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Meteors, Asteroids and Comets
Just what can a little spacecraft do to deflect an asteroid - a lot say some scientists.
Viewed: 837 times
01/14/09
Ground-based view of Comet 73P/Schwassmann Wachmann 3 fragments B and G, R, and N on April 8, 2006 made with a 10"/380mm Schmidt Camera. The image is 80 arcminutes wide. Copyright: M. Jäger and G. Rhemann
Viewed: 1029 times
01/14/09
The first image (taken on 18 April 2006) from a three-day observation with Hubble showing the breakup of Comet 73P/Schwassmann-Wachmann 3's Fragment B. Copyright: NASA, ESA, H. Weaver (APL/JHU), M. Mutchler and Z. Levay (STScI)
Viewed: 952 times
01/14/09
Date: 27 Apr 2006
Satellite: Hubble Space Telescope
Depicts: Comet 73P/Schwassmann-Wachmann 3
Copyright: NASA, ESA, H. Weaver (APL/JHU), M. Mutchler and Z. Levay (STScI)

Viewed: 845 times
01/14/09
These tiny particles, from carbonaceous chondrite meteorites, are just a few millionths of a meter wide and have different proportions of nitrogen (N) and hydrogen (H and D) isotopes. These isotopes are chemically bonded to meteoritic organic matter and can reveal a lot about what happened to the meteorite as it made its way through the solar system over billions of years. The two images show the regions with high levels of 15N and heavy hydrogen (deuterium or D)–”indications that the associated carbon is very old and originated from interstellar matter or the outer regions of the solar system. (Image courtesy Henner Busemann; click image for high-resolution version.) Credit: Carnegie Institution
Viewed: 1102 times
01/14/09

Comet particle tracks in aerogel. Credit: Stardust, JPL, NASA
Viewed: 672 times
01/14/09
Comet particle tracks in aerogel. Credit: Stardust, JPL, NASA
Viewed: 694 times
01/14/09
Group photo of Stardust science team at Timber Grove Inn
near San Francisco, California Credit: Stardust, JPL, NASA
Viewed: 742 times
01/14/09
Planetary scientists have found evidence of a meteor impact much larger and earlier than the one that killed the dinosaurs -- an impact that they believe caused the biggest mass extinction in Earth's history.
Credit: Ohio State
Viewed: 732 times
01/14/09
Ralph von Frese, Credit: Ohio State
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01/14/09

A global view of the Asteroid Itokawa, with white box showing region where the Hayabusa spacecraft landed to collect samples. Photo courtesy Japan Aerospace Exploration Agency, Institute of Space and Aeronautical Science.
Viewed: 783 times
01/14/09
The olivines and orthopyroxenes in the Morokweng meteorite (plotted as the star symbol) have higher iron contents than most other LL, L, and H chondrites. Axes are labeled Fs and Fa. Fs (ferrosilite, FeSiO3) is the iron-rich end-member of the enstatite-ferrosilite solid-solution series. Fa (fayalite, Fe2SiO4) is the iron-rich end-member of the olivine solid-solution series.) Credit: Maier, et al. 2006. Nature, v.441, p.205.
Viewed: 1003 times
01/14/09
Imagine the surprise when the drill sliced through an obviously different kind of rock 770 meters down. This is a photograph of the core with the dark-colored fossil meteorite before it was cut for analysis. The melt sheet is also shown for comparison. Pen is shown for scale. Credit: Wolfgang Maier, University of Quebec, Chicoutimi.
Viewed: 1037 times
01/14/09
ESA Envisat MERIS mosaic of Africa
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01/14/09
Photomicrograph taken in polarized transmitted light of chondrules in the Morokweng meteorite showing excentroradial orthopyroxene. Credit: Wolfgang Maier, University of Quebec.
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01/14/09

Photomicrograph taken in polarized transmitted light of chondrules in the Morokweng meteorite showing porphyritic orthopyroxene. Credit: Wolfgang Maier, University of Quebec
Viewed: 1359 times
01/14/09
Monica Grady, professor of planetary and space science at the Open University in the UK.
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01/14/09
Monica Grady, professor of planetary and space science at the Open University in the UK.
Viewed: 657 times
01/14/09
finding a lunar meteorite in Antarctica. Photo credit: ANSMET
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01/14/09
asteroid belt
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01/14/09

Artist's concept of a massive meteorite impact on the planet Earth.
Viewed: 849 times
01/14/09
The solar system, with tiny blue and purple dots to indicate the locations of Kuiper Belt objects.
Image credit: NASA/JPL-Caltech.
Viewed: 662 times
01/14/09
Photo of the dwarf planet Eris, taken by the Hubble Space Telescope.
Viewed: 767 times
01/14/09
"New Object" is Sedna, a dwarf planet with a very elongated orbit.
Viewed: 807 times
01/14/09
The orbit of Pluto does not follow the ecliptic plane of the other planets in the solar system. Image Credit: JHU/APL.
Viewed: 797 times
01/14/09

Artist's conception of eight dwarf planets. No clear photographs have yet been made of these objects.
Viewed: 691 times
01/14/09
Sedna is in the green circle. The picture shows an area of the sky equal to the area covered by a pinhead held at arm's length. Sedna is too faint to be seen by all but the most powerful amateur telescopes. Credit: NASA
Viewed: 1754 times
01/14/09
An artistic rendering of Santa (2003 EL61) and its moons. Credit: NASA/ESA/HST/A. Feild (STScI)
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01/14/09
eris orbit
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01/14/09
300px-2003EL61art
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Illustrations of the Kuiper Belt and Oort Cloud. Oort Cloud cutaway drawing adapted from Donald K. Yeoman's illustration (NASA,JPL)
Viewed: 957 times
01/14/09
True Color Pluto map, adapted from light curves resulting from Charon-Pluto occultation. Credit: E.F. Young, R.P. Binzel, and K. Crane.
Viewed: 711 times
01/14/09
Pluto Cutaway. The large tilt in Pluto's rotational axis (120 degrees) creates very large seasonal variations. As surface ices melt in the migrating sunlight, their gases are transported and redeposited in dark, cold surface regions as frost. At the same time, in other locations on the planet or as Pluto's seasons change, some of the gases of the atmosphere freeze on the surface, causing a slow but continuous exchange of materials between the surface and the atmosphere. This constantly refreshes the surface, perhaps covering much of the planet's topography with freshly deposited ices on time scales of thousands of years.
Credit: NASA/JHU/APL.
Viewed: 1051 times
01/14/09
The asteroid belt estimated to contain over 1 million asteroids with
diameter exceeding one kilometer.
Credit: NASA
Viewed: 813 times
01/14/09
Asteroid 2000 PH5 imaged with ESO's 3.5m New Technology Telescope in
Chile on August 27, 2003, over a time span of 77 minutes. The asteroid
can be seen moving relative to the background stars.
Credit: ESO
Viewed: 1184 times
01/14/09

Radar images obtained at the Arecibo facility in Puerto Rico on July 28,
2004, covering one full rotation of asteroid 2000 PH5 (columns 1 and 4).
Corresponding shape-model fits to the images are shown in columns 2 and
5. Columns 3 and 6 are detailed 3-D renderings of the shape model
itself. Credit: ESO
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01/14/09
From press release: Artist's concept of the OSIRIS spacecraft taking a sample of asteroid RQ36. Credit: NASA/U. of Arizona
Viewed: 886 times
01/14/09
Some scientists believe that comet and asteroid impacts may have delivered material to the early Earth that was important to the origin of life.
Credit: NASA
Viewed: 784 times
01/14/09
This image is an approximation of the shape of the Kuiper-belt object 2003 EL61.
Credit: Caltech
Viewed: 639 times
01/14/09
2003 EL 61 can be seen as a bright object in the center of this image. The small object below 2003 EL 61 is a moon of debris orbiting the larger Kuiper-belt object.
Credit: Caltech
Viewed: 1368 times
01/14/09

This spectacular image of comet Tempel 1 was taken 67 seconds after it obliterated Deep Impact's impactor spacecraft.

Credit: NASA/JPL-Caltech/UMD
Viewed: 700 times
01/14/09
This diagram illustrates how astronomers can capture the elusive spectra of hot-Jupiter planets. To capture a spectrum of the planet, the telescope must observe the system twice. It takes a spectrum of the star together with the planet(first panel), then, as the planet disappears from view, a spectrum of just the star(second panel). By subtracting the star's spectrum from the combined spectrum of the star plus the planet, it is able to get the spectrum for just the planet (third panel).
Credit: NASA/JPL-Caltech
Viewed: 1080 times
01/14/09
Vesta is a huge rock 500 kilometers across that orbits between Mars and Jupiter.
Evidence indicates that Vesta underwent a tremendous splintering collision about a
billion years ago. In October 1960, a small chunk of rock believed to have
originated on Vesta fell to Earth and was recovered in Australia.
Credit: NASA
Viewed: 889 times
01/14/09
This false-color conglomerate image, created using the Hubble Space Telescope, shows
Vesta's rugged surface highlighted by a single crater that dominates the lower part
of the image. Blue indicates low terrain while red indicates raised terrain.
Credit: B. Zellner (GSU), P. Thomas (Cornell), et al., WFPC2, HST, NASA
Viewed: 793 times
01/14/09
This image shows the asteroid Vesta in a starry night sky along side the bright star
epsilon Viriginis. Vesta is barely visible to the naked eye from the darkest and
clearest observing sites on Earth, but this picture was taken on March 24th through
a window on the International Space Station (ISS) by Science Officer Don Pettit.
Because the view from the ISS is not as obstructed by the Earth´ atmosphere, Vesta
was easily captured using a digital camera.
Credit: Don Pettit, NASA
Viewed: 783 times
01/14/09

Montage of Jupiter and the comet fragments of Shoemaker-Levy 9.
Credit: NASA/ESA
Viewed: 689 times
01/14/09
The new study suggests that the parent object of asteroid (298) Baptistina was hit
by another large asteroid, creating numerous large fragments that would later create
the Chicxulub crater on the Yucatan Peninsula as well as the prominent Tycho crater
found on the Moon.
Credit: Southwest Research Institute
Viewed: 1063 times
01/14/09
The image shows the trail of the comet. The nucleus of the comet is the dot marked
by a circle and the trail is the faint straight structure which starts from the
nucleus and goes towards the right side of the image.
Credit: Max Planck Institute for Solar System Research
Viewed: 875 times
01/14/09
When a 20-meter asteroid struck the Tunguska forest in Siberia, trees were
incinerated in a 9-mile radius and knocked over in a 25-mile radius. Luckily, the
asteroid did not strike a heavily populated area.
Credit: Smithsonian Institution
Viewed: 834 times
01/14/09
ESA's Don Quijote mission could launch sometime early in the next decade.
Credit: ESA
Viewed: 601 times
01/14/09

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