HD 20794d orbits its star with two other super-Earth planets, designated b and c ... search the data and pick out an exoplanet's faint radial velocity signal from the background noise. YARARA proved ...

Did you know that stars are so far from our solar system that constellations would look the same if we were to view them from other planets? Learn more with our fun facts of the day!

In fact, it takes Jupiter 12 Earth-years to complete one orbit. So it can be seen slowly moving across the entire night sky with respect to the background stars—and it’s therefore Earth’s ...

For centuries, planets beyond our solar system—called exoplanets—existed only in theory and science fiction. It seemed nearly impossible to detect planets light-years away, since the ...

With each passing night as, the crescent slowly widens and it begins to appear against a progressively darker background, its ...

Just a sugar cube of neutron star matter would weigh about one hundred million tons on Earth. A neutron star's almost incomprehensible density causes protons and electrons to combine into neutrons ...

Hubble, with its sharp imaging capabilities, detected more than 200 million stars in the Andromeda galaxy that are brighter than Earth's sun ... within the galaxy, background galaxies seen ...

When Earth is the closest it gets to a planet ... retrograde motion right now—going backward with respect to the background stars—which it always does around the time of its once-every ...

One planet is 30% larger than Earth and orbits its star in less than three days. The other is 70% larger than the Earth and might host a deep ocean. These two exoplanets are super-Earths more ...