Results tagged “astronomy”

Hubble Sees Anemic Spiral NGC 4921

How far away is spiral galaxy NGC 4921? Although presently estimated to be about 310 million light years distant, a more precise determination could be coupled with its known recession speed to help humanity better calibrate the expansion rate of the entire visible universe.

Hot Gas Sloshing in a Galactic Cauldron

Galaxies are social beasts that are mostly found in groups or clusters - large assemblies of galaxies that are permeated by even larger amounts of diffuse gas.

NASA's Hubble Space Telescope has revealed the first visual evidence of how our home galaxy, the Milky Way, assembled itself into the majestic pinwheel of stars we see today.

Stellar Explosions in NGC 6984

Supernovae are intensely bright objects. They are formed when a star reaches the end of its life with a dramatic explosion, expelling most of its material out into space.

3C 397 (also known as G41.1-0.3) is a Galactic supernova remnant with an unusual shape. Researchers think its box-like appearance is produced as the heated remains of the exploded star -- detected by Chandra in X-rays (purple) -- runs into cooler gas surrounding it.

NGC 3576: Glowing Gas in the Milky Way

A region of glowing gas in the Sagittarius arm of the Milky Way galaxy, NGC 3576 is located about 9,000 light years from Earth.

3C353: Giant Plumes of Radiation

Jets generated by supermassive black holes at the centers of galaxies can transport huge amounts of energy across great distances. 3C353 is a wide, double-lobed source where the galaxy is the tiny point in the center and giant plumes of radiation can be seen in X-rays from Chandra (purple) and radio data from the Very Large Array (orange).

Most of the universe's heavy elements, including the iron central to life itself, formed early in cosmic history and spread throughout the universe, according to a new study of the Perseus Galaxy Cluster using Japan's Suzaku satellite.

X-ray Images of Sagittarius A*

Researchers have found evidence that the normally dim region very close to the supermassive black hole at the center of the Milky Way galaxy flared up with at least two bright outbursts in the past few hundred years.

ESA's Planck space telescope has been turned off after nearly 4.5 years soaking up the relic radiation from the Big Bang and studying the evolution of stars and galaxies throughout the Universe's history.

A paper in today's issue of the journal Science [18 October] pits the front-running ideas about the growth of supermassive black holes against observational data -- a limit on the strength of gravitational waves from pairs of black holes, obtained with CSIRO's 64-m (210-ft) Parkes radio telescope in eastern Australia.

Using data from NASA's Kepler space telescope, an international team of astronomers has discovered a distant planetary system featuring multiple planets orbiting at a severe tilt to their host star.

A team of researchers including Carnegie's Mansi Kasliwal and John Mulchaey used a novel astronomical survey software system -- the intermediate Palomar Transient Factory (iPTF) -- to link a new stripped-envelope supernova, named iPTF13bvn, to the star from which it exploded.

An international team of astronomers has observed part of the final death throes of the largest known star in the universe as it throws off its outer layers. The discovery, by a collaboration of scientists from the UK, Chile, Germany and the USA, is a vital step in understanding how massive stars return enriched material to the interstellar medium -- the space between stars -- which is necessary for forming planetary systems.

Hubble's View of Galaxy NGC 3621

This Hubble Picture of the Week is dedicated to the over 200 000 Facebook fans of ESA/Hubble, who share our passion for the NASA/ESA Hubble Space Telescope and the discoveries it brings.

Galactic Bubble

Nestled within the shell around this large bubble is an embryonic star that is already a hefty eight times more massive than our Sun.

A large hot molecular cloud around a very young star was discovered by ALMA. This hot cloud is about ten times larger than those found around typical solar-mass baby stars, which indicates that the star formation process has more diversity than ever thought. This result was published in Astrophysical Journal Letters on 20 September 2013.

Astronomers have detected cold streams of primordial hydrogen, vestigial matter left over from the Big Bang, fueling a distant star-forming galaxy in the early universe. Profuse flows of gas onto galaxies are believed to be crucial for explaining an era 10 billion years ago, when galaxies were copiously forming stars.

Magnetic Field May Shape 'Blooming' Star

An old star, IRAS 15445-5449, has begun to push out a jet of charged particles that glow with radio waves. A few old stars are known to have jets, "but this is the first one where the radio waves tell us the jet is held together by a strong magnetic field", said Dr Jessica Chapman of CSIRO Astronomy and Space Science, a member of the research team.

Dating Our Galaxy's Dormant Volcano

A dormant volcano -- a supermassive black hole -- lies at the heart of our galaxy. Fresh evidence suggests that it last erupted two million years ago. Astronomers have long suspected such an outburst occurred, but this is the first time they've been able to date it.

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