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Glossary term: 인공 위성

Description: 인공위성은 사람이 만든 장치로, 중력에 의해 지구나 다른 태양계 천체 주위를 공전하도록 우주로 보내진 물체입니다. 인공위성은 다양한 목적을 위해 만들어집니다. 예를 들어, 기상 위성은 지구의 구름과 날씨를 촬영해 기상학자들이 날씨를 예측하는 데 도움을 줍니다. 또 천문 위성은 우주에 있는 별, 행성, 먼 은하를 관측해 과학자들이 우주를 더 잘 이해할 수 있게 합니다. 이 외에도 인공위성은 통신, 위성 방송, 인터넷 연결, GPS(위성 위치 확인 시스템) 등 우리 일상생활에서도 중요한 역할을 합니다. GPS 덕분에 우리는 스마트폰이나 자동차 내비게이션으로 현재 위치를 쉽게 확인할 수 있습니다. 세계 최초의 인공위성은 1957년 소련이 발사한 스푸트니크(Sputnik) 1호 입니다.

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Term and definition status: The original definition of this term in English have been approved by a research astronomer and a teacher
The translation of this term and its definition is still awaiting approval

The OAE Multilingual Glossary is a project of the IAU Office of Astronomy for Education (OAE) in collaboration with the IAU Office of Astronomy Outreach (OAO). The terms and definitions were chosen, written and reviewed by a collective effort from the OAE, the OAE Centers and Nodes, the OAE National Astronomy Education Coordinators (NAECs) and other volunteers. You can find a full list of credits here. All glossary terms and their definitions are released under a Creative Commons CC BY-4.0 license and should be credited to "IAU OAE".

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Bright streaks form vertical bars, obscuring the starry sky

Satellite swarm versus night sky beauty, by Torsten Hansen, Germany

Caption: Third place in the 2021 IAU OAE Astrophotography Contest, category Light pollution. This image of Venus and the Pleiades also shows the tracks of the Starlink satellites. These satellites which are located at an altitude of approximately 550 kilometres, are part of an ever-growing constellation of satellites aimed to provide worldwide internet access. The reflective surfaces of the satellites, coupled with the fact that they are orbiting around the Earth, means that astronomical observations which require very long exposures capture “tracks” of the satellites in their images. Astronomical images used for scientific research are not usable because the measurements and data will contain these “tracks”. Because the number of satellites is expected to grow, it is likely that in the near future there will be no place on Earth where these satellites will not be visible crossing the sky. This is a new type of light pollution that seems to be an upcoming problem we will have to deal with, as these satellites might prevent optimal observation of the sky.
Credit: Torsten Hansen/IAU OAE

License: CC-BY-4.0 Creative Commons 저작자표시 4.0 국제 (CC BY 4.0) icons

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