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Einstein ring helps weigh a black hole
Astronomers have "weighed" only the nearest supermassive black holes. Now, with a gravity lens and Einstein ring, they've weighed one 12 billion light-years away.
October 3, 2015
Best yet images of Pluto’s moon Charon
Beautiful and fascinating images from the New Horizons spacecraft reveal the large moon’s violent history.
October 2, 2015
India launches its first astronomy satellite
India has reached for the stars with a successful launch of its first astronomy satellite. ASTROSAT carries India's version of the Hubble Space Telescope.
September 28, 2015
Evidence of flowing water on Mars
Mars is a desert world, but it's not completely dry. Scientists have found liquid water flowing on Mars.
September 28, 2015
Intriguing cycle of close and far moons
This post explains lunar perigee - the moon's closest point to Earth - and includes dates of all closest and farthest moons for each month of 2015.
September 27, 2015
How to watch tonight’s eclipse online
On the wrong part of Earth for tonight's eclipse? Clouded out? Here are links to online viewing.
September 27, 2015
Rosetta’s comet has daily water-ice cycle
"We found a mechanism that replenishes the surface of the comet with fresh ice at every rotation. This keeps the comet 'alive'," said a researcher.
September 25, 2015
Milky Way’s black hole is more active!
The black hole at the Milky Way's heart recently blasted out 10 times its normal rate of X-ray flares. Is it due to the close passage of a mysterious, dusty object?
September 25, 2015
Supersonic stars reveal Milky Way’s heart
Harvard astronomers want to examine the radio waves from supersonic stars at the Milky Way's core, to learn more about this hidden region of space.
September 25, 2015
This date in science: India and Mars
Mars Orbiter Mission (MOM) is India's first interplanetary mission. It began orbiting Mars a year ago today. Mission goals - and spectacular images - here.
September 24, 2015
