Category Archives: Astronomy News

Astronomy News

Cleaning up space junk

A mission that will test different methods to clean up space junk is getting ready for launch.

The RemoveDebris spacecraft will attempt to snare a small satellite with a net and test whether a harpoon is an effective garbage grabber.

The probe has been assembled in Surrey and will soon be packed up ready for blast off early next year.

Scientists warn that the growing problem of space debris is putting spacecraft and astronauts at risk.

It is estimated that there are about half a million pieces of man-made rubbish orbiting the Earth, ranging from huge defunct satellites, to spent rocket boosters and nuts and bolts.
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Any collisions can cause a great deal of damage, and generate even more pieces of debris.

The RemoveDebris mission is led by the Surrey Space Centre at the University of Surrey.

The assembly of the spacecraft, which is about the size of a washing machine, has taken place at Surrey Satellite Technology Ltd (SSTL) and is almost complete.

READ MORE–Video and images

Astronomy News

G1-CLASS GEOMAGNETIC STORM PREDICTED

Space Weather News for Nov. 29, 2017
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GEOMAGNETIC STORM PREDICTED (G1-CLASS): NOAA forecasters estimate a 55% chance of G1-class geomagnetic storms on Nov. 29th when Earth’s magnetic field is expected to receive a glancing blow from a CME, hurled toward us days ago by a magnetic explosion on the sun. There’s more: A fissure in the sun’s atmosphere is spewing solar wind into space, and the gaseous material could reach Earth on Nov. 29th as well. G1-class storms have little effect on power grids and satellites. However, they can affect migratory animals that navigate using magnetism. Such storms can also cause spectacular auroras around the Arctic Circle. Visit Spaceweather.com for more information and updates.

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Above: Solar wind is flowing toward Earth from a fissure in the sun’s atmosphere where magnetic fields have opened up, allowing the gaseous material to escape. [Aurora Photo Gallery]

Astronomy News

CRAZY PINK AURORAS

Space Weather News for Nov. 23, 2017
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CRAZY PINK AURORAS: Does Solar Minimum turn auroras pink? Sky watchers around the Arctic Circle are starting to wonder.  For the second winter in a row, unusual pink lights have exploded in the night sky when the sun is blank–no sunspots. Solar wind from the “low activity” sun is producing pink auroras so bright that the Arctic landscape itself is turning pink. Visit Spaceweather.com for pictures of these unusual auroras and more information about the underlying physics.

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Above: On Nov. 22nd, aurora tour guide Marianne Bergli witnessed this surge of pink auroras over Kvaløya, Norway. [Aurora Photo Gallery]
 

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Astronomy News

METEOR EXPLODES OVER THE ARCTIC

A meteoroid exploded over the Arctic Circle on Nov. 16th, wiping out the aurora borealis and turning the midnight sky blue.

Space Weather News for Nov. 17, 2017
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METEOR EXPLODES OVER THE ARCTIC: On the evening of Nov. 16th, a meteoroid ripped through the atmosphere over the Arctic Circle and exploded. The resulting fireball wiped out the aurora borealis, cast shadows, and turned the night sky blue. Visit Spaceweather.com to see a movie of the explosion, captured accidentally by an automated aurora skycam in northern Finland.

SOLAR WIND, INCOMING: Today, a hole in the sun’s atmosphere is facing Earth. The emerging stream of solar wind could reach our planet as early as Nov. 19th, with G1-class geomagnetic storms possible on Nov. 20th. Sign up for free aurora alerts.

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Astronomy News, Dinosaurs

Asteroid impact plunged dinosaurs into catastrophic ‘winter’

Scientists say they now have a much clearer picture of the climate catastrophe that followed the asteroid impact on Earth 66 million years ago.

The outer rim (white arc) of the crater lies under the Yucatan Peninsula itself, but the inner peak ring is best accessed offshore

The event is blamed for the demise of three-quarters of plant and animal species, including the dinosaurs.

The researchers’ investigations suggest the impact threw more than 300 billion tonnes of sulphur into the atmosphere.
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This would have dropped average global temperatures below freezing for several years.

Ocean temperatures could have been affected for centuries. The abrupt change explains why so many species struggled to survive.

“We always thought there was this global winter but with these new, tighter constraints, we can be much more sure about what happened,” Prof Joanna Morgan, from Imperial College London, told BBC News.

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Astronomy News

Hubble reboots Messier Catalogue

Back in the 1940s, Miss Williamson of the Montreal Centre of the RASC, got many enthusiastic star gazers interested in amateur astronomy by challenging them to find all the objects in the Messier Catalogue.  The idea caught on, and is now every astronomer’s first major challenge. In Miss Williamson’s day, there were no GoTo telescopes; the object was to learn your way around the night sky by finding the 110 Messier objects by “Star Hopping“. This is still the way to earn your Messier certificate. I’m more than halfway through, having mostly the Virgo cluster to explore.  More about the Messier Club.

And if they ever publish this Hubble version as a book, I WANTS IT!!!       CPL

Hubble reboots Messier Catalog

NASA used images from the Hubble Space Telescope to create their own version of the Messier catalog.

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By Jake Parks  |  Published: Thursday, October 19, 2017
messier106
For this stunning image of the spiral galaxy M106, multiple exposures from Hubble were combined with ground-based images from the amateur astronomer Robert Gendler. The galaxy was initially discovered in 1781 by Pierre Mechain, Charles Messier’s observing assistant.
Today, NASA published the Hubble Space Telescope’s version of the Messier catalogue, a list of 110 deep-sky objects (including nebulae, star clusters, and galaxies) that French astronomer Charles Messier began almost 250 years ago.

This new reboot of the Messier collection features beautiful Hubble images of 63 deep-sky objects from the original catalog. While astronomy enthusiasts may see some images they have seen before (such as the Pillars of Creation in the Eagle Nebula), the catalog also includes several unpublished images that NASA processed specifically for this project.

Astronomy News

METEORS FROM HALLEY’S COMET

Space Weather News for Oct. 20, 2017
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METEORS FROM HALLEY’S COMET: Earth is entering a stream of debris from Halley’s Comet, source of the annual Orionid meteor shower. Last night, NASA’s network of all-sky meteor cameras detected 23 Orionid fireballs over the USA–a result of comet dust hitting the atmosphere at speeds exceeding 65 km/s (145,000 mph). Forecasters expect the shower to peak on Oct. 21-22 with as many as 25 meteors per hour. Visit Spaceweather.com for observing tips and sky maps.

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Above: An Orionid fireball streaks over the Allegheny Observatory in Pittsburgh on Oct. 20, 2017. Photo credit: NASA’s All-Sky Fireball Network. More images may be found in the Realtime Meteor Photo Gallery.

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Astronomy News

LIGO Detects a Neutron Star Merger

New LIGO discovery is an astronomer’s dream come true.

By Robert Naeye  |  Published: Monday, October 16, 2017

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GW170817cloudc2
On August 17, astronomers detected gravitational waves and a gamma-ray burst from two colliding neutron stars. National Science Foundation/LIGO/Sonoma State University/A. Simonnet

On August 17, Mother Nature delivered a gift to astronomers as precious as anything they could have imagined: gravitational waves from two neutron stars spiraling inward and merging, followed moments later by a burst of gamma rays from the same patch of sky. This cosmic double whammy was officially announced today after nearly two months of rumors. It proves a long-standing theory for an enigmatic class of cosmic cataclysms while heralding a revolutionary new era of multi-messenger astronomy.

The sequence of events started at 8:41 a.m. Eastern time when a train of gravitational waves started rolling through the Virgo detector near Pisa, Italy. The same waves rumbled through the LIGO detector in Livingston, Louisiana, just 22 milliseconds later, then the twin LIGO detector in Hanford, Washington, 3 milliseconds after that.

The LIGO and Virgo instruments detected a crescendo of waves for a whopping 100 seconds — much longer than previous detections. The duration, amplitude, and frequency of the waves had all the characteristics that theorists have expected for a binary system consisting of two neutron stars on a death spiral ending with coalescence. The two neutron stars had masses of about 1.5 and 1.1 solar masses, respectively. About 1 to 2 percent of that mass was likely ejected into space during the merger, which presumably resulted in a black hole of nearly 3 solar masses, although the LIGO data does not prove that a black hole formed. If a black hole indeed formed, it’s the lightest black hole yet known.

Astronomy News

ASTEROID TO BUZZ EARTH THIS WEEK

Space Weather News for Oct. 10, 2017
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ASTEROID TO BUZZ EARTH THIS WEEK: Four years ago, a house-sized asteroid tore through the atmosphere over Chelyabinsk, Russia, and exploded.  Shock waves shattered windows and knocked down onlookers as fragments of the disintegrating space rock peppered the Ural countryside. This week an asteroid about the same size is approaching Earth. It will not hit our planet, but it’s coming very close. On Oct. 12, 2017, the speeding space rock, named “2012 TC4,” will skim just above the zone of Earth’s geosynchronous communications satellites and briefly become a target for amateur telescopes. Learn more about the flyby on today’s edition of Spaceweather.com.

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Above: An artist’s concept of asteroid 2012 TC4 flying past Earth on Oct. 12, 2017.

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Astronomy News

Gravitational Waves in the news

Gravitational wave researchers win Nobel Prize
Three American physicists have won the 2017 Nobel Prize in Physics for their contribution to detecting gravitational waves.

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By Jake Parks  |  Published: Wednesday, October 04, 2017
Winners
Rainer Weiss (left) from MIT, Barry Barish from Caltech, and Kip Thorn from Caltech all shared the 2017 Nobel Prize in Physics.

Yesterday, over a hundred years after Albert Einstein first predicted the existence of gravitational waves, three American physicists won the 2017 Nobel Prize for Physics for their “decisive contribution to the LIGO detector and the observation of gravitational waves.”

Half of this year’s prize went to Rainer Weiss from MIT for his work conceptualizing and constructing the Laser Interferometer Gravitational-wave Observatory (LIGO), while the other half of the prize was split between Kip Thorne and Barry Barish from Caltech, both co-founders of the LIGO/VIRGO Collaboration.

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Scientists catch another gravitational wave, and they know where it came from
By Eric Betz  |  Published: Wednesday, September 27, 2017
virgo

Last year, physicists made history by observing the first-ever gravitational wave. Their discovery confirmed Albert Einstein’s century-old theory of gravity and capped decades of effort to build an instrument sensitive enough to catch these ripples in spacetime.

Since then, researchers working at the government-funded Laser Interferometer Gravitational Wave Observatory (LIGO) — twin detectors in Louisiana and Washington State — have caught several more gravitational waves.

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