA’s Science Mission Directorate in Washington. “The mission has had nine years to build expectations about what we would see during closest approach to Pluto and Charon. Today, we get the first sampling of the scientific treasure collected during those critical moments, and I can tell you it dramatically surpasses those high expectations.”

“Home run!” said Alan Stern, principal investigator for New Horizons at the Southwest Research Institute (SwRI) in Boulder, Colorado. “New Horizons is returning amazing results already. The data look absolutely gorgeous, and Pluto and Charon are just mind blowing.”

A new close-up image of an equatorial region near the base of Pluto’s bright heart-shaped feature shows a mountain range with peaks jutting as high as 11,000 feet (3,500 meters) above the surface of the icy body.

The mountains on Pluto likely formed no more than 100 million years ago — mere youngsters in a 4.56-billion-year-old solar system. This suggests the close-up region, which covers about one percent of Pluto’s surface, may still be geologically active today.

Follow the New Horizons mission on Twitter and use the hashtag #PlutoFlyby to join the conversation. Live updates also will be available on the mission Facebook page.

For more information on the New Horizons mission, including fact sheets, schedules, video and all the new images, visit: www.nasa.gov/newhorizons and solarsystem.nasa.gov/planets/plutotoolkit.cfm