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.
Film Leonardo DiCaprio hunts Tom Hardy
Arts & Ents blogs
- 2 Dutch King Willem-Alexander declares the end of the welfare state
- 3 A-level results 2015: UK exam board OCR admits it 'estimates' hundreds of pupils' grades after papers 'go missing'
- 4 Giant Minion terrorises drivers in Ireland as 40ft inflatable blocks busy Dublin road
- 5 'Cool kids' can go on to become losers in later life, study finds
Artist Jamie McCartney: How The Great Wall of Vagina is a stand against 'body fascism'
Cilla Black: Her 12 best songs, from 'Anyone Who Had a Heart' to 'You're My World'
Michael B Jordan and Kate Mara handle excruciatingly awkward and offensive interview questions like pros
Game of Thrones season 6: 'A Song of Ice and Fire should be finished by 1998,' said George R. R. Martin, 'but don't hold your breath'
Sherlock season 4: Benedict Cumberbatch will be 'a lot less brattish' in Victorian special
Is Britain really full up? Are migrants taking our jobs? Leading academic answers the most common anti-immigration claims
Calais Migrant Crisis: Deputy Mayor of Calais labels Cameron's use of 'swarm' as 'racist' and 'ignorant'
Chris Leslie: Jeremy Corbyn's anti-austerity agenda will harm the poor, says Labour shadow Chancellor
Landlords renting properties to illegal immigrants to face up to five years in prison
While we fixate on Calais, the Home Office is quietly deporting dozens of migrants on 'ghost flights'
Calais crisis: The seven claims made about the migrants - and the reality