Articles

Mat Kaplan

Professor Bell's topic is

Emily Lakdawalla

A frequently-asked question last week was: if asteroid 2012 DA14 is coming so close to Earth, why hasn't anyone taken any pictures of it? Now that 2012 DA14 has whizzed past us, we do finally have some radar pictures of it, but they still may not satisfy everyone.

Emily Lakdawalla

Last week, I posted an explainer on why Hubble's images of galaxies show so much more detail than its images of Pluto. Then I set you all a homework problem: when will New Horizons be able to see Pluto better than Hubble does? Here's the answer.

Edward Gomez

Mostly the Universe stays unchanged for hundreds, thousands or even millions of years. There are some cases however when some things change really rapidly. Recently I observed one of these rapidly changing, transient phenomena, as asteroid called 2012 DA14. I work for Las Cumbres Observatory and we have been trying to observe this asteroid since 5 February.

Emily Lakdawalla

How come Hubble's pictures of galaxies billions of light years away are so beautifully detailed, yet the pictures of Pluto, which is so much closer, are just little blobs? I get asked this question, or variations of it, a lot. Here's an explainer.

Bruce Betts

The 45 meter asteroid 2012 DA14 will pass closer to Earth than geostationary satellites on Feb. 15, 2013. Learn about the asteroid and what to expect from the close approach.

Emily Lakdawalla

I had one of those

Ganna (Anya) Portyankina

The Mars I study is really active; the surface constantly changes. We have collected a lot of image data about changing seasonal features near the south pole. There is so much that we can't analyze all of it on our own. We need your help, through a new Zooniverse project named PlanetFour.

Emily Lakdawalla

The Curiosity mission held a press briefing this morning for the first time since the American Geophysical Union meeting, and it was jam-packed with science. The biggest piece of news is this: it was worth it, scientifically, to go to Glenelg first, before heading to the mountain.

Jason Davis

Taking a closer look at KOI 172.02, a super-Earth exoplanet sitting in its solar system's habitable zone.

Emily Lakdawalla

This year's American Astronomical Society meeting featured tons and tons of news on exoplanets. They're everywhere! And not just planets, but also asteroids, comets, and more....

Emily Lakdawalla

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.

Emily Lakdawalla

Monday was the big Curiosity day at the fall meeting of the American Geophysical Union. A morning press briefing was followed by an afternoon science session. I traveled to San Francisco briefly just to attend those two events. Here's my notes on the first science reports from the mission.

Emily Lakdawalla

I'm in San Francisco, reporting from the American Geophysical Union meeting. This morning, there was a much-anticipated press briefing featuring the latest results from Curiosity.

Emily Lakdawalla

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.

Emily Lakdawalla

Springer has made online access to PDF copies of several of their journals free through November 30. One of them, Space Science Reviews, is the one that publishes the canonical papers on most spacecraft instruments. It's a bonanza!

Emily Lakdawalla

I asked Mars Reconnaissance Orbiter to take a photo, and it turned out better than I had imagined: an incredibly fresh, well-preserved, dramatically rayed oblique impact crater.

Emily Lakdawalla

I'm directing a question at professional and amateur space scientists and educators: could I make slide sets that would help you educate the public about what's going on in planetary exploration?

Emily Lakdawalla

Today I stumbled upon the Lunar and Planetary Institute's Lunar Sample Atlas, and was reminded of how much I love petrographic thin sections. They can make unassuming, cruddy looking rocks beautiful.

Emily Lakdawalla

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.