Tag Archives: Dark Matter

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:

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New Desktop Application Has Potential To Increase Asteroid Detection, Now Available To Public

RELEASE 15-041 (Click here for the full article) – 15 March 2015

A software application based on an algorithm created by a NASA challenge has the potential to increase the number of new asteroid discoveries by amateur astronomers.

Analysis of images taken of our solar system’s main belt asteroids between Mars and Jupiter using the algorithm showed a 15 percent increase in positive identification of new asteroids.

During a panel Sunday at the South by Southwest Festival in Austin, Texas, NASA representatives discussed how citizen scientists have made a difference in asteroid hunting. They also announced the release of a desktop software application developed by NASA in partnership with Planetary Resources, Inc., of Redmond, Washington. The application is based on an Asteroid Data Hunter-derived algorithm that analyzes images for potential asteroids. It’s a tool that can be used by amateur astronomers and citizen scientists.

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The new asteroid hunting application can be downloaded at: topcoder.com/asteroids

For information about NASA’s Asteroid Grand Challenge, visit: www.nasa.gov/asteroidinitiative

NASA Spacecraft Detects Aurora And Mysterious Dust Cloud Around Mars

RELEASE 15-045 (Click here for the full article) – 18 March 2015

NASA’s Mars Atmosphere and Volatile Evolution (MAVEN) spacecraft has observed two unexpected phenomena in the Martian atmosphere: an unexplained high-altitude dust cloud and aurora that reaches deep into the Martian atmosphere.

The presence of the dust at orbital altitudes from about 93 miles (150 kilometers) to 190 miles (300 kilometers) above the surface was not predicted. Although the source and composition of the dust are unknown, there is no hazard to MAVEN and other spacecraft orbiting Mars.

“If the dust originates from the atmosphere, this suggests we are missing some fundamental process in the Martian atmosphere,” said Laila Andersson of the University of Colorado’s Laboratory for Atmospherics and Space Physics (CU LASP), Boulder, Colorado.

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For images related to the findings, visit: http://www.nasa.gov/maven

NASA’s SOFIA Finds Missing Link Between Supernovae And Planet Formation

RELEASE 15-044 (Click here for the full article) – 19 March 2015

Using NASA’s Stratospheric Observatory for Infrared Astronomy (SOFIA), an international scientific team discovered that supernovae are capable of producing a substantial amount of the material from which planets like Earth can form.

These findings are published in the March 19 online issue of Science magazine.

“Our observations reveal a particular cloud produced by a supernova explosion 10,000 years ago contains enough dust to make 7,000 Earths,” said Ryan Lau of Cornell University in Ithaca, New York.

The research team, headed by Lau, used SOFIA’s airborne telescope and the Faint Object InfraRed Camera for the SOFIA Telescope, FORCAST, to take detailed infrared images of an interstellar dust cloud known as Supernova Remnant Sagittarius A East, or SNR Sgr A East.

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For more information about SOFIA, visit: www.nasa.gov/sofia or www.dlr.de/en/sofia

For information about SOFIA’s science mission and scientific instruments, visit: www.sofia.usra.edu or www.dsi.uni-stuttgart.de/index.en.html

NASA’s Opportunity Mars Rover Finishes Marathon, Clocks In At Just Over 11 Years

RELEASE 15-049 (Click here for the full article) – 24 March 2015

There was no tape draped across a finish line, but NASA is celebrating a win. The agency’s Mars Exploration Rover Opportunity completed its first Red Planet marathon Tuesday — 26.219 miles (42.195 kilometers) – with a finish time of roughly 11 years and two months.

“This is the first time any human enterprise has exceeded the distance of a marathon on the surface of another world,” said John Callas, Opportunity project manager at NASA’s Jet Propulsion Laboratory (JPL) in Pasadena, California. “A first time happens only once.”

The rover team at JPL plans a marathon-length relay run at the laboratory next week to celebrate.

The long-lived rover surpassed the marathon mark during a drive of 153 feet (46.5 meters). Last year, Opportunity became the long-distance champion of all off-Earth vehicles when it topped the previous record set by the former Soviet Union’s Lunokhod 2 moon rover.

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For more information about Opportunity, visit www.nasa.gov/rovers

Follow the project on social media at: twitter.com/MarsRovers and www.facebook.com/mars.rovers

NASA’s Hubble, Chandra Find Clues That May Help Identify Dark Matter

RELEASE 15-046 (Click here for the full article) – 26 March 2015

Using observations from NASA’s Hubble Space Telescope and Chandra X-ray Observatory, astronomers have found that dark matter does not slow down when colliding with itself, meaning it interacts with itself less than previously thought. Researchers say this finding narrows down the options for what this mysterious substance might be.

Dark matter is an invisible matter that makes up most of the mass of the universe. Because dark matter does not reflect, absorb or emit light, it can only be traced indirectly by, such as by measuring how it warps space through gravitational lensing, during which the light from a distant source is magnified and distorted by the gravity of dark matter.

To learn more about dark matter and test such theories, researchers study it in a way similar to experiments on visible matter — by watching what happens when it bumps into other objects. In this case, the colliding objects under observation are galaxy clusters.

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For images and more information about the Hubble Space Telescope, visit: www.nasa.gov/hubble

For more Chandra images, multimedia and related materials, visit: www.nasa.gov/mission_pages/chandra/main