File:Artist's conception of Kepler-42.jpg

原始檔案 (4,268 × 2,400 像素,檔案大小:1.49 MB,MIME 類型:image/jpeg


摘要

描述
English: Mini Planetary System

This artist's concept depicts an itsy bitsy planetary system -- so compact, in fact, that it's more like Jupiter and its moons than a star and its planets. Astronomers using data from NASA's Kepler mission and ground-based telescopes recently confirmed that the system, called Kepler-42 (formerly KOI-961), hosts the three smallest exoplanets known so far to orbit a star other than our sun. An exoplanet is a planet that resides outside of our solar system.

The star, which is located about 130 light-years away in the Cygnus constellation, is what's called a red dwarf. It's one-sixth the size of the sun, or just 70 percent bigger than Jupiter. The star is also cooler than our sun, and gives off more red light than yellow.

The smallest of the three planets, called Kepler-42d (Formerly KOI-961.03), is actually located the farthest from the star, and is pictured in the foreground. This planet is about the same size as Mars, with a radius only 0.57 times that of Earth. The next planet to the upper right is Kepler-42b (formerly KOI-961.01), which is 0.78 times the radius of Earth. The planet closest to the star is Kepler-42c (formerly KOI-961.02), with a radius 0.73 times the Earth's.

All three planets whip around the star in less than two days, with the closest planet taking less than half a day. Their close proximity to the star also means they are scorching hot, with temperatures ranging from 350 to 836 degrees Fahrenheit (176 to 447 degrees Celsius). The star's habitable zone, or the region where liquid water could exist, is located far beyond the planets.

The ground-based observations contributing to these discoveries were made with the Palomar Observatory, near San Diego, Calif., and the W.M. Keck Observatory atop Mauna Kea in Hawaii.
日期
來源 http://www.nasa.gov/mission_pages/kepler/multimedia/images/mini-planetary-system.html
作者 NASA/JPL-Caltech

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)

多媒體型式 繁體中文 (已轉換拼寫)

image/jpeg

校驗和 繁體中文 (已轉換拼寫)

09dc07250cf7107ff20be8c1d16eddf9ae26ca4c

斷定方法:​SHA-1 中文 (已轉換拼寫)

1,559,261 位元組

2,400 像素

4,268 像素

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2017年4月15日 (六) 19:47於 2017年4月15日 (六) 19:47 版本的縮圖4,268 × 2,400(1.49 MB)Karl432Color corrected. Instead of a strange pink, the star now shines in a RGB value appropriate for a 3100K black body.
2012年1月19日 (四) 13:26於 2012年1月19日 (四) 13:26 版本的縮圖4,268 × 2,400(3.21 MB)החבלןFull-size image from source
2012年1月12日 (四) 00:46於 2012年1月12日 (四) 00:46 版本的縮圖946 × 710(70 KB)החבלן

下列頁面有用到此檔案:

全域檔案使用狀況

以下其他 wiki 使用了這個檔案:

詮釋資料