Tag archives: space
The “Spirit” comic strip on the xkcd.com webcomic (Credit: Randall Munroe/Creative Commons)
By Tushna Commissariat
The long and tumultuous journey for NASA’s Mars rover Spirit has finally come to an end, as the space agency’s engineers have ended attempts to regain contact with the vehicle, which has been out of touch since 22 March 2010. Now, Spirit’s twin, Opportunity, will explore the red sands solo until the arrival of younger brother Curiosity – NASA’s third rover, set to be launched in November.
The end of the road for Spirit came yesterday, when NASA engineers made a final and unsuccessful attempt to contact the rover. They had hoped that Spirit might rejuvenate as the solar energy became available once more, after a rather cold and dreary Martian winter without much sunlight. But without enough energy to run its survival heaters, the rover likely experienced colder internal temperatures last year than in any of its previous six years on Mars, possibly causing critical internal damage.
“Our job was to wear these rovers out exploring, to leave no unutilized capability on the surface of Mars, and for Spirit, we have done that,” says Mars Exploration Rover Project manager John Callas of NASA’s Jet Propulsion Laboratory in Pasadena, California.
Spirit landed on Mars on 3 January 2004 for what was planned as a three-month mission. After accomplishing its primary objectives, Spirit went on to explore a distance of 7.7 km, almost 12 times its initial goal. Spirit became the first robot to climb to the summit of a hill on another planet; and covered more than half a mile after its right-front wheel became immobile in 2006. Over time, it sent home more than 124,000 images, looked at 92 samples of soil and rock and unexpectedly discovered silica deposits in the Martian soil when it upturned soil due to a dragging back wheel. This was, ironically, one of the biggest discoveries made by a rover to date.
“What’s most remarkable to me about Spirit’s mission is just how extensive her accomplishments became,” enthuses Steve Squyres of Cornell University, Ithaca, a principal investigator for Spirit and Opportunity. “What we initially conceived as a fairly simple geologic experiment on Mars ultimately turned into humanity’s first real overland expedition across another planet. Spirit explored just as we would have, seeing a distant hill, climbing it and showing us the vista from the summit. And she did it in a way that allowed everyone on Earth to be part of the adventure.”
Just in case you are about to shed a tear, you might enjoy the above image that Randall Munroe, a former physicist who is now behind the popular xkcd.com webcomic, drew sometime last year when contact was lost with the rover. A rather touching and prophetic image, he brings out the human side of our robot geologist.
Hubble’s “Rose of Galaxies” anniversary image
(Courtesy: NASA, ESA, A Riess (STScI/JHU), L Macri (Texas A&M University) and Hubble Heritage Team (STScI/AURA))
By Tushna Commissariat
Millions of people worldwide have exclaimed in awe and wonder at the images that the Hubble Space Telescope (HST) has been producing for more than two decades. The satellite has had a significant impact on all fields of science from planetary science to cosmology ever since it was launched on 24 April 1990 aboard Discovery’s STS-31 mission. In a bid to celebrate the 21st anniversary of the HST, astronomers at the Space Telescope Science Institute in Baltimore, Maryland, in the US pointed Hubble’s eye at a particularly magnificent cosmic phenomenon – a pair of interacting galaxies in the shape of a rose.
The newly released Hubble image shows two interacting galaxies known as Arp 273. The larger of the spiral galaxies – UGC 1810 – has a disc that is being distorted into a rose-like spiral thanks to the gravitational tidal pull of the companion galaxy below it, known as UGC 1813. The smaller companion shows signs of intense star formation at its nucleus, quite possibly triggered by the smaller galaxy actually passing through the disc of the larger galaxy. A veil of bright and hot young blue stars glows across the top of the dancing discs.
Arp 273 lies in the constellation Andromeda and is about 300 million light-years away from Earth. Though the galaxies are separated from each other by tens of thousands of light-years, they are connected by a tidal bridge of material between them that formed post interaction.
Take a look at the gorgeous image (above) and a video (below) zooming into the region of the galaxies.
In other space-related news, the final launch of the space shuttle Endeavour will take place tomorrow, 29 April, from Florida’s Space Coast in the US. So while Britons and many others all over the world will be watching the royal wedding, Kennedy Space Center is anticipating the arrival of an estimated half a million onlookers, eager to watch the space shuttle lift off one more time. Endeavour, first launched in May 1992, is expected to carry six astronauts, a cargo bay full of spare supplies and a $2bn astrophysics experiment to the International Space Station.
To look at some interesting images in the follow-up to the launch, look here: http://www.space.com/11221-photos-space-shuttle-endeavour-final-mission-sts134.html