ScienceDaily: Top Science News |
- Astronomers find massive supply of gas around modern galaxies
- NASA rules out Earth impact in 2036 for asteroid Apophis
- How to treat heat like light: New approach using nanoparticle alloys allows heat to be focused or reflected just like electromagnetic waves
- Biggest structure in universe: Large quasar group is 4 billion light years across
| Astronomers find massive supply of gas around modern galaxies Posted: 11 Jan 2013 11:39 AM PST Galaxies have a voracious appetite for fuel -- in this case, fresh gas -- but astronomers have had difficulty finding the pristine gas that should be falling onto galaxies. Now, scientists have provided direct empirical evidence for these gas flows using new observations from the Hubble Space Telescope. |
| NASA rules out Earth impact in 2036 for asteroid Apophis Posted: 11 Jan 2013 10:35 AM PST NASA scientists at the agency's Jet Propulsion Laboratory in Pasadena, Calif., effectively have ruled out the possibility the asteroid Apophis will impact Earth during a close flyby in 2036. The scientists used updated information obtained by NASA-supported telescopes in 2011 and 2012, as well as new data from the time leading up to Apophis' distant Earth flyby Jan. 9, 2013. |
| Posted: 11 Jan 2013 06:27 AM PST A new technique provides a new way of manipulating heat, allowing it to be controlled much as light waves can be manipulated by lenses and mirrors. |
| Biggest structure in universe: Large quasar group is 4 billion light years across Posted: 11 Jan 2013 06:25 AM PST Astronomers have found the largest known structure in the universe. The large quasar group (LQG) is so large that it would take a vehicle traveling at the speed of light some 4 billion years to cross it. Quasars are the nuclei of galaxies from the early days of the universe that undergo brief periods of extremely high brightness that make them visible across huge distances. These periods are 'brief' in astrophysics terms but actually last 10-100 million years. |
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