| Piú votate - Asteroids and Comets |
Tempel1-ZZ-ZJ-Stardust_1024-PCF-LXTT.jpgComet Tempel-1 from Stardust NeXT Spacecraft (Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)104 visiteCaption NASA:"No Comet has ever been visited twice before. Therefore, the unprecedented pass of the Stardust-NeXT Spacecraft near Comet Tempel-1 in February 2011 gave Humanity a unique opportunity to see how the Nucleus of a Comet changes over time.
Changes in the Nucleus of Comet Tempel-1 were of particular interest because the Comet was hit with an impactor from the passing Deep Impact Spacecraft in 2005. Here is one digitally sharpened image of Comet Tempel-1 near the closest approach of Stardust-NeXT.
Visible are many features already imaged in 2005, including Craters, Ridges and seemingly smoother areas. Few firm conclusions are yet available, but over the next few years astronomers who specialize in Comets and the understanding the early Solar System will be poring over these images looking for new clues as to how Comet Tempel-1 is composed, how the 2005 Impact Site now appears, and how general features of the Comet have evolved".MareKromium
(4 voti)
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Comets-Comet_Hartley_2-NASA-0.jpgComet "Hartley 2" (an Image-Mosaic by NASA, JPL-Caltech, UMD, EPOXI Mission)89 visiteDa "NASA - Picture of the Day" del giorno 5 Novembre 2010:"Follow these 5 frames clockwise starting from the top left to track the view from the EPOXI Mission Spacecraft as it approached, passed under, and then looked back at the nucleus of comet Hartley 2 on November 4.
Its closest approach distance was about 700 Km. In fact, this encounter was the 5th time a spacecraft from planet Earth has imaged a comet close-up. But Hartley 2's Nucleus is definitely the smallest one so far, its long axis spanning only about 2 Km (such as approx. 1,2 miles).
Though Hartley 2 is small, these stunning images showing Jets of Dust and Gas indicate an impressively active surface. The Jets are seen originating from the rough surface areas, with Sunlight illuminating the Nucleus from the right. Remarkably, rough areas at both ends of the elongated Nucleus are joined by a narrower, smooth waist.
The EPOXI mission reuses the Deep Impact Spacecraft that launched a probe impacting the Nucleus of comet Tempel 1 in 2005".MareKromium
(4 voti)
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Comets-Comet_Hartley_2-NASA-1.jpgComet "Hartley 2" (Dimensions)96 visitenessun commentoMareKromium
(4 voti)
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Comets-Comet_Hartley_2-EB-LXTT2.jpgComet "Hartley 2" (credits for the additional process. and color.: Elisabetta Bonora - Lunexit Team)73 visitenessun commentoMareKromium
(4 voti)
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Comets-Comet_Hartley_2-EB-LXTT3.jpgComet "Hartley 2" (credits for the additional process. and color.: Elisabetta Bonora - Lunexit Team)81 visitenessun commentoMareKromium
(4 voti)
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Comets-Comet_Hartley_2-EB-LXTT5.jpgComet "Hartley 2" (credits for the additional process. and color.: Elisabetta Bonora - Lunexit Team)60 visitenessun commentoMareKromium
(4 voti)
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Ida-MF-LXTT.jpgAsteroid "Ida" (possible Natural Colors; credits for the additional process. and color.: Dr Marco Faccin - Lunexit Team)79 visitenessun commentoMareKromium
(4 voti)
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Comets-Wesley-Jupiter_Impact-2.jpgCometary Impact on Jupiter 178 visitenessun commentoMareKromium
(4 voti)
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Comets-Wesley-Jupiter_Impact-1.jpgCometary Impact on Jupiter 108 visitenessun commentoMareKromium
(4 voti)
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KBO-1-Artist_Conception.jpgKuiper's Belt Object occulting a Star59 visiteThis is an artist's impression of a 0,5-mile-diameter Kuiper Belt Object (KBO) that was detected by NASA's Hubble Space Telescope. The icy relic from the early Solar System is too small for Hubble to photograph. The object was detected when it passed in front of a background star, temporarily disrupting the starlight.MareKromium
(4 voti)
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EROS-GIFMovie-050_frame02.gifRolling and Floating: 433-Eros (GIF-Movie; credits: Dr G. Barca)57 visitenessun commentoMareKromium
(4 voti)
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EROS-GIFMovie-049.gifRolling and Floating: 433-Eros (GIF-Movie; credits: Dr G. Barca)57 visitenessun commentoMareKromium
(4 voti)
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