Tag Archives: Kuiper Belt

“Planet 9 From Outer Space” – Thursday, April 19 At Liverpool Public Library

Greetings, fellow astrophiles!

And apologies for the short-ish notice. This is not a showing of the movie “Plan 9,” but risks being just as cheesy. CNYO makes its yearly (if not more often) return to LPL this Thursday with a lecture that actually overlaps nicely with a lecture topic from a few years back that was presented at a CNY Skeptics meetings – We step out from our discussion of Ceres and Pluto into a discussion of Pluto and the theorized Planet IX (not to be confused with Planet X). As always, we check on the state of the binocular loaner program as well, with hopes that all have been reserved and none are available.

Link details can be found at calendar.lpl.org


Caption: The 6 most distant objects known in the Solar System, then the predicted orbit of the unknown 7th. Image courtesy of Caltech/R. Hurt (IPAC)

Planet 9(,) From Outer Space

Event Type: Adult Programs
Date: 4/19/2018
Start Time: 7:00 PM
End Time: 8:30 PM
Description: History, Politics and Physics Out Beyond Neptune

google map directions to LPL.

Pluto had a remarkably good and lucky run as the 9th planet in our Solar System. Its demotion to dwarf planet status in late 2006 was due to a number of factors, driven largely by the discovery that Pluto is not alone either in size or in location out beyond Neptune’s orbit. Modern telescopes have discovered numerous dwarf planets out in the Kuiper Belt – a region of the Solar System for which Pluto is now the most famous member. By determining the orbits of these distant objects, astrophysicists have even made the prediction that something much larger in size must be lurking in the distance – large enough to qualify as a true planet if and when it is officially observed.

Dr. Damian Allis is a NASA Solar System Ambassador, director of CNY Observers and writes the monthly “Upstate New York Stargazing” column for syracuse.com and newyorkupstate.com.

Location: Carman Community Room
Presenter: Cindy Hibbert

Free Astronomy Magazine – July-August 2017 Issue Available For Reading And Download

Greetings, fellow astrophiles!

The most recent issue of Free Astronomy Magazine (July-August, 2017) 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 series of articles on great free online content for amateur astronomers (see A Universe Of Free Resources Part 1) and we’ll be keeping track of future publications under the Online Resources category on the CNYO website.

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 the issue has to offer, the Table of Contents is reproduced below.

July-August 2017

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

July-August 2017 – www.astropublishing.com/4FAM2017/

For those who want to jump right to the PDF download (27 MB), Click here: July-August 2017

NASA Space Place – Is There A Super-Earth In The Solar System Out Beyond Neptune?

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 August, 2016.

By Dr. Ethan Siegel

2013february2_spaceplaceWhen the advent of large telescopes brought us the discoveries of Uranus and then Neptune, they also brought the great hope of a Solar System even richer in terms of large, massive worlds. While the asteroid belt and the Kuiper belt were each found to possess a large number of substantial icy-and-rocky worlds, none of them approached even Earth in size or mass, much less the true giant worlds. Meanwhile, all-sky infrared surveys, sensitive to red dwarfs, brown dwarfs and Jupiter-mass gas giants, were unable to detect anything new that was closer than Proxima Centauri. At the same time, Kepler taught us that super-Earths, planets between Earth and Neptune in size, were the galaxy’s most common, despite our Solar System having none.

The discovery of Sedna in 2003 turned out to be even more groundbreaking than astronomers realized. Although many Trans-Neptunian Objects (TNOs) were discovered beginning in the 1990s, Sedna had properties all the others didn’t. With an extremely eccentric orbit and an aphelion taking it farther from the Sun than any other world known at the time, it represented our first glimpse of the hypothetical Oort cloud: a spherical distribution of bodies ranging from hundreds to tens of thousands of A.U. from the Sun. Since the discovery of Sedna, five other long-period, very eccentric TNOs were found prior to 2016 as well. While you’d expect their orbital parameters to be randomly distributed if they occurred by chance, their orbital orientations with respect to the Sun are clustered extremely narrowly: with less than a 1-in-10,000 chance of such an effect appearing randomly.

Whenever we see a new phenomenon with a surprisingly non-random appearance, our scientific intuition calls out for a physical explanation. Astronomers Konstantin Batygin and Mike Brown provided a compelling possibility earlier this year: perhaps a massive perturbing body very distant from the Sun provided the gravitational “kick” to hurl these objects towards the Sun. A single addition to the Solar System would explain the orbits of all of these long-period TNOs, a planet about 10 times the mass of Earth approximately 200 A.U. from the Sun, referred to as Planet Nine. More Sedna-like TNOs with similarly aligned orbits are predicted, and since January of 2016, another was found, with its orbit aligning perfectly with these predictions.

Ten meter class telescopes like Keck and Subaru, plus NASA’s NEOWISE mission, are currently searching for this hypothetical, massive world. If it exists, it invites the question of its origin: did it form along with our Solar System, or was it captured from another star’s vicinity much more recently? Regardless, if Batygin and Brown are right and this object is real, our Solar System may contain a super-Earth after all.

This article was provided by the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration.

August2016.en

Caption: A possible super-Earth/mini-Neptune world hundreds of times more distant than Earth is from the Sun. Image credit: R. Hurt / Caltech (IPAC)

About NASA Space Place

With articles, activities, crafts, games, and lesson plans, NASA Space Place encourages everyone to get excited about science and technology. Visit spaceplace.nasa.gov (facebook|twitter) to explore space and Earth science!