Enjoying EarthSky? Subscribe.

150,748 subscribers and counting ...


Posts by Andrew R. Brown

mars-sunset-Gale-Crater-4-15-2015
Science Wire | May 10, 2015

You are there! Sunset on Mars

A beautiful new timelapse showing sunset on Mars in mid-April, 2015, from the Mars Curiosity rover.

MESSENGER will crash within the Shakespeare quadrangle, in Mercury's N. Hemisphere.
Science Wire | Apr 30, 2015

MESSENGER ends mission, crashes into Mercury

Mission control confirmed end of operations at 3:40 p.m. EDT (1934 UTC), when no signal was detected by NASA’s Deep Space Network station at Goldstone.

Saturn's moon Iapetus, imaged by the Cassini spacecraft on March 27, 2015.  Image via NASA / JPL / ESA Cassini spacecraft.
Today's Image | Apr 08, 2015

Saturn’s two-faced moon Iapetus

This isn’t the day and night side of Iapetus. It’s the day side, a nearly full-on view. The two sides of this moon of Saturn have very different brightnesses.

ceres-quad-names-March-2015-cp
Science Wire | Mar 24, 2015

Dwarf planet Ceres gets place names

First topographical map of Ceres with named quadrangles. Scientists announced the names at last week’s Lunar and Planetary Science Conference.

Image via NASA / JHU / APL MESSENGER spacecraft.
Today's Image | Feb 13, 2015

Amazing Mercury close up

The valiant MESSENGER spacecraft made Earth, Venus and Mercury flybys before its Mercury orbit four years ago. Soon it’ll crash into Mercury, but for now … new images!

View larger. | Series of 19 images captured by Rosetta’s OSIRIS camera as the Philae lander descended to the surface of Comet 67P/Churyumov–Gerasimenko on 12 November 2014. The timestamp marked on the images are in GMT (onboard spacecraft time).  Image via ESA/Rosetta/MPS for OSIRIS Team MPS/UPD/LAM/IAA/SSO/INTA/UPM/DASP/IDA
Science Wire | Feb 03, 2015

Absolutely awesome images of comet lander Philae

ESA hopes communications with the Philae comet lander can be regained by May or June. Wait you’re waiting, check out these stunning newly released images!

rosetta-comet-1-16-2015-cp
Science Wire | Jan 26, 2015

Seasons are changing on Rosetta’s comet

Two photos from the Rosetta spacecraft – one from last November, and one from a few days ago – show a comet’s seasons changing.

ceres-12-1-2014-via-Dawn-cp
Science Wire | Dec 06, 2014

As Dawn approaches, new image of dwarf planet Ceres

1 Ceres is the largest and most massive object in the main asteroid belt, between the orbits of Mars and Jupiter. Dawn will reach it in March, 2015.

Ultraviolet image of Comet Siding Spring via MAVEN
Blogs | Dec 01, 2014

What happened when the comet swept past Mars

The story you’ve been waiting for. The spacecraft images are fascinating, and the details of Comet Siding Spring’s exceedingly close pass of Mars might surprise you.

mercury-9-15-2014-MESSENGER-cp
Today's Image | Nov 21, 2014

One of the highest resolution images of Mercury, ever

MESSENGER spacecraft’s fuel is nearly depleted. It will impact Mercury in March 2015. For now, space engineers are getting some of the best-ever Mercury pics.