News tagged with star system

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Iron-rich stars host shorter-period planets

Astronomers with the Sloan Digital Sky Survey (SDSS) have learned that the chemical composition of a star can exert unexpected influence on its planetary system—a discovery made possible by an ongoing SDSS survey of stars ...

dateJan 10, 2018 in Astronomy
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Planets around other stars are like peas in a pod

An international research team led by Université de Montréal astrophysicist Lauren Weiss has discovered that exoplanets orbiting the same star tend to have similar sizes and a regular orbital spacing. This pattern, revealed ...

dateJan 09, 2018 in Astronomy
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Orbital mayhem around a red dwarf

In the collective imagination, planets of a solar system all circle in the equatorial plane of their star. The star also spins, and its spin axis is aligned with the spin axes of the planetary orbits, giving the impression ...

dateDec 18, 2017 in Astronomy
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Dusty protoplanetary disks

Planetary systems form out of disks of gas and dust around young stars. How the formation proceeds, however, is complex and poorly understood. Many physical processes are involved including accretion onto the star, photoevaporation ...

dateDec 08, 2017 in Astronomy
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How multiple star systems evolve

Sirius is not a single star at all, but a binary system of two stars. Polaris, the north star, is actually a system of three stars. And Castor, in the constellation of Gemini, actually consists of a whopping six stars. Current ...

dateNov 01, 2017 in Astronomy
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Giant exoplanet hunters: Look for debris disks

There's no map showing all the billions of exoplanets hiding in our galaxy—they're so distant and faint compared to their stars, it's hard to find them. Now, astronomers hunting for new worlds have established a possible ...

dateOct 11, 2017 in Astronomy
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