Enjoying EarthSky? Subscribe.

143,392 subscribers and counting ...

Space

This map shows the rover's entire traverse from landing to that point. Image credit: NASA/JPL-Caltech/MSSS/NMMNHS
Science Wire | Mar 26, 2015

Mars rover finishes first-ever marathon on another world

On Tuesday, the Mars rover Opportunity completed a marathon – 26.2 miles (42.195 kilometers). Its finish time? Eleven years and 2 months.

Jupiter_by_Cassini-Huygens
Science Wire | Mar 24, 2015

Does wandering Jupiter account for our strange solar system?

Jupiter may have swept through the early solar system like a wrecking ball, destroying a first generation of inner planets before retreating into its current orbit.

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.

milky-way-todd-lake-basin-OR-Jason-Brownlee-8-16-2014-cp
Science Wire | Mar 24, 2015

Do stars make sounds?

The stars might be singing – but, since sound can’t propagate through the vacuum of space, no one can hear them.

Based on Hubble Space Telescope images, this frame is a portion of a map of the surface of Pluto
Credit: NASA, ESA, and M. Buie (Southwest Research Institute)
Science Wire | Mar 23, 2015

Help name features on Pluto and Charon

New Horizons spacecraft will sweep past Pluto and its moons on July 15, revealing their surface features for the first time! You’re invited to help choose names.

Comet McNaught.  Photo by  Miloslav Druckmuller.  Used with permission.
Science Wire | Mar 23, 2015

When is our next Great Comet?

The Southern Hemisphere has had two Great Comets recently – McNaught in 2007 and Lovejoy in 2011. When will the Northern Hemisphere get one?

Sci fi concept of Dyson sphere  (Source)
FAQs | Mar 23, 2015

What is a Dyson sphere?

What if an advanced civilization could collect all of the energy emitted by its star?

Oct 23, 2014 partial solar eclipse by Mikael Linder
Blogs | Mar 21, 2015

Dates of lunar and solar eclipses in 2015 and 2016

Upcoming eclipses.

Image via Wikipedia
FAQs | Mar 20, 2015

Why aren’t day and night equal on the day of the equinox?

On the day of the equinox, the center of the sun would set about 12 hours after rising – given a level horizon, as at sea, and no atmospheric refraction.

"Supermoon total eclipse of equinox sun on march 20, as seen from Lisbon, Portugal - Canon EOS 7D, Sigma 70_300mm 1:4-5.6 DG / black polymer sheet filter" by Henrique Feliciano Silva
Science Wire | Mar 20, 2015

See it! Best photos of March 20 solar eclipse

Awesome photos of the March 20 solar eclipse, by EarthSky Facebook and G+ friends lucky enough to see it, and kind enough to share their pics.