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Image returned by Mars Science Laboratory Curiosity. Sol 1,174: Wednesday November 25, 2015.  The images on this page are from the rover's wide-angle NavCams (Navigational Cameras), which shoot in black-and-white.
Science Wire | Nov 27, 2015

Amazing new images from Mars rover

Awesome views, including some selfies, from the Mars Curiosity rover. The rover is looking across Gale Crater, approaching a large dune with ripples.

Science Wire | Nov 27, 2015

Video: EarthSky News with Deborah Byrd

Catch up with all the news you can fit into outer space with EarthSky.org’s Deborah Byrd, LIVE on Slooh Wednesdays at 4 PM ET (2100 UTC). Or watch right here!

This illustration shows Earth surrounded by filaments of dark matter called 'hairs,' proposed in a study in the Astrophysical Journal by Gary Prézeau of NASA's Jet Propulsion Laboratory, Pasadena, California. Read more about this image.
Science Wire | Nov 27, 2015

Does Earth create dark matter hairs?

Theoretical calculations by a JPL astronomer suggest that streams of dark matter – passing through Earth – would emerge as ultra-dense filaments or “hairs.”

Mars could gain a ring in 10-20 million years when its moon Phobos is torn to shreds by Mars gravity. Image of how Mars might look by Tushar Mittal using Celestia 2001-2010, Celestia Development Team.
Science Wire | Nov 26, 2015

Mars to lose a moon, gain a ring

Mars’ large moon Phobos is slowly falling toward the planet. In 20-40 million years, it’ll shatter, and its pieces will form a Saturn-like ring around Mars.

FAQs | Nov 25, 2015

Is it true that Jupiter protects Earth?

Jupiter’s gravity slings long-period comets out of harm’s way, while nudging some asteroids closer to Earth. And, in 1770, Jupiter took aim on Earth – but missed.

Video still from Blue Origin of the November 23, 2015 successful soft landing of the New Shepard rocket.
Science Wire | Nov 24, 2015

Blue Origin soft-lands a rocket!

And Jeff Bezos, which founded the private spaceflight company, sends his first-ever tweet. Congratulations, Blue Origin!

A composite image - combining x-ray and optical wavelengths - of the Cheshire Cat group of galaxies.  Image via Chandra X-Ray Observatory.
Science Wire | Nov 23, 2015

The Cheshire Cat group of galaxies

A lot of dark matter lies between us and these distant galaxies. Light distortion from gravitational lensing creates the “cat.”

A new image taken by Douglas T. Durig this morning - November 23, 2015. Notice the two tails.
Science Wire | Nov 23, 2015

Comet Catalina has two tails

The comet is up before dawn, getting higher and brighter each morning. An avalanche of pictures is expected this week as it ascends in the predawn sky.

Image via Wikipedia. Sizes of planets are to scale but not the distances. Click here for relative distances.
Science Wire | Nov 22, 2015

When will all five visible planets appear simultaneously?

All five visible planets will appear together in the morning sky early next year – from about January 20 to February 20, 2016. That hasn’t happened since 2005.

A simulation of the dark matter structure in the universe.   This image covers an area of 20 megaparsecs, or about 1.3 billion light-years.  Image via CfA.
Science Wire | Nov 22, 2015

A nearby dark matter galaxy?

Measurements of the velocities of just six stars in a galaxy of only 1,000 visible stars suggest the highest concentration of dark matter of any known galaxy. Holy grail? Or is there another explanation?

Artist's impression of red dwarf star TVLM 513-46546. ALMA observations suggest that it has an amazingly powerful magnetic field (shown by the blue lines), potentially associated with a flurry of solar-flare-like eruptions. Image credit: NRAO/AUI/NSF; Dana Berry / SkyWorks
Science Wire | Nov 20, 2015

Tiny, ultracool star is super stormy

“If we lived around a star like this one, we wouldn’t have any satellite communications. In fact, it might be extremely difficult for life to evolve at all …” said Harvard astrophysicist.

Science Wire | Nov 20, 2015

What makes a halo around the sun or moon?

A ring or circle of light around the sun or moon is called a halo by scientists.

Edwin Hubble 1889-1953
Blogs | This Date in Science | Nov 20, 2015

This date in science: Edwin Hubble and the expanding universe

Hubble helped change our cosmology: our idea of the universe as a whole.

View larger. | Stars wheel around Polaris, above the Hobby-Eberly Telescope at McDonald Observatory in West Texas.  Image via Ethan Tweedle Photography.
Science Wire | Nov 20, 2015

Texas telescope to explore dark energy

A mysterious and largely unknown dark energy is thought to pervade our universe. A telescope in West Texas is poised to survey a million galaxies, to explore it.

body insides
Science Wire | Nov 20, 2015

How a year in space changes bodies

Astronauts are spending a year aboard the International Space Station, and researchers are looking at what happens to their bodies at the molecular level.

Kepler-438b: The planet Kepler-438b is shown here in front of its violent parent star. It is regularly irradiated by huge flares of radiation, which could render the planet uninhabitable. Here the planet’s atmosphere is shown being stripped away. Superflares have energies roughly equal to or greater than 10^33 erg, about 10 times greater than the most powerful solar flare on record. They have been observed with energies up to around 10^36 erg -- some 10,000 times the size of biggest solar flare.  Image credit: Mark A Garlick / University of Warwick
Science Wire | Nov 18, 2015

Most Earthlike exoplanet is uninhabitable

Kepler-438b – 470 light years from Earth – ranks highest on the Earth Similarity Index. But radiation from its violent parent star makes it uninhabitable.

This map shows the route driven by NASA's Curiosity Mars rover from the location where it landed in August 2012 to its location in mid-November 2015, approaching examples of dunes in the "Bagnold Dunes" dune field. Image Credit: NASA/JPL-Caltech/Univ. of Arizona
Science Wire | Nov 17, 2015

Mars rover heads for active dunes

No Mars rover has yet visited a sand dune, as opposed to smaller sand ripples or drifts. Curiosity will visit actual Mars dunes in the next few days.

Regulus, the brightest star in the constellation Leo the Lion, dots a backwards question mark of stars known as the Sickle. If you trace all the Leonid meteors backward, they appear to radiate from this area of the sky. This year, in 2015, the planet Jupiter shines in eastern Leo, not far from the Lion's Tail.
Tonight | Nov 17, 2015

Everything you need to know: Leonid meteor shower

Here are all the details you need for 2015’s Leonid meteor shower, peaking on the morning of November 18.

The supergiant elliptical galaxy M87, with its jet. Astronomers have measured distinct pulsations from this galaxy - the combined light of the pulsating stars within it.
Science Wire | Nov 16, 2015

Astronomers take a galaxy’s pulse

Astronomers had not considered the effect of variable stars on the light of distant galaxies. A new technique lets them measure the galaxies’ “heartbeats.”

Photo by Justin Ng
Tonight | Nov 16, 2015

EarthSky’s meteor shower guide for 2015

The famous Leonid shower is coming up. Follow the links in this post to learn more about meteor showers for the rest of 2015.

Part of the Arecibo radio message beamed to space on November 16, 1974.
This Date in Science | Nov 16, 2015

This date in science: First intentional radio message to space

Anniversary of the first radio message intentionally beamed outward. What do you think? Should we be advertising our presence in space?