Join Donate

Blog Archive

 

The Disturbance is Starting

Emily Lakdawalla • November 11, 2010

Jupiter's faded belt may be coming back.

DPS 2010: Pluto and Charon opposition surges, Nix and Hydra masses, Pluto and Eris compositions

Emily Lakdawalla • October 25, 2010

An awful lot of the talks in the Pluto session on Tuesday morning, October 5, at the Division of Planetary Sciences meeting spent more time focusing on how bad weather conditions were during the astronomers' attempts to view Pluto as it occulted background stars than they did on any measurements or science that came out from the data.

Early warning for close approaches of two house-sized asteroids

Emily Lakdawalla • September 08, 2010

Most of you have probably heard by now of two small asteroids, both in the neighborhood of 10 meters in diameter, recently discovered on trajectories that pass unusually close to Earth.

From the Ground and from Space, New Planetary Systems Unveiled

Amir Alexander • August 27, 2010

Two nearly simultaneous announcements by scientists that they have detected entire planetary system deep in space have set the astronomical community abuzz.

The August 20, 2010 Jupiter fireball -- and the March 5, 1979 one

Emily Lakdawalla • August 24, 2010

Following up on the story I first posted on August 22, the Jupiter impact fireball first noticed by Japanese amateur astronomer Masayuki Tachikawa has been independently confirmed by two other Japanese astronomers.

Yet another Jupiter impact!? August 20, seen from Japan

Emily Lakdawalla • August 22, 2010

This may be a very common event after all: another optical flash has been observed on Jupiter, again from an observer far east of the Greenwich meridian, though it was not Anthony Wesley (for once).

2008 LC15, the first Trojan asteroid discovered in Neptune's L5 point

Emily Lakdawalla • August 13, 2010

Congratulations to Scott Sheppard and Chad Trujillo for identifying the first known L5 Trojan asteroid of Neptune!

Volcanism across the solar system: Io

Emily Lakdawalla • July 20, 2010

Three months ago, grandiosely, I announced that I was going to survey volcanism across the solar system, and I began the journey on Earth. Then I failed to follow up.

Is this SMART-1's impact site?

Emily Lakdawalla • June 15, 2010

Speaking of spacecraft crashing...

Pretty picture: Messier 83

Emily Lakdawalla • May 19, 2010

What does a barred spiral galaxy look like? THIS is what a barred spiral galaxy looks like.

Jupiter has lost a belt!

Emily Lakdawalla • May 10, 2010

Via Daniel Fischer's Tweet about a blog entry by Astro BobI learned of something which should be obvious to anyone who has trained even a rather small telescope on Jupiter over the past few weeks: one of its iconic stripes is just plain gone.

Two cool discoveries today: icy-hot exoplanet and smallest ever Kuiper Belt object

Emily Lakdawalla • December 16, 2009

There are two cool stories circulating today on the theme of discovering new places in the cosmos.

Video from Palomar Observatory on LCROSS impact night

Emily Lakdawalla • October 10, 2009

The Palomar Observatory adaptive optics image of the crater Cabeus remains the best I've seen from ground-based telescopes of the LCROSS impact site.

Palomar image of crater Cabeus after LCROSS impact

Emily Lakdawalla • October 09, 2009

Here's the sharpest optical image shown today of the Moon, from Palomar Observatory.

MMT image of the plume and its shadow?

Emily Lakdawalla • October 09, 2009

I am pretty sure this image shows the LCROSS impact plume and its shadow as seen from the MMT observatory in Arizona, but as Alan Boyle just pointed out, the time stamps indicate the photos were all taken before the nominal impact time.

Gravity's Bow

Timothy Reed • June 15, 2009

Timothy Reed explains how optical telescopes are tested for gravity sag, and the methods used to counteract or compensate for it.

Aloha, Io

John Spencer • June 08, 2009

Taking a look at Jupiter's moon, Io, from Hawaii.

Farewell to Hubble, Obama Calls, Astronauts Testify to Congress as Shuttle is Set to Land

Ken Kremer • May 22, 2009

Farewell to Hubble, Obama Calls, Astronauts Testify to Congress as Shuttle is Set to Land

An Auspicious Week for Astronomy

Mark Adler • May 11, 2009

On Monday, if all goes well, we will launch the Space Shuttle to rejuvenate one the greatest scientific missions launched on or off the Earth: the Hubble Space Telescope.

Mapping Mars, now and in history

Emily Lakdawalla • February 26, 2009

Planetary cartographer Phil Stooke has been working on a cool project to compose and compare maps of Mars that show how we saw the planet throughout the Space Age.

Items 61 - 80 of 84  Previous12345Next
astronaut on Phobos
Let's Change the World

Become a member of The Planetary Society and together we will create the future of space exploration.

Join Today

Mars
Advocacy

Our Advocacy Program provides each Society member a voice in the process. Funding is crucial.

Donate

You are here: