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.
Glastonbury Roger Daltrey and Pete Townshend will perform with Paul Weller as their warm-up act
Arts & Ents blogs
- 1 Katie Hopkins gives rare glimpse of sensitive side with heartfelt open letter to her children penned in case she dies from epilepsy
- 2 Rihanna's Met Gala dress took one Chinese woman 2 years to make, was reduced to omelette meme in 2 seconds
- 3 Top Gear: Jodie Kidd, Philip Glenister and Guy Martin 'in advanced talks' to replace Jeremy Clarkson and co
- 4 Women think Irish men are the sexiest, survey finds
- 5 Florida couple forced to register as sex offenders for having sex on public beach
Penny Dreadful, series 2 episode 1, review: It is still gloriously silly
Top Gear: Jodie Kidd, Philip Glenister and Guy Martin 'in advanced talks' to replace Jeremy Clarkson and co
Eurovision 2015: What date and time is the song contest and who are the favourites to win?
Indiana Jones sequel confirmed by Lucasfilm - but will Harrison Ford return to the franchise?
How the Other Half Eat, Channel 4 - TV review: Swapping food trolleys shows how food and class are closely connected
In defence of liberal democracy
General Election 2015: Post-election 'shambles' looms as 70 per cent of voters say SNP 'should not be able to veto UK government policies'
The Rothschild Libel: Why has it taken 200 years for an anti-Semitic slur that emerged from the Battle of Waterloo to be dismissed?
General Election 2015: UK will be 'run for the wealthy and powerful' if Tories retain power, Labour warns
General election live: SNP suspends two members for disrupting Labour rally
Schools forced to act as 'miniature welfare states' with teachers buying underwear and even haircuts for poor pupils