NASA | Observing Comet Siding Spring at Mars

Follow Comet Siding Spring at #MarsComet
On October 19, Comet Siding Spring will pass within 88,000 miles of Mars – just one third of the distance from the Earth to the Moon! Traveling at 33 miles per second and weighing as much as a small mountain, the comet hails from the outer fringes of our solar system, originating in a region of icy debris known as the Oort cloud.
Comets from the Oort cloud are both ancient and rare. Since this is Comet Siding Spring’s first trip through the inner solar system, scientists are excited to learn more about its composition and the effects of its gas and dust on the Mars upper atmosphere. NASA will be watching closely before, during, and after the flyby with its entire fleet of Mars orbiters and rovers, along with the Hubble Space Telescope and dozens of instruments on Earth. The encounter is certain to teach us more about Oort cloud comets, the Martian atmosphere, and the solar system’s earliest ingredients.
For more information, visit:
/
Follow NASA’s Journey to Mars on Twitter:
#journeytomars
This video is public domain and can be downloaded at:
Browse additional animations of Comet Siding Spring at
Like our videos? Subscribe to NASA's Goddard Shorts HD podcast:
Or find NASA Goddard Space Flight Center on Facebook:
Or find us on Twitter: