Enjoying EarthSky? Subscribe.

116,515 subscribers and counting ...


Posts by Andrew R. Brown

Hydra1-2-July-2015-cp
Science Wire | Sep 17, 2014

Racing toward Pluto, spacecraft spies tiny moon Hydra

The New Horizons spacecraft – due to encounter Pluto in July 2015 – has spotted Pluto’s small, faint, outermost known moon, called Hydra.

Closeup on Site J, the landing site for the Philae lander in ESA's exciting Rosetta comet mission.
Science Wire | Sep 15, 2014

ESA announces landing site on Rosetta’s comet

Rosetta spacecraft has been moving in tandem with its comet since August. On Monday, ESA announced the site of a November landing.

0713MR0030220000402622L01_DXXX Sol 713 Phobos passing in front of the Sun 100mm MastCam MSL Curiosity-cp
Today's Image | Sep 15, 2014

Mars moon Phobos in front of sun on August 8

The Curiosity rover on the floor of the Gale Crater caught this image of Mars’ larger moon Phobos passing in front of the sun on August 8, 2014.

Rosetta_mission_selfie_at_comet-cp
Science Wire | Sep 11, 2014

Rosetta spacecraft selfie with comet

An otherworldly take take on an earthly trend, as Rosetta poses with its comet, 67P/Churyumov–Gerasimenko.

Neptune and Triton as seen by New Horizons.
Science Wire | Aug 25, 2014

Pluto-bound New Horizons crosses Neptune’s orbit

NASA says this is New Horizons’ last major crossing en route to becoming the first probe to make a close encounter with distant Pluto on July 14, 2015.

Landing site finalist A
Science Wire | Aug 25, 2014

Five finalists for Philae landing site on Rosetta’s comet

Five finalists named as potential landing sites this November for Philae lander in ESA’s fabulous Rosetta comet mission. Comet 67P/Churyumov–Gerasimenko, here we come.

Neptune and Triton, via Voyager 2
Blogs | This Date in Science | Aug 25, 2014

Back to the future with Neptune’s fascinating moon Triton

On the anniversary of Voyager 2’s encounter with Neptune and Triton … an awesome collection of restored Voyager 2 images, plus the link between Triton and Pluto.

Second, the southern half of Orion the Hunter with the three belt blue supergiant stars Alnitak, Alnilam and Mintaka visible in the Earth's atmosphere. The blue supergiants Saiph and Rigel.  Below the constellation of Lepus the Hare. To the lower left, the constellation of Canis Major, the Great Dog, with the bight stars, Sirius (the brightest object and one of the closest outside of our solar system), powerful blue giant Mirzam, blue supergiant, Adhara (one of the most powerful stars visible from Earth), the huge immensely powerful yellow supergiant Wezen (another one of the most powerful stars visible from Earth) and the blue supergiant Aludra.
Today's Image | Aug 17, 2014

Awesomeness from the International Space Station

What would it be like to view the Earth and the sky from the vantage point of the International Space Station? These three photos from ISS tell the tale.

Close-up detail of comet 67P/Churyumov-Gerasimenko. The image was taken by Rosetta’s OSIRIS narrow-angle camera and downloaded on August 6, 2014. The image shows the comet’s ‘head’ at the left of the frame, which is casting shadow onto the ‘neck’ and ‘body’ to the right.  The image was taken from a distance of 120 km and the image resolution is 2.2 meters per pixel.  Via ESA Rosetta mission image page.
Science Wire | Aug 06, 2014

Success! A final flawless burn. Rosetta now in tandem with its comet

Look here for a fascinating history in pictures and words of the Rosetta spacecraft’s historic approach to Comet 67P/Churyumov–Gerasimenko.

Mercury, via MESSENGER
Blogs | Aug 04, 2014

Zoom close to Mercury’s surface via MESSENGER spacecraft

You’ve got to see the movie made by the MESSENGER spacecraft in June 2014, when it began a series of close passes to the sun’s innermost planet, Mercury.