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Our Star
The sun is a star, a hot ball of glowing gases at the heart of our solar system. Its influence extends far beyond the orbits of distant Neptune and Pluto. Without the sun's intense energy and heat, there would be no life on Earth. And though it is special to us, there are billions of stars like our sun scattered across the Milky Way galaxy.

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WHAT'S UP? Comet ISON and Things that go bump in the night
WHAT'S UP? Comet ISON and Things that go bump in the night
Once there were things in the sky that could not be predicted and were cause for great concern and fear. Now we know better.Read More...
Solar System's Youth Gives Clues to Planet Search
Solar System's Youth Gives Clues to Planet Search
Modeling results show where the injected gas and dust ended ups only 34 years after being injected at the disk's surface. It was injected 9 astronomical units from the central prostar and is now in the disk's midplane.Read More...
The Sun's Magnetic Field is about to Flip
The Sun's Magnetic Field is about to Flip
Something big is about to happen on the sun. According to measurements from NASA-supported observatories, the sun's vast magnetic field is about to flip.Read More...
Prime Time for PANSTARRS
Prime Time for PANSTARRS
This week is prime time for observing this comet. (Next opportunity, the year 108,013 +/- a few hundred or thousand years.)Read More...
Comet of the Century?
Comet of the Century?
Later this year, "Comet ISON" could blossom into a striking naked eye object visible even in broad daylight.Read More...
Earth at Perihelion
Earth at Perihelion
In January, our planet made its annual closest approach to the sun. But don't expect things to warm up.Read More...
Big Sun-Diving Comet Discovered
Big Sun-Diving Comet Discovered
Dr. Tony Phillips reports on his personal website -- spaceweather.com -- about a newly-discovered comet that may buzz the sun next year.Read More...
ISS Transit of Venus
ISS Transit of Venus
High above Earth, astronaut Don Pettit is preparing to photograph the June 5th Transit of Venus from space itself. The Expedition 31 crew will be the first people in history to see a Venus transit from space.Read More...
Solar Eclipse this Weekend
Solar Eclipse this Weekend
On Sunday, May 20th, the Moon will pass in front of the sun, transforming sunbeams across the Pacific side of Earth into fat crescents and thin rings of light.Read More...
Rubber Chicken Flies into Solar Radiation Storm
Rubber Chicken Flies into Solar Radiation Storm
Launching a rubber chicken into a solar storm might sound strange, but the students had good reason: They're doing an astrobiology project.Read More...
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Previous
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WHAT'S UP? Comet ISON and Things that go bump in the night
WHAT'S UP? Comet ISON and Things that go bump in the night
Once there were things in the sky that could not be predicted and were cause for great concern and fear. Now we know better.Read More...
Solar System's Youth Gives Clues to Planet Search
Solar System's Youth Gives Clues to Planet Search
Modeling results show where the injected gas and dust ended ups only 34 years after being injected at the disk's surface. It was injected 9 astronomical units from the central prostar and is now in the disk's midplane.Read More...
The Sun's Magnetic Field is about to Flip
The Sun's Magnetic Field is about to Flip
Something big is about to happen on the sun. According to measurements from NASA-supported observatories, the sun's vast magnetic field is about to flip.Read More...
Prime Time for PANSTARRS
Prime Time for PANSTARRS
This week is prime time for observing this comet. (Next opportunity, the year 108,013 +/- a few hundred or thousand years.)Read More...
Comet of the Century?
Comet of the Century?
Later this year, "Comet ISON" could blossom into a striking naked eye object visible even in broad daylight.Read More...
Earth at Perihelion
Earth at Perihelion
In January, our planet made its annual closest approach to the sun. But don't expect things to warm up.Read More...
Big Sun-Diving Comet Discovered
Big Sun-Diving Comet Discovered
Dr. Tony Phillips reports on his personal website -- spaceweather.com -- about a newly-discovered comet that may buzz the sun next year.Read More...
ISS Transit of Venus
ISS Transit of Venus
High above Earth, astronaut Don Pettit is preparing to photograph the June 5th Transit of Venus from space itself. The Expedition 31 crew will be the first people in history to see a Venus transit from space.Read More...
Solar Eclipse this Weekend
Solar Eclipse this Weekend
On Sunday, May 20th, the Moon will pass in front of the sun, transforming sunbeams across the Pacific side of Earth into fat crescents and thin rings of light.Read More...
Rubber Chicken Flies into Solar Radiation Storm
Rubber Chicken Flies into Solar Radiation Storm
Launching a rubber chicken into a solar storm might sound strange, but the students had good reason: They're doing an astrobiology project.Read More...
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