ScienceDaily: Cosmic Rays News |
- Hubble monitors supernova in nearby galaxy M82
- How small cosmic seeds grow into big stars
- Glimmer of light in the search for dark matter
- How did the universe begin? Hot Big Bang or slow thaw?
| Hubble monitors supernova in nearby galaxy M82 Posted: 26 Feb 2014 11:45 AM PST Astronomers have taken a Hubble Space Telescope composite image of a supernova explosion designated SN 2014J in the galaxy M82. At a distance of approximately 11.5 million light-years from Earth it is the closest supernova of its type discovered in the past few decades. The explosion is categorized as a Type Ia supernova, which is theorized to be triggered in binary systems consisting of a white dwarf and another star -- which could be a second white dwarf, a star like our sun, or a giant star. |
| How small cosmic seeds grow into big stars Posted: 26 Feb 2014 04:49 AM PST New images provide the most detailed view yet of stellar nurseries within the Snake nebula. These images offer new insights into how cosmic seeds can grow into massive stars. Stretching across almost 100 light-years of space, the Snake nebula is located about 11,700 light-years from Earth in the direction of the constellation Ophiuchus. |
| Glimmer of light in the search for dark matter Posted: 26 Feb 2014 04:48 AM PST Astrophysicists may have identified a trace of dark matter that could signify a new particle: the sterile neutrino. Another research group reported a very similar signal just a few days before. |
| How did the universe begin? Hot Big Bang or slow thaw? Posted: 25 Feb 2014 08:19 AM PST Did the universe begin with a hot Big Bang or did it slowly thaw from an extremely cold and almost static state? A physicist has developed a theoretical model that complements the nearly 100-year-old conventional model of cosmic expansion. According to the new theory, the Big Bang did not occur 13.8 billion years ago -- instead, the birth of the universe stretched into the infinite past. This view holds that the masses of all particles constantly increase. The scientist explains that instead of expanding, the universe is shrinking over extended periods of time. |
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