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How do astronomers know Jupiter’s mass?
Astronomers use the orbiting moons of Jupiter - largest planet in our solar system - to find Jupiter's mass.
April 21, 2014
7 ways to celebrate International Dark Sky Week
International Dark Sky Week runs April 20-26, 2014. Learn how to help celebrate and preserve the beauty of the night.
April 20, 2014
April 18’s mid-level solar flare
A mid-level flare burst from the sun on April 18. This image, from NASA's Solar Dynamics Observatory. shows the flare as a bright spot on the sun.
April 18, 2014
New image of red nebula 7,300 light-years from Earth
In the middle of little-known nebula Gum 41, brilliant hot young stars are giving off energetic radiation that causes the surrounding hydrogen to glow red.
April 18, 2014
First potentially habitable Earth-sized planet discovered
The first Earth-sized exoplanet orbiting within the habitable zone of another star has been confirmed. The new planet, dubbed Kepler-186f, was discovered using NASA’s Kepler telescope.
April 17, 2014
Did vitamin B3 come from space?
Vitamin B3 - a vitamin essential to metabolism - might have been made in space and delivered to Earth by meteorites.
April 17, 2014
New cross section of the universe
New Hubble image shows objects ranging from cosmic near neighbors to objects seen in the early years of the universe.
April 17, 2014
Cosmic slurp: Where a black hole swallows a star
Astronomers have identified galaxies where a central black hole just disrupted and ‘ate' a star. It's like a black hole putting up a sign that says: Here I am.
April 16, 2014
Large Hadron Collider discovers new form of matter
Researchers say that exotic hadrons -particles made up of two quarks and two anti-quarks - actually exist.
April 15, 2014
A tetrad of lunar eclipses, next one October 8
Monday's eclipse marks the beginning of a special eclipse series known as a tetrad - four total lunar eclipses in a row, with no partial eclipses in between. The next one is October 8.
April 15, 2014
