Near-Earth objects
NASA's Near-Earth Object (NEO) web-site. Data related to Earth impact risk, close-approaches, and much more. ,Near-Earth objects (NEOs) are asteroids or comets of sizes ranging from metres to tens of kilometres that orbit the Sun and whose orbits come close to that ...
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 Near-Earth objects 相關參考資料
Asteroid Watch - NASA
A Near-Earth Object (NEO) is generally defined as an asteroid or comet that approaches our planet less than 1.3 times the distance from Earth to the Sun (the ... https://www.jpl.nasa.gov Center for NEO Studies
NASA's Near-Earth Object (NEO) web-site. Data related to Earth impact risk, close-approaches, and much more. https://cneos.jpl.nasa.gov ESA - Near-Earth Objects - NEO Segment - European Space ...
Near-Earth objects (NEOs) are asteroids or comets of sizes ranging from metres to tens of kilometres that orbit the Sun and whose orbits come close to that ... https://www.esa.int Near Earth Objects Upcoming Close Approaches - TheSkyLive
A constantly up to date list of the predicted close approaches of Earth with of NEO Asteroids happening now and in the future. https://theskylive.com Near-Earth object - Wikipedia
A near-Earth object (NEO) is any small Solar System body whose orbit brings it into proximity with Earth. By convention, a Solar System body is a NEO if its ... https://en.wikipedia.org Near-Earth Object Observations Program | NASA
2021年11月4日 — The key element of NASA's Planetary Defense effort is the Near-Earth Object (NEO) Observations Program, which is composed of projects to ... https://www.nasa.gov Near-Earth Objects - UNOOSA
https://www.unoosa.org NEO Basics - cneos - NASA
Near-Earth Objects (NEOs) are comets and asteroids that have been nudged by the gravitational attraction of nearby planets into orbits that allow them to ... https://cneos.jpl.nasa.gov NEO Earth Close Approaches
NASA's Near-Earth Object (NEO) web-site. ... The following table shows close approaches to the Earth by near-Earth objects (NEOs) limited as selected in the ... https://cneos.jpl.nasa.gov NEO Groups - cneos - NASA
In terms of orbital elements, NEOs are asteroids and comets with perihelion distance q less than 1.3 au . Near-Earth Comets (NECs) are further restricted to ... https://cneos.jpl.nasa.gov |