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Blog Archive
Posted by Bill Dunford on 2013/09/09 10:12 CDT | 5 comments
We have new pictures from planet one.
Posted by Bill Dunford on 2013/07/29 01:18 CDT | 4 comments
Pushing back the frontier, and filling in the blank spaces on the map.
Return of the Pale Blue Dot
Join the Wave at Saturn (and Mercury)!
Posted by Mat Kaplan on 2013/07/18 11:27 CDT | 4 comments
You can be part of a planetwide group photo as Cassini and MESSENGER turn their cameras Earthward on July 19.
Posted by Bill Dunford on 2013/07/15 01:42 CDT | 3 comments
There's a cool new way to explore the first planet.
The Shores of the Kraken Sea: Great Place Names in the Solar System
Posted by Bill Dunford on 2013/05/28 08:59 CDT | 9 comments
Nothing reflects the romance of deep space exploration more than the evocative names of places on the planets and moons.
Dueling Desolations: Mercury vs. the Moon
Posted by Bill Dunford on 2013/05/13 01:02 CDT | 7 comments
They look so similar they can be hard to tell apart, but each hides its own mysteries.
Posted by Emily Lakdawalla on 2013/05/02 07:00 CDT | 2 comments
Note the special time! In this week's Planetary Society hangout at 5pm PDT / midnight UTC, I'll talk with MESSENGER deputy principal investigator Larry Nittler about what MESSENGER has accomplished in its prime and extended missions at Mercury, and what it stands to do if awarded a mission extension.
Posted by Bill Dunford on 2013/04/08 09:12 CDT | 4 comments
Dispatches from five different worlds--all sent by robotic spacecraft on the same day.
LPSC 2013: Seeing in Permanent Shadow
Posted by Michael Poston on 2013/04/03 01:21 CDT | 1 comments
The case for water ice hidden in permanently shadowed regions at the north pole of the planet Mercury received another boost recently. On Wednesday March 20, 2013 at the Lunar and Planetary Science Conference, Nancy Chabot presented the very first visible-light images of what is in the shadows of these polar craters.
LPSC 2013: Do we have a meteorite from Mercury?
Posted by Emily Lakdawalla on 2013/03/21 06:14 CDT | 7 comments
Before yesterday, my answer to this question would be "no." Now my answer is "probably." But it's not clear if we know which of the meteorites in our collections is from the innermost planet.
Posted by Bill Dunford on 2013/03/18 04:22 CDT
Some lovely, rarely-seen images from the MESSENGER mission.
Isostasy, gravity, and the Moon: an explainer of the first results of the GRAIL mission
Posted by Emily Lakdawalla on 2012/12/11 01:04 CST | 15 comments
Last week the GRAIL mission published their first scientific results, and what they have found will send many geophysicists back to the drawing board to explain how the Moon formed and why it looks the way it does now. To explain how, I'm going to have to back way up, and explain the basic science behind gravity data.
Water ice and organics at Mercury's poles
Posted by Emily Lakdawalla on 2012/11/29 02:16 CST | 9 comments
Water ice at Mercury's poles? That's crazy, right? The MESSENGER team has made a very good case that radar-bright material seen by the Arecibo telescope is, in fact, water ice, covered in most places by a veneer of dark organic material.
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.
MESSENGER Mission Update: First burn performed to lower extended mission altitude
Posted by Emily Lakdawalla on 2012/04/16 07:58 CDT
The MESSENGER mission just issued a press release announcing that they have completed the first step in the two-step process of lowering the spacecraft's orbit around Mercury.
Notes from the Lunar and Planetary Science Conference: Is there ice at Mercury's poles?
Posted by Emily Lakdawalla on 2012/03/22 10:28 CDT
Water ice at Mercury's poles? That's crazy, right? Mercury is so close to the Sun that it seems inconceivable that you could have water ice there. But Mercury's rotational axis has virtually no tilt (MESSENGER has measured its tilt to be less than 1 degree), so there are areas at Mercury's poles, most often (but not always) within polar craters, where the Sun never rises above the horizon to heat the surface.
Notes from Day 3 of the EPSC/DPS meeting (all about MESSENGER)
Posted by Emily Lakdawalla on 2011/10/05 11:04 CDT
Notes from Day 3 of the EPSC/DPS meeting (all about MESSENGER)
Memo to early risers: Look up!
Posted by Emily Lakdawalla on 2011/05/02 11:46 CDT
There is a traffic jam of planets on the eastern horizon in the early morning right now and for the next several weeks, a prize for those of you who have to rise before dawn.
Posted by Emily Lakdawalla on 2011/05/02 11:26 CDT
Space.com has taken advantage of the infinitely scrollable nature of Web pages to produce a really cool infographic on the scales of orbital distances in the solar system.
Posted by Emily Lakdawalla on 2011/04/19 11:21 CDT
When Mariner 10 flew past Mercury, it caught an immense impact basin lying half in and half out of sunlight, which they named Caloris. Even with only half the basin visible, scientists knew it was one of the largest in the solar system. Geologists had to wait more than 25 years to see the rest of Caloris, and when they did it turned out to be even bigger than they had thought. But the fact that Caloris was only half in sunlight was fortuitous in one sense, because it meant that the spot on Mercury that was exactly opposite the area of the Caloris impact was also partially in sunlight. That spot looks weird.
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