Quasi-stellar radio source (quasar) is a very energetic and distant galaxy with an active galactic nucleus. They are the most luminous objects in the universe. Quasars were first identified as being highredshift sources of electromagnetic energy, including radio waves and visible light, that were point-like, similar to stars, rather than extended sources similar to galaxies.
Quasars: tueurs ou créateurs de galaxies ?
envoyé par AstrophysiqueTV. - Les derniers test hi-tech en vidéo.
lundi 26 avril 2010
Posted by
The Dreamer
Labels:
Active Galactic Nucleus,
Galaxy,
Quasar,
Radio Waves,
Stars,
Visible Light
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vendredi 31 juillet 2009
Mission: STS-127, 29th station flight
Mission Number: Shuttle flight No. 127
Orbiter: Endeavour (OV-105)
Launch Date: 18:03:10 EDT/22:03:10 UT, July 15, 2009
Launch Pad: 39A
Mission Duration: 16 days
EVAs: TBA
Landing Site: primary site: Kennedy Space Center
Landing: TBA
Inclination/Altitude: 51.6 degrees/122 nautical miles
Primary Payload:
Kibo Japanese Experiment Module Exposed Facility (JEM-EF)
Kibo Japanese Experiment Logistics Module - Exposed Section (ELM-ES)
Integrated Cargo Carrier-Vertical Light Deployable (ICC-VLD)
DRAGONSAT Payload - NASA GPS Demonstrator & Student Satellite with Dual Picosatellites
E-2 Payload - Spherical satellites designed by United States Naval Research Laboratory
Crew: Mission Commander: Mark L. Polansky; Pilot: Douglas G. Hurley; Mission Specialists: Christopher J. Cassidy, Thomas H. Marshburn, David A. Wolf, Julie Payette, launch: Timothy Kopra (Flight Engineer, Expedition 19), landing: Koichi Wakata (Flight Engineer, Expedition 18)
Contingency Shuttle Crew Support Mission: STS-328 (Rescue STS-127) - Atlantis (OV-104).
Mission Number: Shuttle flight No. 127
Orbiter: Endeavour (OV-105)
Launch Date: 18:03:10 EDT/22:03:10 UT, July 15, 2009
Launch Pad: 39A
Mission Duration: 16 days
EVAs: TBA
Landing Site: primary site: Kennedy Space Center
Landing: TBA
Inclination/Altitude: 51.6 degrees/122 nautical miles
Primary Payload:
Crew: Mission Commander: Mark L. Polansky; Pilot: Douglas G. Hurley; Mission Specialists: Christopher J. Cassidy, Thomas H. Marshburn, David A. Wolf, Julie Payette, launch: Timothy Kopra (Flight Engineer, Expedition 19), landing: Koichi Wakata (Flight Engineer, Expedition 18)
Contingency Shuttle Crew Support Mission: STS-328 (Rescue STS-127) - Atlantis (OV-104).
Mission STS-127: Space shuttle Endeavour and its crew of seven astronauts are wrapping up their mission to the International Space Station. Launch occurred on time at 6:03 p.m. EDT on Wednesday, July 15 from NASA's Kennedy Space Center in Florida.
Endeavour is due to return to Earth today with a late-morning touchdown on Kennedy's Shuttle Landing Facility.
Endeavour is due to return to Earth today with a late-morning touchdown on Kennedy's Shuttle Landing Facility.
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