File:2014 UN271 Jan 2022 Hubble crop.png
此為最大尺寸。
2014_UN271_Jan_2022_Hubble_crop.png （350 × 290 像素，檔案大小：137 KB，MIME 類型：image/png）
摘要
| 描述 |
English: This sequence shows how the nucleus of Comet C/2014 UN271 (Bernardinelli-Bernstein) was isolated from a vast shell of dust and gas surrounding the solid icy nucleus. On the left is a photo of the comet taken by the NASA Hubble Space Telescope's Wide Field Camera 3 on January 8, 2022. A model of the coma (middle panel) was obtained by means of fitting the surface brightness profile assembled from the observed image on the left. This allowed for the coma to be subtracted, unveiling the point-like glow from the nucleus. Combined with radio telescope data, astronomers arrived at a precise measurement of the nucleus size. That's no small feat from something about 2 billion miles away. Though the nucleus is estimated to be as large as 85 miles across, it is so far away it cannot be resolved by Hubble. Its size is derived from its reflectivity as measured by Hubble. The nucleus is estimated to be as black as charcoal. The nucleus area is gleaned from radio observations. |
| 日期 | |
| 來源 | https://www.nasa.gov/feature/goddard/2022/hubble-confirms-largest-comet-nucleus-ever-seen |
| 作者 |
NASA, ESA, Man-To Hui (Macau University of Science and Technology), David Jewitt (UCLA); Image processing: Alyssa Pagan (STScI) |
授權條款
|
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/zh，NASA版權政策或JPL圖像使用政策） |  |
 |
警告:
|
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 | 2022年4月13日 (三) 00:02 | | 350 × 290（137 KB） | Nrco0e | Uploaded a work by NASA, ESA, Man-To Hui (Macau University of Science and Technology), David Jewitt (UCLA);<br>Image processing: Alyssa Pagan (STScI) from https://www.nasa.gov/feature/goddard/2022/hubble-confirms-largest-comet-nucleus-ever-seen with UploadWizard |
檔案用途
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：
- en.wikipedia.org 的使用狀況
- fr.wikipedia.org 的使用狀況
- ja.wikipedia.org 的使用狀況
