Friday 23 April 1999
But Nasa engineers have shown that smart software can keep aircraft flying, even if some of their control surfaces are disabled. The tests took place at the Dryden Flight Research Center at the American National Aeronautics and Space Administration (Nasa) in California using a modified F-15 fighter aircraft, similar to those used in the Balkans. For the first time, neural nets were shown to be capable of keeping the damaged aircraft under control even at supersonic speeds.
THREE OF the six gyroscopes used by the Hubble Space Telescope to keep its delicate orientation in space have now failed, as confirmed by Nasa this week.
The third gyroscope to fail began to behave erratically in January. Its loss means that the Hubble will have to stop operating if any of its remaining three gyros fail. "Any further gyroscope failure will cause the observatory to go into a protective safe mode that gives ground controllers complete control of the telescope, but prevents its use for taking observations of the sky," Nasa said. A repair mission is scheduled for later this year.
AMERICAN SCIENTISTS plan to land a sundial on Mars so that people can monitor the Martian day via the Internet. The sundial will reach Mars in January 2002, carried on board Nasa's Mars Surveyor spacecraft, and is expected to be positioned near its equator. Much of the fabrication is being done at Arizona State University. The parts will be returned to the University of Washington in Seattle for final assembly, and the sundial is to be delivered to Nasa's Jet Propulsion Laboratory in Pasadena later this year.
This first extraterrestrial sundial will monitor the movements of a shadow over a Martian year, which is twice as long as Earth's. Mars's seasons are exaggerated - the planet's orbit is far more elliptical than that of Earth - so shadows vary greatly in length.
ReviewThese heroes in a half shell should have been left in hibernation
Sek, k'athjilari! (That’s “yes, definitely” to non-native speakers).TV
Arts & Ents blogs
- 1 Jack the Ripper: Scientist who claims to have identified notorious killer has 'made serious DNA error'
- 2 Banksy arrest hoax: Internet duped by fake report claiming the street artist's identity has been revealed
- 3 Are you ready for Crazy Doritos, the red-hot snack food craze sweeping Mexico’s streets?
- 4 Drink alcohol and eat meat to improve male fertility - but cut down on coffee, studies suggest
- 5 Former East 17 frontman Brian Harvey turns up at Downing Street and 'demands to speak to Prime Minister'
Breaking Bad season 6 is still not happening
Doctor Who, Flatline - review: Clara isn’t half bad as the Time Lord
Downton Abbey review series 5, episode 5: Period drama falls disappointingly flat
Star Wars memorabilia called a 'bit of plastic' on Antiques Roadshow by Fiona Bruce valued at £50,000
Fury, film review: Brad Pitt gives intriguing performance as unsympathetic war hero
Cameron is warned 'no possibility' of UK reducing immigration and that bid to bring in quota on migrant workers would be illegal
Residents should throw a street party and mix with immigrant neighbours, councils told
Russell Brand threatened with arrest after filming outside Fox News headquarters
London bus driver 'kicks gay couple off for kissing'
Amal Alamuddin calls for the return of the Elgin Marbles from Britain: 'Injustice has persisted for too long'
Lord Freud: Tory welfare minister apologises after saying disabled people are 'not worth’ the minimum wage