Space
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PlanetsLike Tatooine in ‘Star Wars,’ this planet has two suns
Scientists have found the tenth planet with two suns. Such planets might be more common than single-sun planets, like our own, a new survey suggests.
By Ilima Loomis -
PhysicsStephen Hawking says his group has solved a black hole puzzle
Physicist Stephen Hawking says light sliding along the outside of a black hole holds the key to understanding what’s inside.
By Andrew Grant -
PhysicsFade to black? The universe is in decline
One of the largest sky surveys ever made has found that the universe is in decline. And after losing even more energy over the next 100 billion years, it will be dark, empty and boring.
By Ilima Loomis -
PlanetsScientists Say: Exoplanet
Eight planets orbit our sun. We give a slightly different name to the millions of similar bodies orbiting other stars.
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PlanetsNews Brief: Venus may have active volcanoes
The Venus Express spacecraft detected flashes of infrared light that may be from hot lava erupting from active volcanoes.
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PhysicsProfile: Looking for life beyond the solar system
Planetary scientist and astrophysicist Sara Seager is a leader in the search for signs of life on planets beyond our solar system.
By Ron Cowen -
PlanetsPluto hosts ice mountains, data suggest
Geologic activity appears to have been reshaping Pluto, erasing craters and more.
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PlanetsPicture This: Pluto hearts us
As a little spacecraft flies by Pluto, it is snapping up high resolution images and collecting unparalleled data.
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SpaceNews Brief: Latest supernova is also super-brightest
The light from stellar fireworks in a galaxy far, far away has just reached Earth. It comes from a star that exploded in a massively bright flash.
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PlanetsScientists Say: Satellite
When we think of satellites, we often think of objects we send into space from Earth. But most satellites are actually all natural.
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PlanetsHello, Pluto!
Here's a collection of our stories about your favorite dwarf planet — including those on the New Horizons flyby.
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PlanetsVisiting Pluto
Pluto has long been little more than a dark spot in the sky. Now NASA’s New Horizons spacecraft is about to fly by this dwarf planet. Along the way, it will collect unprecedented data on it.