In case you were concerned, there are no large* asteroids, comets, or anything else of a cosmic origin on a destructive collision course with Earth in the foreseeable future – and that most certainly includes this coming September.
On July 29, with ESA’s Rosetta spacecraft in orbital tow, the 2.5-mile (4-kilometer) -long Comet 67P/Churyumov-Gerasimenko fired its brightest jet yet since Rosetta’s arrival just over a full year ago, on Aug. 6, 2014.
Most of the images of 67P showing jets and outgassing activity released over the past few months have been edited to boost jet visibility but this recent flare-up needed no such enhancement. Rosetta’s high-resolution OSIRIS camera had no problem capturing the brief ice capade from 115 miles (186 km) away.
The first attempt by ESA and Rosetta to hear back from Philae has turned up only radio silence – but that doesn’t necessarily mean the lander is on permanent shutdown. It may just be that it’s still too cold and dark where Philae is to have sufficiently warmed up its components for reactivation.
“It was a very early attempt; we will repeat this process until we receive a response from Philae,” said DLR (Germany’s Aerospace agency) Project Manager Stephan Ulamec. “We have to be patient.”
After landing in an as yet unconfirmed location on comet 67P on November 12, 2014, Philae performed all of its primary science tasks before running out of battery power and entering a hibernation “safe” mode. Its reawakening is anticipated by mission engineers as the comet gets closer to the Sun over the next several months.
If you’ve been following the animated adventures of Rosetta and Philae from the European Space Agency you may have been wondering when the next episode of Philae’s big adventure would be coming. Well it’s here, and you can find out (again) what happened to the little lander on November 12, 2014 when it made its historic touchdown(s) on comet 67P/C-G.
Currently the exact location of Philae is still unknown, but mission scientists are working on finding out where it is and have hopes of hearing from the lander again as it warms up in coming months.
Watch the previous episode of “Landing on a Comet” here, and see the video above in other languages on ESA’s YouTube page here.
Captured by NASA’s Galileo spacecraft on April 5, 1997, this image shows Enki Catena, a 161.3-km (100-mile) long crater chain on the surface of Jupiter’s moon Ganymede. Named after the Sumerian god of fresh water, Enki Catena is thought to have been formed when a comet approached too close to Jupiter and was torn into 13 pieces, each impacting Ganymede in rapid succession… sort of a miniature version of what occurred in 1994 with comet Shoemaker-Levy 9.
Ganymede is not only Jupiter’s largest moon but also the largest moon in the Solar System. At 5,268 km (3,273 miles) across it is larger than Pluto and Mercury, and is the only moon that generates its own magnetosphere.
Launched in October 1989, Galileo arrived at Jupiter in December 1995 and orbited the giant planet 34 times before ending its mission with a dive into Jupiter’s atmosphere on September 21, 2003. Learn more about Galileo mission highlights here.