How cold is space? | Science


The temperature of space depends on how close we are to objects that radiate heat, such as stars. In the Earth’s orbit, the temperature can rise to as much as 120 degrees in the sunshine, but on the shadow side it is colored in a hundred degrees of frost.

In the orbit of Mercury, the planet closest to the sun, the temperature rises to a maximum of over 400 degrees and falls to a minimum of 200 degrees below zero. The big differences are due to Mercury’s thin atmosphere.

The farther away from radiating objects, the colder it becomes. The temperature of almost empty space is -270.5 degrees, that is, only three degrees more than the coldest possible temperature. At this absolute zero point, all motion of the atoms ceases.

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Defendant: Talvikki Hovatta

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Academy Research Fellow and Docent of Astronomy, University of Turku.

Published in Science Journal 13/2021.


Source: Tiede by www.tiede.fi.

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