Decision time? Check out our latest product comparisons

Comets

All three of NASA's orbiters were moved to the far side of Mars to protect them from comet...

After a dramatic, one-in-a-million-years close encounter between Mars and comet Siding Spring on Sunday, all five functioning US Mars probes survived and are reportedly healthy. NASA confirms that the Mars Odyssey, Mars Reconnaissance Orbiter (MRO), and the Mars Atmosphere and Volatile Evolution (MAVEN) orbiter, along with the rovers Curiosity and Opportunity came through without a scratch and are returning valuable data on the comet.  Read More

The assets that will be used to observe Siding Spring as it skims past Mars (Image: NASA)

NASA is busy readying its considerable arsenal of scientific instruments, spacecraft and rovers for a close encounter with comet C/2013 A1 on Sunday, Oct 19. The comet's closest approach with a planetary body will be with Mars, at which point it will miss the Red Planet by only 87,000 miles (140,013 km), less than half the distance between Earth and our moon, traveling at speeds of up to 126,000 mph (202,777 km/h).  Read More

Landing site J (pictured on the right) has been selected as Philae's primary landing site ...

The Rosetta mission's Landing Site Selection Group has selected the primary and back up landing sites for the ESA's Philae probe ahead of an attempted touchdown on 67P/Churyumov–Gerasimenko on November 11. Selecting sites J and C as the primary and back up sites respectively was no easy task, with mission operators weighing up various factors and racing against time since the spacecraft entered orbit around the comet on August 6. Prior to this, the comet had simply been too far away to characterize.  Read More

The Rosetta spacecraft has collected enough information to render a map of the various are...

As the European Space Agency's (ESA) Rosetta spacecraft continues its mission by accompanying comet 67P/Churyumov-Gerasimenko (67P, for short) on its journey into the inner solar system, sensing instruments have been studying it prior to an attempted a landing by Rosetta's Philae probe. As a result, the spacecraft has collected enough information to render a map of the various areas on the surface of the comet showing that it is composed of several different regions created by a range of forces acting upon the object.  Read More

Artist's impression of Rosetta and 67P/Churyumov-Gerasimenko (Image: ESA/ATG Medialab)

Comets are often described as "dirty snowballs" of ice and dust, which suggests something that looks like what kids throw at each other in winter. But NASA’s Alice instrument package installed aboard the ESA Rosetta probe currently orbiting comet 67P/Churyumov-Gerasimenko has sent back its first science data, which shows that the comet is about as white and fluffy as a lump of coal.  Read More

Artist's impression of Rosetta having released the Philae lander (Image: ESA-J. Huart, 201...

Rosetta is a mission of firsts. It is the first mission to successfully chase and rendezvous with a comet, and hopefully in November it will be the first spacecraft to make a soft landing on a celestial body that's so unlike anything we have explored before. Unfortunately, as is so often the case with firsts, there are untold risks and complications that are difficult to foresee ahead of time, but here are some of the dangers that we know about.  Read More

Artist's concept of the Philae lander that is set to touch down on comet 67P/Churyumov-Ger...

After you become the first spacecraft to orbit an asteroid, what do you do for an encore? For ESA’s Rosetta comet probe, the answer is to get ready for the first soft landing on a comet nucleus. Only weeks after going into orbit around comet 67P/Churyumov-Gerasimenko, the unmanned Rosetta explorer is engaged in a fast-paced reconnaissance of the comet and has identified five candidate sites for putting down the Philae lander in November.  Read More

NASA has selected five finalists to move on in its NIAC Program

NASA has chosen five studies to advance to phase 2 of its Innovative Advanced Concepts (NIAC) Program. The successful projects were chosen via a system of peer review, and represent the most promising technological concepts with the greatest potential to revolutionize the agency's approach to the building and operating of aerospace systems.  Read More

The Rosetta spacecraft is now in orbit around comet 67P/Churyumov–Gerasimenko (Image: ESA)

The list of space firsts got a little longer this week. On August 6 at 11:30 am CET, ESA's Space Operations Centre (ESOC) in Darmstadt, Germany received radio signals confirming that Rosetta had begun its approach and was going into orbit around comet 67P/Churyumov–Gerasimenko, making Rosetta the first spacecraft to go into orbit around a comet.  Read More

Artist's impression of the ESA's Rosetta spacecraft (Image: ESA–J. Huart, 2013)

The ESA's Rosetta spacecraft is now close enough to its target, the comet 67P/Churyumov-Gerasimenko (67P), to begin to discern some of the surface features marking the face of the lonely wanderer. Taken from a distance of 3,400 miles (5,500 km), the images will provide the first detailed insight into the comet due to be visited by Rosetta's Philae lander in November 2014.  Read More

Looking for something? Search our 29,033 articles