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Far, Far Away
Our star and its planets are a tiny part of the Milky Way galaxy. The Milky Way is a huge city of stars, so big that even at the speed of light, it would take 100,000 years to cross it. All the stars in the night sky, including our sun, are just some of the residents of this galaxy. Beyond our own galaxy lies a vast expanse of galaxies.

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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...
How Do We Know When Voyager Reaches Interstellar Space?
How Do We Know When Voyager Reaches Interstellar Space?
Whether and when NASA's Voyager 1 spacecraft, humankind's most distant object, broke through to interstellar space, the space between stars, has been a thorny issue.Read More...
Voyager 1 Approaches Interstellar Space
Voyager 1 Approaches Interstellar Space
Three new papers published in today's issue of Science suggest that Voyager 1, now more than 18 billion kilometers from the sun, is closer to becoming the first human-made object to reach interstellar space.Read More...
Probing the Dark Sector with Euclid
Probing the Dark Sector with Euclid
Dr. Jason Rhodes explains in this lecture the basics of weak lensing and outline some key weak lensing results. He also discusses the European Space Agency's Euclid mission.Read More...
50 Years of Robotic Planetary Exploration: Ashley Stroupe (Robotics Software Engineer / Mars Rover Driver at the Jet Propulsion Laboratory)
50 Years of Robotic Planetary Exploration: Ashley Stroupe (Robotics Software Engineer / Mars Rover Driver at the Jet Propulsion Laboratory)
We asked them and here is what the experts had to say about the last 50 years of planetary robotic exploration.Read More...
50 Years of Robotic Planetary Exploration: Jim Kasting (Distinguished Professor of Geoscience at Penn State University)
50 Years of Robotic Planetary Exploration: Jim Kasting (Distinguished Professor of Geoscience at Penn State University)
We asked them and here is what the experts had to say about the last 50 years of planetary robotic exploration.Read More...
50 Years of Robotic Planetary Exploration: William Borucki (Science Principal Investigator for the Kepler Mission at NASA Ames Research Center)
50 Years of Robotic Planetary Exploration: William Borucki (Science Principal Investigator for the Kepler Mission at NASA Ames Research Center)
We asked them and here is what the experts had to say about the last 50 years of planetary robotic exploration.Read More...
50 Years of Robotic Planetary Exploration: Jeff Cuzzi (Research Scientist at NASA Ames Research Center)
50 Years of Robotic Planetary Exploration: Jeff Cuzzi (Research Scientist at NASA Ames Research Center)
We asked them and here is what the experts had to say about the last 50 years of planetary robotic exploration.Read More...
Kepler Discovers Earth-size Exoplanets
Kepler Discovers Earth-size Exoplanets
NASA's Kepler spacecraft has found two Earth-sized planets orbiting a distant sun-like star.Read More...
 
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...
How Do We Know When Voyager Reaches Interstellar Space?
How Do We Know When Voyager Reaches Interstellar Space?
Whether and when NASA's Voyager 1 spacecraft, humankind's most distant object, broke through to interstellar space, the space between stars, has been a thorny issue.Read More...
Voyager 1 Approaches Interstellar Space
Voyager 1 Approaches Interstellar Space
Three new papers published in today's issue of Science suggest that Voyager 1, now more than 18 billion kilometers from the sun, is closer to becoming the first human-made object to reach interstellar space.Read More...
Probing the Dark Sector with Euclid
Probing the Dark Sector with Euclid
Dr. Jason Rhodes explains in this lecture the basics of weak lensing and outline some key weak lensing results. He also discusses the European Space Agency's Euclid mission.Read More...
50 Years of Robotic Planetary Exploration: Ashley Stroupe (Robotics Software Engineer / Mars Rover Driver at the Jet Propulsion Laboratory)
50 Years of Robotic Planetary Exploration: Ashley Stroupe (Robotics Software Engineer / Mars Rover Driver at the Jet Propulsion Laboratory)
We asked them and here is what the experts had to say about the last 50 years of planetary robotic exploration.Read More...
50 Years of Robotic Planetary Exploration: Jim Kasting (Distinguished Professor of Geoscience at Penn State University)
50 Years of Robotic Planetary Exploration: Jim Kasting (Distinguished Professor of Geoscience at Penn State University)
We asked them and here is what the experts had to say about the last 50 years of planetary robotic exploration.Read More...
50 Years of Robotic Planetary Exploration: William Borucki (Science Principal Investigator for the Kepler Mission at NASA Ames Research Center)
50 Years of Robotic Planetary Exploration: William Borucki (Science Principal Investigator for the Kepler Mission at NASA Ames Research Center)
We asked them and here is what the experts had to say about the last 50 years of planetary robotic exploration.Read More...
50 Years of Robotic Planetary Exploration: Jeff Cuzzi (Research Scientist at NASA Ames Research Center)
50 Years of Robotic Planetary Exploration: Jeff Cuzzi (Research Scientist at NASA Ames Research Center)
We asked them and here is what the experts had to say about the last 50 years of planetary robotic exploration.Read More...
Kepler Discovers Earth-size Exoplanets
Kepler Discovers Earth-size Exoplanets
NASA's Kepler spacecraft has found two Earth-sized planets orbiting a distant sun-like star.Read More...