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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.

Deborah Byrd

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.

Deborah Byrd

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.

Bruce McClure

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.

Deborah Byrd

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.

Deborah Byrd

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?

Deborah Byrd

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.

Deborah Byrd

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.

Eleanor Imster

Deborah Byrd

September 24, 2015