ScienceDaily: Astronomy News |
- Hi-ho! Astronomers discover seven dwarf galaxies with new telescope
- NASA spacecraft observes further evidence of dry ice gullies on Mars
- Sun-like stars reveal their ages
- Radio-burst discovery deepens astrophysics mystery
- Hubble spots spiral bridge of young stars linking two ancient galaxies
- New window into high-energy processes on the sun
| Hi-ho! Astronomers discover seven dwarf galaxies with new telescope Posted: 10 Jul 2014 03:36 PM PDT Meet the seven new dwarf galaxies. Astronomers, using a new type of telescope made by stitching together telephoto lenses, recently discovered seven celestial surprises while probing a nearby spiral galaxy. The previously unseen galaxies may yield important insights into dark matter and galaxy evolution, while possibly signaling the discovery of a new class of objects in space. |
| NASA spacecraft observes further evidence of dry ice gullies on Mars Posted: 10 Jul 2014 03:30 PM PDT Repeated high-resolution observations made by NASA's Mars Reconnaissance Orbiter (MRO) indicate the gullies on Mars' surface are primarily formed by the seasonal freezing of carbon dioxide, not liquid water. The first reports of formative gullies on Mars in 2000 generated excitement and headlines because they suggested the presence of liquid water on the Red Planet, the eroding action of which forms gullies here on Earth. Mars has water vapor and plenty of frozen water, but the presence of liquid water on the neighboring planet, a necessity for all known life, has not been confirmed. |
| Sun-like stars reveal their ages Posted: 10 Jul 2014 10:10 AM PDT A new technique for measuring the age of a star using its spin -- gyrochronology -- is coming into its own. Today astronomers are presenting the gyrochronological ages of 22 sun-like stars. Before this, only two sun-like stars had measured spins and ages. |
| Radio-burst discovery deepens astrophysics mystery Posted: 10 Jul 2014 08:15 AM PDT The discovery of a split-second burst of radio waves by scientists using the Arecibo radio telescope in Puerto Rico provides important new evidence of mysterious pulses that appear to come from deep in outer space. Exactly what may be causing such radio bursts represents a major new enigma for astrophysicists. |
| Hubble spots spiral bridge of young stars linking two ancient galaxies Posted: 10 Jul 2014 07:14 AM PDT NASA's Hubble Space Telescope has photographed an unusual structure 100,000 light-years long, which resembles a corkscrew-shaped string of pearls and winds around the cores of two colliding galaxies. The unique structure of the star spiral may yield new insights into the formation of stellar superclusters that result from merging galaxies and gas dynamics in this rarely seen process. |
| New window into high-energy processes on the sun Posted: 09 Jul 2014 03:22 PM PDT Understanding the sun from afar isn't easy. NASA's MESSENGER spacecraft -- which orbits Mercury, and so is as close as 28 million miles from the sun versus Earth's 93 million miles -- is near enough to the sun to detect solar neutrons that are created in solar flares. |
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