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Science Wire | Oct 16, 2014

What are super-Earths made of?

Astronomers struggle to learn about super-Earths – bigger than our Earth, smaller than Neptune – the most common type of planet found by the Kepler spacecraft.

Science Wire | Oct 15, 2014

Alright! Hubble finds potential targets for Pluto spacecraft

After a long search at the solar systems’ fringes, scientists say they have three possible targets for the New Horizons spacecraft after its July 2015 Pluto flyby.

Science Wire | Oct 15, 2014

Spacecraft catches Mars atmosphere in act of escaping

Earth’s atmosphere is leaking into space, too, but only very, very slowly. Meanwhile, Mars is thought to have lost much of its atmosphere already.

Science Wire | Oct 13, 2014

Milky Way’s dark matter half what we thought?

Australian astronomers say our Milky Way galaxy has only half the dark matter we thought it did. If so, it explains the shortage of Milky Way satellites.

Science Wire | Oct 12, 2014

Active moon volcanos in geologically recent times

Last volcanic activity on moon thought to be a billion years ago. Now small lava flows on moon’s dark plains suggest activity as recently as 50 million years ago.

Earth and moon from Mercury's orbit
Science Wire | Oct 11, 2014

MESSENGER spacecraft sees lunar eclipse from Mercury

The MESSENGER spacecraft, now orbiting Mercury, caught the images to make this movie of last Wednesday’s lunar eclipse. See Earth and moon from Mercury!

Meteor seen during 2013 Eta Aquarid shower by Justin Ng
Tonight | Oct 11, 2014

EarthSky’s meteor shower guide for 2014

Next up … the Orionid meteor shower on the night of October 20-21. It’s a grand year for this shower!

Science Wire | Oct 09, 2014

Mapping the weather on an extreme exoplanet

Scientists using the Hubble Space Telescope have completed the first map of temperature and water vapor on a “hot Jupiter,” an exoplanet called WASP 43b.

Total lunar eclipse composite image by Fred Espenak
Tonight | Oct 09, 2014

October 2014 guide to the five visible planets

Orionid meteor shower night of October 20-21. Comet Siding Spring just misses Mars on October 19. A partial solar eclipse on October 23. Plus Mars, Saturn, Mercury and Jupiter!

Close-up of the boulder Cheops as it casts a long shadow on the surface of comet 67P/Churyumov-Gerasimenko. Cheops has a size of approximately 45 meters and is the largest structure within an a group of boulders located on the lower side of the comet’s larger lobe. The image was obtained on September 19th by Rosetta’s scientific imaging system OSIRIS from a distance of 28.5 kilometers. One pixel in this image corresponds to 50 centimeters.  Image via ESA/Rosetta/MPS for OSIRIS Team MPS/UPD/LAM/IAA/SSO/INTA/UPM/DASP/IDA
Science Wire | Oct 09, 2014

First named feature on a comet!

Scientists have named one of the largest boulders on Rosetta’s comet after an Egyptian pyramid.