Blogs
Blog Archive
Pluto's atmosphere does not collapse
Posted by Emily Lakdawalla on 2013/09/06 11:07 CDT | 1 comments
Just four months ago I posted about a paper recently published by Leslie Young and coauthors that described three possible scenarios for Pluto's atmosphere. Yesterday, Cathy Olkin, Leslie Young, and coauthors posted a preprint on arXiv that says that only one of those scenarios can be true. And it's a surprising one. The title of their paper says it all: "Pluto's atmosphere does not collapse."
Determining Near Earth Asteroids’ Properties from the California Desert
Posted by Bruce Betts on 2013/08/05 05:04 CDT | 2 comments
Shoemaker NEO Grant winner Bob Stephens specializes in lightcurves of near Earth asteroids to determine their physical properties. Here is an update on recent progress using his 2013 Planetary Society grant. This is the first in a series of updates on Shoemaker NEO Grant winners.
Upgraded Alpha Centauri Planet Search Underway
Posted by Bruce Betts on 2013/07/26 04:32 CDT
The Planetary Society sponsored Alpha Centauri planet search started using a newly upgraded system in May. Here is a quick update including info from project leader Debra Fischer from Yale about their new system.
Planetary Society Weekly Hangout: the Giant ALMA Observatory, and Asteroid Tracking
Posted by Bruce Betts on 2013/03/20 01:31 CDT
Bruce Betts, Mat Kaplan, and asteroid tracker Robert Holmes on the Planetary Society Weekly Google Hangout. Mat discussed and showed pictures from his trip to the giant ALMA observatory and we'll be joined by asteroid tracker extraordinaire, Robert Holmes.
Posted by Emily Lakdawalla on 2013/03/14 02:00 CDT
This week I'll be talking with NEOWISE principal investigator Amy Mainzer about moving objects that the WISE mission has spotted both inside and outside our solar system.
Posted by Mike Brown on 2013/03/06 10:41 CST | 3 comments
Ever wonder what it would taste like if you could lick the icy surface of Jupiter’s Europa? The answer may be that it would taste a lot like that last mouthful of water that you accidentally drank when you were swimming at the beach on your last vacation.
Shoemaker Winner Hug Discovers Near Earth Asteroid 2013 AS27
Posted by Bruce Betts on 2013/01/10 04:43 CST | 8 comments
Using a Planetary Society provided camera, Gary Hug in Kansas, USA discovered Potentially Hazardous Asteroid 2013 AS27 on Jan. 7, 2013. Shoemaker winner Bob Holmes provided the first follow up observations of this 140m-310m wide asteroid.
Asteroid 4179 Toutatis' upcoming encounters with Earth and Chang'E 2
Posted by Emily Lakdawalla on 2012/12/06 12:19 CST | 6 comments
Near-Earth asteroid 4179 Toutatis will be passing within 7 million kilometers of Earth on December 12. Both radio telescopes and the Chang'E 2 spacecraft will be acquiring images.
Calling (Really Serious) Asteroid Hunters
New Shoemaker NEO Grant Call for Proposals
Posted by Bruce Betts on 2012/11/19 10:06 CST | 9 comments
I am happy to announce a new call for proposals for The Planetary Society’s Gene Shoemaker Near Earth Object (NEO) grant program, which is celebrating its 15th Anniversary. Proposals are due Feb. 4, 2013.
DPS 2012: Double occultation by Pluto and Charon
Posted by Emily Lakdawalla on 2012/10/26 03:12 CDT | 5 comments
A few talks at last week's Division for Planetary Sciences meeting discussed observations of a double occultation -- both Pluto and Charon passing in front of the same star.
Posted by Emily Lakdawalla on 2012/10/24 01:14 CDT | 7 comments
Continuing my writeup of notes from last week's Division for Planetary Sciences meeting: presentations on the risks of future asteroid impacts. How much risk do we face, and what are the appropriate actions to take in the face of that risk?
DPS 2012, Monday: Icy moons and a four-star exoplanet
Posted by Emily Lakdawalla on 2012/10/15 11:31 CDT | 1 comments
In the first full day of the annual meeting of the Division of Planetary Sciences of the American Astronomical Society, I listened to scientific sessions on icy worlds and on an exoplanet in a four-star system.
Shoemaker NEO Winner Finds Close Fly By Asteroid
Posted by Bruce Betts on 2012/10/02 05:54 CDT
Gary Hug used his Shoemaker NEO grant provided camera to find 2012 SY49 which flew by Earth at about two lunar distances last week. The tens of meters wide asteroid is a low-probability possible Earth impactor in the future.
Saving the World: Established 1997
The Shoemaker NEO Grants at 15
Posted by Bruce Betts on 2012/09/21 01:00 CDT | 2 comments
The Planetary Society Shoemaker NEO grants celebrate their 15th anniversary of helping to find and track near Earth asteroids. Here's a quick review of the program, and updates on our four multiple-grant winners.
A fifth moon for Pluto, and a possible hazard for New Horizons
Posted by Emily Lakdawalla on 2012/07/16 02:55 CDT | 7 comments
Pluto is now known to have at least five moons (Charon, Nix, Hydra, P4, and the newly discovered P5), and its burgeoning population might pose a risk to New Horizons during its flyby, three years from now.
Salacia: As big as Ceres, but much farther away
Posted by Emily Lakdawalla on 2012/06/26 12:27 CDT | 10 comments
A newly published paper shows trans-Neptunian object Salacia to be unexpectedly large; it's somewhere around the tenth largest known thing beyond Neptune. It has a companion one-third its size, making it appear similar to Orcus and Vanth.
Posted by Emily Lakdawalla on 2012/06/14 11:00 CDT | 7 comments
A reader comment on Jay Pasachoff's post last week about Venus transits viewed from other planets had me asking whether transits of other planets were also interesting to astronomers. Jay provided some answers!
Posted by Jay Pasachoff on 2012/06/07 04:44 CDT | 3 comments
A transit of Venus as seen from Jupiter may be observed by Hubble on September 20 and a transit of Venus as seen from Saturn will be observed by Cassini on December 21.
Full Free Intro Astronomy Class Now Online
Posted by Bruce Betts on 2012/05/22 02:57 CDT | 1 comments
Bruce Betts' complete CSUDH Intro Astronomy and Planetary Science class is now available online. Find out how to access it, and go behind the scenes.
Checking up on Jupiter and Saturn
Posted by Emily Lakdawalla on 2012/02/10 01:51 CST
It's amateur astronomers, not professionals, who are shouldering the burden of constant monitoring of the weather on Jupiter and Saturn. What's going on these days in the outer solar system?�
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