This year’s hunt for meteorites in Antarctica bagged more than 300.
This year’s hunt for meteorites in Antarctica bagged more than 300.
Tag: asteroids
A meteorite that fell to Earth last July in Morocco has proven to be a rare chunk of Mars.
A meteorite that fell to Earth last July in Morocco has proven to be a rare chunk of Mars.
The Quadrantids meteor shower on tonight
The Quadrantids meteor shower is on for tonight.
Want to see an asteroid eclipse a star?
On January 2, 2012, an asteroid is going to transit across the face of Betelgeuse. And if you live in Europe, own a very sensitive telescope, look close and don’t blink, you might be able to see it!
This is all according to a preprint paper published today on the Los Alamos astro-ph preprint website, written by scientist Costantino Sigismondi of the Galileo Ferraris Institute and International Center for Relativistic Astrophysics in Rome. You can download the paper here [pdf].
The transit itself will only last 3.6 seconds, and will only be visible along a narrow swath crossing southern India and moving across the Middle East, through parts of Italy, France, and the southwestern most tips of England and Ireland. A map of this path is below the fold.
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Bringing an asteroid home in a bag.
At last, a close look at Vesta
Dawn has sent back its first images of Vesta from low orbit. I like this one best:
Using the spacecraft’s last drops of fuel, engineers are attempting to aim Deep Impact toward a rendezvous with near Earth asteroid 2002 GT.
Using the spacecraft’s last drops of fuel, engineers are attempting to aim Deep Impact to a 2020 rendezvous with near Earth asteroid 2002 GT.
Dawn has now lowered its orbit to 130 miles above the asteroid Vesta
Dawn has now lowered its orbit to an average elevation of 130 miles above the asteroid Vesta.
Expect lots of close-up images in the weeks to come.
Colorful Vesta
Tonight’s press conference at the American Geophysical Union conference focused on the latest results from Dawn, orbiting the giant asteroid Vesta. Or to put it as scientist Vishnu Reddy put it, “Vesta is the most colorful asteroid in the solar system.”
At least, in geological terms. To our human eye the asteroid wouldn’t be so spectacular. However, the false color images released by the scientists show the global geological diversity of Vesta. From the press release:
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Dawn soars over Vesta in 3D
Dawn soars over Vesta in 3D.
Scientists have released a new 28 frame movie of asteroid 2005 YU55
Scientists have released a new 28 frame movie of asteroid 2005 YU55, created as the asteroid zipped past the Earth this past week.
New data suggests that the asteroid Lutetia is a Rare Survivor from the Birth of the Earth
A new analysis of data suggests that the asteroid Lutetia is a leftover fragment from the same original material that formed the Earth, Venus and Mercury.
NASA’s Deep Space Network has captured a radar image of asteroid 2005 YU55
NASA’s Deep Space Network has captured a radar image of asteroid 2005 YU55, set to buzz past the Earth tomorrow.
Watch asteroid 2005 YU buzz the Earth tomorrow with your backyard telescope
Watch asteroid 2005 YU55 buzz the Earth tomorrow with your backyard telescope.
Astronomers prepare for an asteroid fly-by on November 8, using the Earth as the spacecraft
Astronomers prepare for an asteroid fly-by on November 8, using the Earth as the spacecraft.
Large enough to cause regional devastation if it were to hit the Earth, 2005 YU55 is the closest pass by an asteroid this big since 1976, and there won’t be another until 2028. The near miss provides an unparallelled opportunity for radar, optical and infrared observations of a mysterious charcoal-black world similar to the type of asteroid that astronauts may one day set foot on.
Radar bonanza “It’s a bit like a spacecraft fly-by with the Earth being the spacecraft,” says astronomer Don Yeomans at NASA’s Jet Propulsion Laboratory (JPL) in Pasadena, California. “It’s going to be an extraordinary target for radar.”
“It’s not a rubble pile, it’s a solid block of rock.”
Amateur astronomers discover near Earth asteroid
Amateur astronomers discover near Earth asteroid.
Rough Terrain
The Dawn scientists have released another spectacular image of the south polar mountain on Vesta whose relative size is three times that of Mount Everest. More information about the image can be found here. From the caption:
The peak of Vesta’s south pole mountain, seen in the center of the image, rises about 13 miles (22 kilometers) above the average height of the surrounding terrain. Another impressive structure is a large scarp, a cliff with a steep slope, on the right side of this image. The scarp bounds part of the south polar depression, and the Dawn team’s scientists believe features around its base are probably the result of landslides.
It appears the light gravity on Vesta allows for the formation of extreme topology.
Dawn begins close-up orbit observations
Dawn begins close-up orbit observations of Vesta. More new results here.
In this orbit, the average distance from the spacecraft to the Vesta surface is 420 miles (680 kilometers), which is four times closer than the previous survey orbit.
NASA has identified ninety percent of the largest near-Earth asteroids
Data from the infrared telescope WISE has now identified ninety percent of the largest near-Earth asteroids.
NASA researchers also downgraded their estimate of the number of medium-sized asteroids, saying there are 44 percent fewer than previously believed. The downside is that scientists have yet to find many of these mid-sized asteroids, which could destroy a metropolitan city.