|| Home. | Universe Galaxies And Stars Archives. | |
|| Universe | Big Bang | Galaxies | Stars | Solar System | Planets | Hubble Telescope | NASA | Search Engine ||
Galaxies and supermassive black holes.
The Japanese space agency JAXA announced the successful launch of the ASTRO-E2 X-ray satellite on Sunday. A Japanese-built M-5 rocket blasted off from the Uchinoura Space Center carrying the Astro-E2 into orbit. This satellite, renamed Suzuka, is a replacement for the Astro-E satellite, which was destroyed because of a launch failure in 2000. Once it's operational, Suzuka will help Astronomers understand the evolution of Galaxies and the supermassive black holes at their centres.
One of the instruments tuned into Deep Impact is NASA's Swift satellite, normally designed to detect and analyze gamma ray bursts. Swift has been watching the expanding debris cloud, and detected increasing numbers of X-rays every day. This has enabled scientists to accurately measure the total amount of material released. So far, it appears that several tens of thousands of tonnes of debris were blasted off the Comet into space; enough to bury a football field under 9 metres (30 feet) of dust.
Of the 130 extrasolar planets discovered to date, most have been found using the radial velocity method, where a planet causes tiny changes to a star's velocity compared to the Earth. This back and forth motion changes the wavelength of the light from our perspective. Another method, the transit method, has turned up 6 planets so far, and should find many more in the coming years. It works by watching for a star to dim slightly on a regular basis as a planet passes in between us and the star.
When Deep Impact's impactor slammed into Comet Tempel 1 on July 4, 2005, it released a tremendous cloud of fine powdery material from the comet's nucleus. scientists are still studying the volumes of data acquired by Deep Impact, but it appears this plume was much brighter than anyone had expected; its surface was more like talcum powder than sand. The crater was probably on the large side of what was being predicted: 50 - 250 metres (165 - 820 feet).
Go To Print Article
Universe - Galaxies and Stars: Links and Contacts
|| GNU License | Contact | Copyright | WebMaster | Terms | Disclaimer | Top Of Page. ||