Articles

Emily Lakdawalla

For the second time, JAXA navigators have zoomed their cameras and other instruments in on asteroid Ryugu. The August 1 operation was quicker than the previous one, requiring only 26 hours for the descent, science, and ascent.

Emily Lakdawalla

Last week, Hayabusa2 approached to within 6000 meters of the surface of Ryugu, taking new photos. The team has developed a set of terminology to describe Hayabusa2's navigational positions around the asteroid.

Jason Davis

A global team of astronomers has found a rare type of asteroid, where two equal-mass objects circle each other in a never-ending dance as they hurtle through the solar system.

Marc Rayman

Rapidly nearing the end of a unique decade-long interplanetary expedition, Dawn is taking phenomenal pictures of dwarf planet Ceres as it swoops closer to the ground than ever before.

Jason Davis

Two new global views of Ryugu from Hayabusa2, plus a 3-D animation.

Linda Martel

Something new and wonderful appeared in the Meteoritical Bulletin Database—an entire listing of meteorites found on Mars by robotic rovers and their science teams from the years 2005–2017.

Jason Davis

With Hayabusa2 at Ryugu and OSIRIS-REx closing on Bennu, it's the summer of sample return. Why do scientists go to so much trouble for a piece of a another world?

Emily Lakdawalla

On 26 June 2018, Hayabusa2 arrived at its target asteroid, Ryugu. In a very brief status update, I present comparisons of Ryugu to other previously visited asteroids and comets.

Emily Lakdawalla

Ryugu has continued to grow in Hayabusa2's forward view, resolving into a diamond-shaped body with visible bumps and craters! They've done hazard searches, optical navigation imaging, and measured the rotation rate at 7.6 hours.

Jason Davis

Hayabusa2 continues to approach asteroid Ryugu, revealing the 900-meter-wide world in all its glory.

Marc Rayman

Propelled by the perfect combination of xenon ions, hydrazine rocket propellant and adrenaline, Dawn is on the verge of its most ambitious exploits yet.

Emily Lakdawalla

Hayabusa2 is now less than 1000 kilometers away from Ryugu, and the tiny asteroid is beginning to betray its shape.

Emily Lakdawalla

On June 3, Hayabusa2 ended use of its ion engines, for now, and is coasting the remaining distance toward Ryugu. It's using an optical navigation camera to image the asteroid's position against a field of background stars to help it navigate.

Marc Rayman

For the first time in almost a year, the Dawn mission control room at JPL is aglow with blue.

Emily Lakdawalla

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.

Van Kane

Both would do compelling science in the mid-2030s. Otherwise the two missions could not be more different.

Makoto Yoshikawa

What do we already know about Ryugu, and why is it so hard to know what it looks like? Hayabusa2 Mission Manger Makoto Yoshikawa

Marc Rayman

The Dawn mission has only one revolution to go before the spacecraft begins the final campaign of its long and rewarding deep-space adventure.

Emily Lakdawalla

The first astrobiology session at last week's Lunar and Planetary Science Conference featured talks on a huge variety of interesting topics, and was one of my favorite sessions at the meeting.

Bruce Betts

Seven very advanced amateur astronomers will help find, track, and characterize near Earth asteroids.