Mapping the pull of gravity on Earth

This globe—the BBC has a spinnable version—shows you how the strength of gravitational pull differs in different places around the Earth. The yellow areas were where gravity is strongest. The blue spots is where it is weakest.


The picture you see here isn't meant to be a totally accurate representations, it's just meant to get across the simple idea of differences in gravity, separate from

Bank of America reviews documents amid

A team of up to 20 Bank of America Corp officials, led by the chief risk officer, Bruce Thompson, have been reviewing thousands of documents amid a threat that it may be a target of WikiLeaks, The New York Times reported on Sunday.

The director of WikiLeaks, Julian Assange, previously said he had intended to "take down" a major U.S. bank and reveal an "ecosystem of corruption" from data from an

WikiLeaks Whales : Activists clash with hunting boat as US, Japan

Of Whales and WikiLeaks: Activists clash with hunting boat as US, Japan talks revealed

Astronomy Picture of the Day Archive 2011

Astronomy Picture of the Day Archive
Astronomy Picture of the Day 2011 Archives


Click Here for Astronomy Picture of the Day Archive 2009
Click Here for Astronomy Picture of the Day Archive 2010



2011 May 10: Gravity Probe B Confirms the Existence of Gravitomagnetism
2011 May 09: Wonder and Mystery above the Very Large Telescopes
2011 May 08: Shadow of a Martian Robot

One Million Galaxies

Are the nearest galaxies distributed randomly? A plot of over one million of the brightest "extended sources" detected by the Two Micron All Sky Survey (2MASS) shows that they are not. The vast majority of these infrared extended sources are galaxies. Visible above is an incredible tapestry of structure that provides limits on how the universe formed and evolved. Many galaxies are

Sideways Orion Over Snowy Ireland

Orion always comes up sideways ... and was caught in the act earlier this month by over a snowy landscape in Donegal, Ireland. To compose this serene picture, the photographer found a picturesque setting to the east, waited until after sunset, and then momentarily lit the foreground with a flashlight. The three bright stars in Orion's belt stand in a nearly vertical line above the snow

Decorating the Sky

Bright stars, clouds of dust and glowing nebulae decorate this cosmic scene, a skyscape just north of Orion's belt. Close to the plane of our Milky Way Galaxy, the wide field view spans about 5.5 degrees. Striking bluish M78, a reflection nebula, is at the left. M78's tint is due to dust preferentially reflecting the blue light of hot, young stars. In colourful contrast, the red sash of

Apollo 8: Christmas at the Moon

Christmas Eve, 1968. As one of the most turbulent, tragic years in American history drew to a close, millions around the world were watching and listening as the Apollo 8 astronauts -- Frank Borman, Jim Lovell and Bill Anders -- became the first humans to orbit another world.

As their command module floated above the lunar surface, the astronauts beamed back images of the moon and Earth and took

Star Trails in the North

Pointing skyward, the wall of this ruined Viking church still stands after a thousand winters, near the town of Vallentuna, Sweden. The time exposure records the scene on December 14th as stars leave graceful arcing trails during a long night, reflecting planet Earth's daily rotation on its axis. The Earth's axis points toward Polaris, the North Star, near the centre of the concentric trails.

NASA Hosts Planet-Finding Tweetup in California's Silicon Valle

NASA will give 100 of its Twitter followers an insider look at its planet-hunting Kepler spacecraft and the agency's Ames Research Center on Feb. 11 in Moffett Field in California.

For the first time, NASA's Twitter followers are being invited to Ames to learn about planetary discoveries from Kepler and the science flights of NASA's Stratospheric Observatory for Infrared Astronomy (SOFIA)

GOES Satellites Capture Holiday Weather Travel Conditions

  Data from the GOES-13 and GOES-11 satellites were used to create a full image of the continental U.S. on Dec. 23 at 1145 UTC (6:45 a.m. EST) as travelers make their way across the country to their holiday destinations. The area clouds from the U.S. southwest stretching north are associated with a low pressure area over Colorado. The clouds over eastern New England are associated with a low

The Solstice Moon's Eclipse

A big, bright, beautiful Full Moon slid into planet Earth's shadow early Tuesday morning. Remarkably, the total lunar eclipse coincided with the date of the December Solstice. During the eclipse, the best viewing in North America found the coppery lunar disc high in a cold winter sky, the Moon reddened by light filtering into the Earth's dark central shadow or umbra. The light comes from all

Spinoff 2010

 

 
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Hidden Galaxy IC 342

 

Similar in size to other large, bright spiral galaxies, IC 342 is a mere 7 million light-years distant in the long-necked, northern constellation Camelopardalis. A sprawling island universe, IC 342 would otherwise be a prominent galaxy in our night sky, but it is almost hidden from view behind the veil of stars, gas and dust clouds in the plane of our Milky Way galaxy. Even though IC 342's

Tyrrhenian Sea and Solstice Sky

Today the solstice occurs at 23:38 Universal Time, the Sun reaching its southernmost declination in planet Earth's sky. Of course, the December solstice marks the beginning of winter in the northern hemisphere and summer in the south. When viewed from northern latitudes, and as shown in the above horizontally compressed image, the Sun will make its lowest arc through the sky along the

A Lunar Eclipse on Solstice Day

Sometime after sunset tonight, the Moon will go dark. This total lunar eclipse, where the entire Moon is engulfed in the shadow of the Earth, will be visible from all of North America, while the partial phase of this eclipse will be visible throughout much of the rest of the world. Observers on North America's east coast will have to wait until after midnight for totality to begin,

M82: Galaxy with a Supergalactic Wind

What's lighting up the Cigar Galaxy? M82, as this irregular galaxy is also known, was stirred up by a recent pass near large spiral galaxy M81. This doesn't fully explain the source of the red-glowing outwardly expanding gas, however. Recent evidence indicates that this gas is being driven out by the combined emerging particle winds of many stars, together creating a galactic

North America and the Pelican

 
Here lie familiar shapes in unfamiliar locations. On the left is an emission nebula cataloged as NGC 7000, famous partly because it resembles our fair planet's continent of North America. The emission region to the right of the North America Nebula is IC 5070, also known for its suggestive outlines as the Pelican Nebula. Separated by a dark cloud of obscuring dust, the two bright

Get Ready for the Solstice Lunar Eclipse!

The first total lunar eclipse in two years will grace the sky the night of Monday, Dec. 20, and we want you to be there. Sure, it's a school night, but with winter solstice and a new year upon us, what better time to gather your family and friends to see the moon in a new light?

At NASA, we're pretty excited for this year's lunar eclipse, so we're offering a number of features and

A Meteor Moment

Intensely bright, this fireball meteor flashed through Tuesday's cold, clear, early morning skies over the Karkas Mountains in central Iran, near the peak of the annual Geminid Meteor Shower. To capture the meteor moment and wintery night skyscape, the photographer's camera was fixed to a tripod, its shutter open for about 1.5 minutes. During that time, the multitude of stars slowly traced