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Stephen commented on Doone's group Humans of Earth and a Grotesque Idiot News
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What is an atheists raw perspective on the Bible and God

Doing a research paper, need opinions, please be honest and as detailed as possibleSee More
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The Daily Cosmos or Interesting Facts about the Universe

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The Daily Cosmos or Interesting Facts about the Universe

Cosmology
Astrophysics
Astronomy

Location: #science
Members: 57
Latest Activity: Feb 18

 

Cosmology - Astrophysics - Astronomy

 

Hubble Wallpaper - Awesome Hubble Images

Discussion Forum

Big Bangers' Imaginations Supply Their Story's Only Support.

Started by Tom Sarbeck. Last reply by Joey Daniel Smith Dec 22, 2018. 7 Replies

'Hot Jupiter'

Started by Mrs.B. Last reply by Mrs.B Apr 9, 2016. 7 Replies

NASA's Solomon's Choice.

Started by Davy Oct 3, 2013. 0 Replies

This is Science at Work.

Started by Davy. Last reply by Davy Aug 15, 2013. 1 Reply

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Comment by Doone on March 20, 2011 at 7:56pm

See Explanation. Clicking on the picture will download the highest resolution version available.

Parthenon Moon 
Image Credit & CopyrightAnthony Ayiomamitis (TWAN)

Explanation: Did you see the Full Moon last night? Near the horizon, the lunar orb may have seemed to loom large, swollen in appearance by the famous Moon illusion. But the Full Moon really was a large Full Moon last night, reaching its exact full phase within an hour of lunar perigee, the point in the Moon's elliptical orbit closest to planet Earth. A similar near perigee Full Moon last occured on December 12, 2008. The difference in the Moon's apparent size as it moves from perigee to apogee, its farthest point from Earth, is about 14 percent. Of course, a nearly Full Moon will rise again tonight, lighting the skies on the date of the Equinox or equal night. The Full Moon also looms large in this well-planned, telescopic lunar portrait. Captured earlier this year, the rising lunar orb is dramatically matched to the 2,500 year old Parthenon, in Athens, Greece.

Comment by Michel on March 19, 2011 at 6:12pm
This is now my new desktop wallpaper.
Comment by Doone on March 19, 2011 at 2:27pm

See Explanation. Clicking on the picture will download the highest resolution version available.

Messier 106 
Image Credit & CopyrightR Jay Gabany

Explanation: Close to the Great Bear (Ursa Major) and surrounded by the stars of the Hunting Dogs (Canes Venatici), this celestial wonder was discovered in 1781 by the metric French astronomer Pierre Mechain. Later, it was added to the catalog of his friend and colleague Charles Messier as M106. Modern deep telescopic views reveal it to be an island universe -- a spiral galaxy around 30 thousand light-years across located only about 21 million light-years beyond the stars of the Milky Way. Along with a bright central core, this colorful composite image highlights youthful blue star clusters and reddish stellar nurseries tracing the galaxy's spiral arms. It also shows off remarkable reddish jets of glowing hydrogen gas. In addition to small companion galaxy NGC 4248 (bottom right) background galaxies can be found scattered throughout the frame. M106 (aka NGC 4258) is a nearby example of the Seyfert classof active galaxies, seen across the spectrum from radio to x-rays. Active galaxies are believed to be powered by matter falling into a massive central black hole.

Comment by Michel on March 19, 2011 at 12:05pm

The Supermoon is this evening




Comment by Michel on March 19, 2011 at 10:59am

Black hole's burps may blow bubbles around Milky Way

 

STARS plunging into the giant black hole at the centre of our galaxy can explain two huge bubbles of gamma rays that NASA's Fermi space telescope discovered last year. The bubbles tower 25,000 light years above and below the Milky Way's disc of stars.

Read more in the discussion above.

 

Comment by Michel on March 17, 2011 at 8:39pm
Stunning animations. And amazing long-distance gymnastics.
Comment by Doone on March 16, 2011 at 9:13am

Hubble has taken this stunning close-up shot of part of the Tarantula Nebula. This star-forming region of ionised hydrogen gas is in the Large Magellanic Cloud, a small galaxy which neighbors the Milky Way. It is home to many extreme conditions including supernova remnants and the heaviest star ever found. The Tarantula Nebula is the most luminous nebula of its type in the local universe. (Credit: NASA, ESA  http://www.sciencedaily.com/releases/2011/03/110315093026.htm
Comment by Adriana on March 15, 2011 at 12:11pm
Comment by Michel on March 14, 2011 at 3:23pm

How the Japan quake moved the Earth on it's axis.


Experts have said the force of the earthquake in Japan shifted the earth's axis by 25 centimetres and shortened the day by 1.8 microseconds - but what does this mean?

Italy's National Institute of Geophysics and Volcanology has calculated that the earth's axis moved by a quarter of a metre as a result of the devastating 8.9 magnitude earthquake in Japan, the largest ever recorded in the country.

The US Geological Survey said the main island of Japan had moved 2.4 metres as a result of the quake. It also said hundreds of aftershocks have hit Japan since the main quake, at least two dozen of which have topped magnitude 6, the size of the Christchurch earthquake.

More on the science of the quake from Channel 4 NewsJapan earthquake: planning for disasterTsunami science: a wall of waterJapan: how dangerous are nuclear blasts? The earthquake, which has had an appalling impact in Japan after causing a huge tsunami, is the fifth most powerful to hit the world in the past century.

It surpassed Japan's biggest previous tremor, the Great Kanto Quake of 1923, which had a magnitude of 7.9 and killed more than 140,000 people in the Tokyo area.

Channel 4 News special report - Japan: tsunami to nuclear crisisIt has also shortened the length of a day on earth by around 1.8 microseconds. To put that into context, one earth day is 24 hours, or 86,400 seconds long.

The length of days varies by around 1 millisecond a year naturally - 1,000 microseconds - and this isn't the first time an earthquake has had an impact on time in this way. Last year's earthquake in Chile, which had an 8.8 magnitude, also sped up the earth's rotation and shaved 1.26 microseconds off the day.

Via Jean-Marie.

Comment by Michel on March 13, 2011 at 8:23am

Extremes: The Biggest Things In the Universe

Biggest planet

Jupiter dominates the other planets in our solar system. Like all planets above a certain size, it is a gas giant made mainly of hydrogen and helium. The gassiest of all known gas giants, the unromantically named TrES-4, was discovered in 2006 orbiting a brightish star 1500 light years from Earth. Its diameter of about 1.8 times Jupiter's makes it the largest accurately measured planet. Strangely, though, TrES-4 is very light for its size. It has only 88 per cent of Jupiter's mass, giving it a density of roughly 0.2 grams per cubic centimetre, less than that of cork. Just how a planet can be as fluffy as TrES-4 remains a mystery.

Update: Science is never still in its pursuit of cosmic extremes: since this story was filed, new observations of the exoplanet WASP-17b suggest that it is even bigger than TrES-4b, with a radius almost twice Jupiter's. The exoplanet is some 1000 light years from Earth and has a mass of just half Jupiter's, making it an even fluffier mystery than TrES-4b.

Biggest artefact

Unless a giant alien monolith has appeared while this article was in press, the biggest known artificial structure in space is the International Space Station, 109 metres across and weighing 370 tonnes.

Biggest galaxy

According to the standard model of galaxy formation, the biggest galaxies are elliptical monsters formed from the collision of many smaller galaxies. The largest known example is the lens-shaped IC 1101, a billion light years away in the centre of the Abell 2029 galaxy cluster. IC 1101 is close to 6 million light years across, making it thousands of times the volume of the Milky Way.

Biggest hole

Not a black hole, for a change, but a vaster expanse of darkness. On the largest scales explored, galaxies are arranged into great walls and knots as much as a few hundred million light years across, with voids in between. The biggest known void - freakishly large at around a billion light years - was found in 2007. One outlandish suggestion is that it is a blemish left by an ancient close encounter with another universe.

Biggest star

A star called VY Canis Majoris, 5000 light years from Earth could swallow our sun 8 billion times over. Probably. Its estimated diameter of nearly 3 billion kilometres puts VY Canis Majoris in with a handful of stars that have earned the title red hypergiant. This estimate is contested, however, and some say the star is a mere red supergiant only 1 billion kilometres across.

 

New Scientist.

 
 
 

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