Detecting Earth from distant star-based systems: Difference between revisions

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Revision as of 18:17, 23 October 2023

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{{use dmy dates |date=October 2020}}

{{short description|Detecting Earth as an exoplanet}}

[[File:Pale Blue Dot.png|thumb|upright=1.3|alt=Dark grey and black static with coloured vertical rays of sunlight over part of the image. A small pale blue point of light is barely visible.|[[Pale Blue Dot]], a photograph of [[Earth]] taken on February 14, 1990, by the ''[[Voyager 1]]'' [[space probe]] from a distance of approximately {{Nowrap|6 billion}} kilometers ({{nowrap|3.7 billion}} miles, 40.5 [[Astronomical unit|AU]])Seen from about 6 billion kilometers (3.7 billion miles). [[Earth]] is seen as a tiny dot within deep space: the blueish-white speck almost halfway up the rightmost band of light.]]

There are several methods currently used by astronomers to detect distant [[exoplanet]]s from [[Earth]].<ref name="NASA-2020">{{cite web |author=Staff |title=5 Ways to Find a Planet |url=https://exoplanets.nasa.gov/alien-worlds/ways-to-find-a-planet/ |date=2020 |work=[[NASA]] |accessdate=24 October 2020 }}</ref> Theoretically, some of these same methods may be used to detect the Earth as an exoplanet from distant star systems.