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Our journalists and guest bloggers bring you stunning imagery and the space stories that matter most.

#Mercury2018: From MESSENGER to BepiColombo and beyond

Emily Lakdawalla • May 17, 2018 • 5

A Mercury meeting held May 1-3 summarized the current and future science of the innermost planet. Emily Lakdawalla was there and shares her notes.

Philae science results: Comet 67P is crunchy on the outside, soft on the inside

Emily Lakdawalla • May 09, 2018 • 1

What is the surface of a comet like? That's one of the main questions that motivated Philae's mission to the surface of comet 67P/Churyumov-Gerasimenko. We now know the comet has a rigid crust about 10 to 50 centimeters thick, below which the comet is much more fluffy.

#LPSC2018: Mars mass wasting in the laboratory

Jake Robins • March 26, 2018 • 5

Mars today is a dynamic place. One visually dramatic sign of change on Mars is "mass wasting," more commonly known as "stuff falling downhill". Scientists presented the results of recent laboratory work on Mars mass wasting at last week's Lunar and Planetary Science Conference.

Yoshihide Kozai (1928 - 2018)

Konstantin Batygin • February 27, 2018 • 2

Caltech planetary scientist Konstantin Batygin pays tribute to a pioneer in celestial mechanics.

#AGU17: Spherical harmonics, gravity, and the depth of winds at Jupiter

Emily Lakdawalla • December 20, 2017 • 3

Results from the Juno gravity science experiment presented at last week's American Geophysical Union meeting suggest Jupiter's winds penetrate only to 3000 kilometers deep.

#DPS17: The Moon's Giordano Bruno crater through many eyes

Emily Lakdawalla • October 30, 2017

Today's story from the Division for Planetary Sciences meeting looks at one youthful rayed crater on the Moon from many different spacecraft.

#DPS17: Wobbling the Moon and art by James Tuttle Keane

Emily Lakdawalla • October 24, 2017 • 1

James Tuttle Keane is increasingly famous (among planetary scientists anyway) for his remarkable illustrated notes from conferences. Here's his work from the Division for Planetary Sciences meeting, illustrating both his own and others' research.

#DPS2017: Progress report on Mars Reconnaissance Orbiter images of comet C/2013 A1 Siding Spring

Emily Lakdawalla • October 20, 2017 • 1

Three years ago, on October 19, 2014, comet C/2013 A1 Siding Spring passed within 138,000 kilometers of Mars. At the 2017 meeting of the Division for Planetary Sciences of the American Astronomical Society, we heard a progress report on Mars orbiter imaging of the comet's nucleus.

In total eclipse of a star, New Horizons' future flyby target makes its presence known

Emily Lakdawalla • July 19, 2017

The team reported two weeks ago that the first attempts at observing 2014 MU69 were unsuccessful. But in their third try, on July 17, astronomers in Argentina saw the telltale sign of MU69's presence: a stellar wink.

Geology on Mars: Using stratigraphic columns to tell the story of Gale Crater

Heidi Stauffer • May 15, 2017

Stratigraphic columns are a basic tool in geology, used on both Earth and Mars to tell the story of a location. But what are they really?

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