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The Comet, the Owl, and the Galaxy

APOD - 2 hours 36 min ago

The Comet, the Owl, and the Galaxy The Comet, the Owl, and the Galaxy

Astronomers identify purest, most massive brown dwarf

Science Daily - 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.

SH2-155: The Cave Nebula

APOD - Fri, 03/24/2017 - 9:07am

 The Cave Nebula SH2-155: The Cave Nebula

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

Science Daily - 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

Science Daily - 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

Science Daily - 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.

Central Cygnus Skyscape

APOD - Thu, 03/23/2017 - 9:07am

Central Cygnus Skyscape Central Cygnus Skyscape

Tracing aromatic molecules in the early Universe

Science Daily - 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

Science Daily - 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

Science Daily - 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

Science Daily - 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.

Fast Stars and Rogue Planets in the Orion Nebula

APOD - Wed, 03/22/2017 - 9:07am

Start with the constellation of Orion. Start with the constellation of Orion.

Looking for signs of the Big Bang in the desert

Science Daily - Tue, 03/21/2017 - 12:39pm
The silence of an immense desolate land in which to search for reverberations coming from the time at which everything began. The Simons Observatory will be built in the Chilean Atacama desert at an altitude of several thousand meters for the purposes of studying primordial gravitational waves which originated in the first instants of the Big Bang.

Comet 67P is constantly undergoing a facelift

Science Daily - Tue, 03/21/2017 - 12:25pm
Changes that the Rosetta spacecraft discovered on the surface of Comet 67P/Churyumov-Gerasimenko, including the collapse of entire cliffs, were likely driven by seasonal events, according to a new study.

Astronomers hazard a ride in a 'drifting carousel' to understand pulsating stars

Science Daily - Tue, 03/21/2017 - 11:03am
What sounds like a stomach-turning ride at an amusement park might hold the key to unraveling the mysterious mechanism that causes beams of radio waves to shoot out from pulsars -- super-magnetic rotating stars in our galaxy.

Breaking the supermassive black hole speed limit

Science Daily - Tue, 03/21/2017 - 11:03am
A new computer simulation helps explain the existence of puzzling supermassive black holes observed in the early universe. The simulation is based on a computer code used to understand the coupling of radiation and certain materials.

Mars volcano, Earth's dinosaurs went extinct about the same time

Science Daily - Tue, 03/21/2017 - 9:27am
Arsia Mons produced one new lava flow at its summit every 1 to 3 million years during the final peak of activity, about 50 million years ago. The last volcanic activity there ceased about 50 million years ago -- around the time of Earth's Cretaceous-Paleogene extinction, when large numbers of our planet's plant and animal species (including dinosaurs) went extinct.

Does Mars have rings? Not right now, but maybe one day

Science Daily - Tue, 03/21/2017 - 9:27am
Researchers have developed a model that suggests that debris that was pushed into space from an asteroid or other body slamming into Mars around 4.3 billion years ago and alternates between becoming a planetary ring and clumping up to form a moon.

Less radiation in inner Van Allen belt than previously believed

Science Daily - Tue, 03/21/2017 - 9:26am
The inner Van Allen belt has less radiation than previously believed, according to a recent study. Observations from NASA's Van Allen probes show the fastest, most energetic electrons in the inner radiation belt are actually much rarer and harder to find than scientists expected. This is good news for spacecraft that are orbiting in the region and can be damaged by high levels of radiation.

The Aurora Tree

APOD - Tue, 03/21/2017 - 9:07am

Yes, but can your tree do this? Yes, but can your tree do this?


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