News tagged with photosphere
Photosphere
The photosphere of an astronomical object is the region from which externally received light originates. The term itself is derived from Ancient Greek roots, φῶς, φωτός/phos, photos meaning "light" and σφαῖρα/sphaira meaning "sphere", in reference to the fact that it is a spheric surface perceived to emit light. It extends into a star's surface until the gas becomes opaque, equivalent to an optical depth of approximately 2/3. In other words, a photosphere is the deepest region of a luminous object, usually a star, that is transparent to photons of certain wavelengths.
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NRL's wide-field imager selected for Solar Probe Plus mission
NASA has chosen the Naval Research Laboratory's Wide-field Imager to be part of the Solar Probe Plus mission slated for launch no later than 2018. The Solar Probe Plus, a small car-sized spacecraft will plunge ...
Space & Earth / Space Exploration
Sep 29, 2010 |
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The rhythm of our star
When we look at the Sun we cannot penetrate beyond its outer surface, the photosphere, which emits the photons that make up the radiation we can see. So how can we find out what is inside it?
Feb 15, 2010 |
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MSU scientists to design optics for new solar mission
Montana State University scientists are involved in a new space mission to figure out how energy is transferred through the sun's atmosphere.
Space & Earth / Space Exploration
Aug 31, 2009 |
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MSU scientists to design optics for new solar mission
(PhysOrg.com) -- Montana State University scientists are involved in a new space mission to figure out how energy is transferred through the sun's atmosphere.
Space & Earth / Space Exploration
Jul 24, 2009 |
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Search results for photosphere
The transit of Venus
Many astronomers and members of the public in Britain will be getting up early on the morning of 6 June, so they can see the final Transit of Venus of the 21st century. The Transit, when Venus passes directly ...
Space & Earth / Space Exploration
May 29, 2012 |
4.7 / 5 (3) |
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GREGOR telescope: Zooming in on the sun
(Phys.org) -- Nighttime is the astronomer’s day. After all, anyone wishing to see the stars must wait until it is dark. There is one exception to this rule, however: the sun. Close up, it can be used ...
Space & Earth / Space Exploration
May 10, 2012 |
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Supersonic snowballs in hell: How comets explode, fizzle out, or survive a flight through the Sun's atmosphere
(PhysOrg.com) -- Since the 1980s astronomers have seen thousands of comets falling towards the Sun, most of them too small to survive a close approach, let alone to re-emerge. Until recently no such objects ...
Space & Earth / Space Exploration
Apr 02, 2012 |
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Earth siblings can be different: Chemical clues on the formation of planetary systems
An international team of researchers, with the participation of IAC astronomers, has discovered that the chemical structure of Earth-like planets can be very different from the bulk composition of the Earth. ...
Feb 23, 2012 |
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Study finds 'cool' gas may form and strengthen sunspots
Hydrogen molecules may act as a kind of energy sink that strengthens the magnetic grip that causes sunspots, according to scientists from Hawaii and New Mexico using a new infrared instrument on an old telescope.
Jan 31, 2012 |
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Closest Type Ia supernova in decades solves a cosmic mystery
Type Ia supernovae (SN Ia's) are the extraordinarily bright and remarkably similar "standard candles" astronomers use to measure cosmic growth, a technique that in 1998 led to the discovery of dark energy ...
Dec 14, 2011 |
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Stars: How big is big?
You may have seen one of these astronomical scale picture sequences, where you go from the Earth to Jupiter to the Sun, then the Sun to Sirius – and all the way up to the biggest star we know of VY Canis ...
Dec 12, 2011 |
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The Chandra Carina complex project
(PhysOrg.com) -- The Great Nebula in the constellation of Carina is a massive star-forming complex located about 7.5 thousand light-years away. The main star in the complex, Eta Carinae, shines brightly in ...
May 16, 2011 |
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Watching the birth of a sunspot
(PhysOrg.com) -- Researchers at the University of Central Lancashire have monitored the birth of a sunspot over a period of eight hours using observations from NASA's Solar Dynamics Observatory (SDO). Dr. ...
Space & Earth / Space Exploration
Apr 20, 2011 |
4.7 / 5 (3) |
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Companion stars could cause unexpected X-rays
Many types of main sequence stars emit in the X-ray portion of the spectra. In massive stars, strong stellar winds ripping through the extended atmosphere of the star create X-ray photons. On lower mass stars, ...
Mar 25, 2011 |
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List of search results for photosphere
