Two comets that will safely fly past Earth later this month may have more in common than their intriguingly similar orbits. They may be twins of a sort.
Ready for the next big 'Comet of the Century?' Yeah, us too. Cometary apparitions are the big unknown in backyard astronomy, an eternal uncertainty in the clockwork goings-on of the universe.
Scientists gave up Friday trying to contact robot lab Philae, stubbornly silent on the surface of a comet streaking through space—closing a captivating chapter in an historic quest.
Twelve years ago, the European Space Agency (ESA) launched a spacecraft with a very precious cargo—a robot laboratory designed to land on a comet and photograph, prod and sniff its surface.
There are no large caverns inside Comet 67P/Churyumov-Gerasimenko. ESA's Rosetta mission has made measurements that clearly demonstrate this, solving a long-standing mystery.
This beautiful landscape feels within arm's reach in this stunning view across the Imhotep region on Comet 67P/Churyumov–Gerasimenko.
For the first time, scientists have spotted large patches of water ice on the surface of a comet, thanks to instruments aboard the European Space Agency's Rosetta orbiter.
Have you seen it? 2016 has kicked off with a fine apparition of a binocular comet: C/2013 US10 Catalina. We've been following this icy visitor to the inner solar system the first few mornings of the year, a welcome addition ...
Scientists will send a few final prods to robot lab Philae, incommunicado on the surface of a comet hurtling through space, but hopes for a reply are running out, they said Tuesday.