How Planets Form: &#39;It&#39;s a Mess Out There&#39;
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New observations of dust around young stars suggests collisions of large asteroid-like objects and fledgling planets are frequent.
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NASA's Spitzer Space Telescope has spotted a dusty disc of material around a very small "failed star" called a brown dwarf, raising the possibility that there may be miniature solar systems in which planets orbit objects not much larger than planets, scientists said Monday.
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Imagine our sun snatching an alien planet from another solar system, four billion years ago. A team of scientists, including a Utah physicist, say it&#39;s a possibility based on a wild new simulation.
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Astronomers suspect the early Earth was a very harsh place. Temperatures were extreme, and the planet was constantly bombarded by cosmic debris. Many scientists believe that life's starting materials, or building blocks, must have been very resilient to have survived this tumultuous environment.
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Lagos - An item has appeared in the Universe Today, Space News from Around the Internet that the NASA&#39;s Galaxy Evolution Explorer has discovered baby galaxies forming in our relative neighborhood, casting doubt on the theory that only small galaxies were
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The collisions that spawn planets are bigger and take place over longer periods of time than previously thought, say astronomers who studied nearly 300 stars with NASA&#39;s Spitzer Space Telescope.
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This animation illustrates a massive collision between rocky, embryonic planets as big as mountain ranges. Such collisions form the basis of the planet-building process.
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AUSTIN, Texas &mdash; An extrasolar planet about one-fourth the heft of Jupiter might have formed from the collision and merger of two planets, astronomers announced today.
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Objects in the Kuiper Belt - the region beyond Pluto&#39;s orbit where many comets originate - may be much smaller than astronomers thought, according to observations made with NASA&#39;s Spitzer infrared telescope.
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Astronomers said they were baffled about how the planet, located 450 light-years away in the constellation Lacerta, formed and why it appears puffy.
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Suggesting a necessary change to astronomy textbooks, astronomers announced Monday that planets form through a lengthier and more violent series of collisions
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Detailed observations from the first comet samples returned to Earth are debunking some of science's long-held beliefs on how the icy, celestial bodies form.
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Astronomers announce recent discoveries of two Earth-like planets.
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For the first time, scientists have found rings of dust around planet-bearing stars &#151; an important confirmation of theories about how planets form, NASA announced Thursday.
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LOS ANGELES - It may take much longer than scientists have thought for violent turbulence to turn grains of space dust into new planets.    A NASA telescope recently discovered evidence that the most violent part of the process in forming an Earth-sized planet - the collisions between colossal chunks of rock - may last hundreds of millions of years instead of 10 million years, scientists said Monday at NASA's Jet Propulsion Laboratory in Pasadena, Calif...
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US astronomers show that wherever there is room for a planet to form around a young star, it does.
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Cassini&#39;s close fly-by of Titan, Saturn&#39;s largest moon, has left scientists with no clear idea of what to expect when the Huygens probe lands on the alien world, despite the amazingly detailed images they now have of the surface.