Explanation:
What's that
diamond in the sky?
Cruising though space, sometimes you'll come across an unusual object.
Such was the case on Friday for
ESA's Rosetta spacecraft
on its way to comet Churyumov-Gerasimenko in 2014.
Robotic Rosetta buzzed right by the main belt asteroid
2867 Šteins, taking many pictures, some of which have been compiled
into a
short video.
At first glance, Steins looked like a 5-kilometer wide
diamond,
but as Rosetta shot by, craters and a more extended shape become evident.
In the
above sequence of six images, a notable
chain of craters
is evident vertically on the asteroid's surface, most probably caused by a
chance collision with a stream of meteors.
Space scientists
will now study the data taken by
Rosetta of asteroid Steins in an effort to better
understand its composition, origin, and why the asteroid reflects light so
well.
As the Earth-bound scientists toil,
Rosetta itself will continue to zoom across our
Solar System, next swooping again by the Earth in 2009 November,
flying by asteroid
21 Lutetia in 2010
July,
and finally landing on
comet Churyumov-Gerasimenko in 2014 November.
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