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Updated: 15 hours 21 min ago

Satellite galaxies at edge of Milky Way coexist with dark matter

Thu, 03/30/2017 - 4:49pm
New research rules out a challenge to the accepted standard model of the universe and theory of how galaxies form by shedding new light on a problematic structure.

Not a pipe dream anymore. Space-farming: A long legacy leading us to Mars

Thu, 03/30/2017 - 3:39pm
Research into space farming has resulted in numerous Earth-based advances (e.g., LED lighting for greenhouse and vertical farm applications; new seed potato propagation techniques, etc.) There are still many technical challenges, but plants and associated biological systems can and will be a major component of the systems that keep humans alive when we establish ourselves on the Moon, Mars and beyond.

Waves on sun give NASA new insight into space weather forecasting

Thu, 03/30/2017 - 2:22pm
New research has uncovered a mechanism, similar to one that occurs on Earth, which may allow new insights into forecasting space weather and activity on the sun.

Solar wind stripped Martian atmosphere away

Thu, 03/30/2017 - 2:22pm
Solar wind and radiation are responsible for stripping the Martian atmosphere, transforming Mars from a planet that could have supported life billions of years ago into a frigid desert world, according to new results.

Mysterious cosmic explosion surprises astronomers studying the distant x-ray universe

Thu, 03/30/2017 - 1:24pm
A mysterious flash of X-rays has been discovered by NASA's Chandra X-ray Observatory in the deepest X-ray image ever obtained. This source likely comes from some sort of destructive event, but it may be of a variety that scientists have never seen before.

Search for stellar survivor of a supernova explosion

Thu, 03/30/2017 - 1:23pm
Astronomers have used the NASA/ESA Hubble Space Telescope to observe the remnant of a supernova explosion in the Large Magellanic Cloud. Beyond just delivering a beautiful image, Hubble may well have traced the surviving remains of the exploded star's companion.

Explaining the accelerating expansion of the universe without dark energy

Thu, 03/30/2017 - 11:52am
Enigmatic dark energy, thought to make up 68% of the universe, may not exist at all, according to a Hungarian-American team. The researchers believe that standard models of the universe fail to take account of its changing structure, but that once this is done the need for dark energy disappears.

Speeding star gives new clues to breakup of multi-star system

Thu, 03/30/2017 - 11:49am
Three stars have been discovered that now hold the record as the youngest-known examples of a super-fast star category.

Astronomers probe swirling particles in halo of starburst galaxy

Mon, 03/27/2017 - 4:49pm
Astronomers have used a radio telescope in outback Western Australia to see the halo of a nearby starburst galaxy in unprecedented detail.

Stars born in winds from supermassive black holes

Mon, 03/27/2017 - 11:46am
Observations using ESO's Very Large Telescope have revealed stars forming within powerful outflows of material blasted out from supermassive black holes at the cores of galaxies. These are the first confirmed observations of stars forming in this kind of extreme environment. The discovery has many consequences for understanding galaxy properties and evolution.

Planetary waves, first found on Earth, are discovered on sun

Mon, 03/27/2017 - 11:44am
The same kind of large-scale planetary waves that meander through the atmosphere high above Earth's surface may also exist on the sun, according to a new study.

NASA spacecraft investigate clues in radiation belts

Mon, 03/27/2017 - 11:42am
NASA's Van Allen Probes uncover new phenomena in our near-Earth environment with their unique double orbit. Recently, the spacecraft were in just the right place, at just the right time, to catch an event caused by the fallout of a geomagnetic storm as it happened.

Astronomers identify purest, most massive brown dwarf

Fri, 03/24/2017 - 10:49am
Astronomers have identified a record breaking brown dwarf (a star too small for nuclear fusion) with the 'purest' composition and the highest mass yet known. The object, known as SDSS J0104+1535, is a member of the so-called halo -- the outermost reaches -- of our galaxy, made up of the most ancient stars.

Milky Way-like galaxies in early universe embedded in 'super halos'

Thu, 03/23/2017 - 2:14pm
Astronomers have directly observed a pair of Milky Way-like galaxies seen when the universe was only eight percent of its current age. These progenitors of today's giant spiral galaxies are surrounded by 'super halos' of hydrogen gas that extend many tens-of-thousands of light-years beyond their dusty, star-filled disks.

Gravitational wave kicks monster black hole out of galactic core

Thu, 03/23/2017 - 1:26pm
Astronomers have uncovered a supermassive black hole that has been propelled out of the center of the distant galaxy 3C 186. The black hole was most likely ejected by the power of gravitational waves.

Astronomers find unexpected, dust-obscured star formation in distant galaxy

Thu, 03/23/2017 - 12:54pm
Pushing the limits of the largest single-aperture millimeter telescope in the world, and coupling it with gravitational lensing, astronomers report that they have detected a surprising rate of star formation, four times higher than previously detected, in a dust-obscured galaxy behind a Frontier Fields cluster.

Tracing aromatic molecules in the early Universe

Wed, 03/22/2017 - 3:27pm
A molecule found in car engine exhaust fumes that is thought to have contributed to the origin of life on Earth has made astronomers heavily underestimate the amount of stars that were forming in the early Universe, a study has found. That molecule is called polycyclic aromatic hydrocarbon. On Earth it is also found in coal and tar. In space, it is a component of dust.

Fledgling stars try to prevent their neighbors from birthing planets

Wed, 03/22/2017 - 11:09am
Stars don't have to be massive to evaporate material from around nearby stars and affect their ability to form planets, a new study suggests.

Universe's ultraviolet background could provide clues about missing galaxies

Wed, 03/22/2017 - 9:24am
Astronomers have developed a way to detect the ultraviolet background of the universe, which could help explain why there are so few small galaxies in the cosmos.

Comet 67P full of surprises: Growing fractures, collapsing cliffs and rolling boulders

Wed, 03/22/2017 - 9:22am
Images returned from the European Space Agency's Rosetta mission indicate the surface of comet 67P/Churyumov-Gerasimenko was a very active place during its most recent trip through the solar system, says a new study.