파일:Planets in the Making.jpg
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| 설명Planets in the Making.jpg |
English: Our Solar System formed out of a huge, primordial cloud of gas and dust. The vast majority of that cloud formed the Sun, while the leftover disc of rotating material around it eventually coalesced into the orbiting planets we know — and live on — today.
Astronomers can observe similar processes happening around other stars in the cosmos. This splendid Picture of the Week shows a disc of rotating, leftover material surrounding the young star HD 163296. Using the observing power of the Atacama Large Millimeter/submillimeter Array (ALMA) in Chile, astronomers have been able to discern specific features in the disc, including concentric rings of material surrounding the central star. They were even able to use ALMA to obtain high-resolution measurements of the gas and dust constituents of the disc. With these data they could infer key details of the formation history of this young stellar system. The three gaps between the rings are likely due to a depletion of dust and in the middle and outer gaps astronomers also found a lower level of gas. The depletion of both dust and gas suggests the presence of newly formed planets, each around the mass of Saturn, carving out these gaps on their brand new orbits. |
| 날짜 | |
| 출처 | https://www.eso.org/public/images/potw1652a/; see original posting at https://www.almaobservatory.org/en/images/star-hd-163296/ and https://public.nrao.edu/news/2016-alma-planets-disk/#PRimageSelected |
| 저자 | ALMA (ESO/NAOJ/NRAO); A. Isella; B. Saxton (NRAO/AUI/NSF) |
라이선스
This image was produced by the ALMA Observatory.
Unless specifically noted, the images and videos distributed from the public ALMA websites (www.almaobservatory.org, www.alma.cl, and kids.alma.cl) along with the texts of press releases, announcements, pictures of the week 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. Details on how to interpret this are given below for those who need further explanation. See the ALMA copyright notice for complete information. Conditions:
Notes:
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이 파일은 크리에이티브 커먼즈 저작자표시 4.0 국제 라이선스로 배포됩니다. 저작자표시: ALMA (ESO/NAOJ/NRAO); A. Isella; B. Saxton (NRAO/AUI/NSF)
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14 12 2016
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| 날짜/시간 | 섬네일 | 크기 | 사용자 | 설명 | |
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| 현재 | 2019년 8월 10일 (토) 08:19 | 2,000 × 2,000 (240 KB) | wikimediacommons>BevinKacon | actual size from ESO original source |
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