File:Potw1749a_Pallas_crop.png
維基百科,自由的 encyclopedia
Potw1749a_Pallas_crop.png (314 × 316像素,文件大小:37 KB,MIME类型:image/png)
摘要
描述Potw1749a Pallas crop.png |
English: VLT's SPHERE spies rocky worlds
From the description at File:Potw1749a.tif: These images were taken by ESO's SPHERE (Spectro-Polarimetric High-Contrast Exoplanet Research) instrument, installed on the Very Large Telescope at the Paranal Observatory, Chile. These strikingly-detailed views reveal four of the millions of rocky bodies in the main asteroid belt, a ring of asteroids between Mars and Jupiter that separates the rocky inner planets of the Solar System from the gaseous and icy outer planets. Clockwise from top left, the asteroids shown here are 29 Amphitrite, 324 Bamberga, 2 Pallas, and 89 Julia. Named after the Greek goddess Pallas Athena, 2 Pallas is about 510 kilometres wide. This makes it the third largest asteroid in the main belt and one of the biggest asteroids in the entire Solar System. It contains about 7% of the mass of the entire asteroid belt — so hefty that it was once classified as a planet. A third of the size of 2 Pallas, 89 Julia is thought to be named after St Julia of Corsica. Its stony composition led to its classification as an S-type asteroid. Another S-type asteroid is 29 Amphitrite, which was only discovered in 1854. 324 Bamberga, one of the largest C-type asteroid in the asteroid belt, was discovered even later: Johann Palisa found it in 1892. Today, it is understood that C-type asteroids may actually be bodies from the outer Solar System following the migration of the giant planets. As such, they may contain ice in their interior. Although the asteroid belt is often portrayed in science fiction as a place of violent collisions, packed full of large rocks too dangerous for even the most skilled of space pilots to navigate, it is actually very sparse. In total, the asteroid belt contains just 4% of the mass of the Moon, with about half of this mass contained in the four largest residents: Ceres, 4 Vesta, 2 Pallas, and 10 Hygiea. |
日期 | 4 December 2017, 06:00 (release) |
来源 | cropped from File:Potw1749a.tif, which was obtained from http://www.eso.org/public/images/potw1749a/ |
作者 | Credit: ESO/Vernazza et al. |
许可协议
This media was created by the European Southern Observatory (ESO).
Their website states: "Unless specifically noted, the images, videos, and music distributed on the public ESO website, along with the texts of press releases, announcements, pictures of the week, blog posts and captions, are licensed under a Creative Commons Attribution 4.0 International License, and may on a non-exclusive basis be reproduced without fee provided the credit is clear and visible." To the uploader: You must provide a link (URL) to the original file and the authorship information if available. | |
文件历史
点击某个日期/时间查看对应时刻的文件。
日期/时间 | 缩略图 | 大小 | 用户 | 备注 | |
---|---|---|---|---|---|
当前 | 2019年3月22日 (五) 00:03 | 314 × 316(37 KB) | Kwamikagami | User created page with UploadWizard |
文件用途
以下页面使用本文件:
全域文件用途
以下其他wiki使用此文件:
- af.wikipedia.org上的用途
- als.wikipedia.org上的用途
- an.wikipedia.org上的用途
- ar.wikipedia.org上的用途
- arz.wikipedia.org上的用途
- ast.wikipedia.org上的用途
- az.wikipedia.org上的用途
- ba.wikipedia.org上的用途
- be-tarask.wikipedia.org上的用途
- be.wikipedia.org上的用途
- bg.wikipedia.org上的用途
- br.wikipedia.org上的用途
- ca.wikipedia.org上的用途
- ce.wikipedia.org上的用途
- ckb.wikipedia.org上的用途
- cs.wikipedia.org上的用途
- cu.wikipedia.org上的用途
- cy.wikipedia.org上的用途
- da.wikipedia.org上的用途
- de.wikipedia.org上的用途
- en.wikipedia.org上的用途
- 2 Pallas
- List of exceptional asteroids
- B-type asteroid
- List of Solar System objects by size
- User:Kwamikagami/sandbox
- Discovery and exploration of the Solar System
- User:Fotaun
- User:Kazkaskazkasako/Books/Physical sciences
- User:PlanetUser
- List of former planets
- User:Double sharp/Largest Solar System objects
- eo.wikipedia.org上的用途
- es.wikipedia.org上的用途
- et.wikipedia.org上的用途
- eu.wikipedia.org上的用途
- fa.wikipedia.org上的用途
- fi.wikipedia.org上的用途
- fr.wikipedia.org上的用途
- fr.wiktionary.org上的用途
- ga.wikipedia.org上的用途
- glk.wikipedia.org上的用途
查看此文件的更多全域用途。
元数据
此文件中包含有扩展的信息。这些信息可能是由数码相机或扫描仪在创建或数字化过程中所添加。
如果此文件的源文件已经被修改,一些信息在修改后的文件中将不能完全反映出来。
水平分辨率 | 28.35 dpc |
---|---|
垂直分辨率 | 28.35 dpc |