跳至內容

File:Uranus - Voyager 2.jpg

頁面內容不支援其他語言。
這個檔案來自維基共享資源
維基百科,自由的百科全書

Uranus_-_Voyager_2.jpg (400 × 390 像素,檔案大小:20 KB,MIME 類型:image/jpeg


摘要

描述

Once considered one of the blander-looking planets, Uranus (pronounced YOOR un nus) has been revealed as a dynamic world with some of the brightest clouds in the outer solar system and 11 rings. The first planet found with the aid of a telescope, Uranus was discovered in 1781 by astronomer William Herschel. The seventh planet from the Sun is so distant that it takes 84 years to complete one orbit. Uranus, with no solid surface, is one of the gas giant planets (the others are Jupiter, Saturn, and Neptune).

The atmosphere of Uranus is composed primarily of hydrogen and helium, with a small amount of methane and traces of water and ammonia. Uranus gets its blue-green color from methane gas. Sunlight is reflected from Uranus' cloud tops, which lie beneath a layer of methane gas. As the reflected sunlight passes back through this layer, the methane gas absorbs the red portion of the light, allowing the blue portion to pass through, resulting in the blue-green color that we see. The planet's atmospheric details are very difficult to see in visible light. The bulk (80 per-cent or more) of the mass of Uranus is contained in an extended liquid core consisting primarily of 'icy' materials (water, methane, and ammonia), with higher-density material at depth.
來源 http://sse.jpl.nasa.gov/planets/profile.cfm?Object=Uranus
作者 NASA

授權條款

Public domain 本作品由NASA創作,屬於公有領域。根據NASA的版權政策:“NASA的創作除非另有聲明否則不受版權保護。”(參見:Template:PD-USGov/zhNASA版權政策JPL圖像使用政策
警告:

說明

添加單行說明來描述出檔案所代表的內容

在此檔案描寫的項目

描繪內容

著作權狀態 繁體中文 (已轉換拼寫)

斷定方法:​美國聯邦政府的作品 繁體中文 (已轉換拼寫)

檔案歷史

點選日期/時間以檢視該時間的檔案版本。

日期/時間縮⁠圖尺寸用戶備⁠註
目前2015年4月25日 (六) 10:09於 2015年4月25日 (六) 10:09 版本的縮圖400 × 390(20 KB)Jcpag2012larger -- cropped and resized with 400x390px
2015年4月18日 (六) 05:00於 2015年4月18日 (六) 05:00 版本的縮圖248 × 225(6 KB)SteinsplitterBotBot: Image rotated by 90°
2008年12月13日 (六) 23:56於 2008年12月13日 (六) 23:56 版本的縮圖225 × 250(5 KB)Zanhsieh{{Information |Description=Once considered one of the blander-looking planets, Uranus (pronounced YOOR un nus) has been revealed as a dynamic world with some of the brightest clouds in the outer solar system and 11 rings. The first planet found with the a

全域檔案使用狀況

以下其他 wiki 使用了這個檔案:

詮釋資料