Colourful exoplanets may be first to show evidence of alien life

Colourful alien life may be the easiest to find. Credit: Don Johnston / Getty Images
Colourful alien life may be the easiest to find. Credit: Don Johnston / Getty Images

Exoplanets are now being discovered on a regular basis, including ones that may be potentially habitable. But when even the nearest ones are so far away compared to the planets in our own solar system, how could they be studied for possible signs of life? Is that even possible?

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Astronomers redefine the habitable zone for exoplanets

The new definition of a star's habitable zone will affect how we search for habitable exoplanets. Credit: PHL@UPR Arecibo / Rogelio Bernal Andreo
The new definition of a star’s habitable zone will affect how we search for habitable exoplanets.
Credit: PHL@UPR Arecibo / Rogelio Bernal Andreo

When searching for potentially habitable exoplanets, one of the key factors to take into consideration is the habitable zone, the region around a star where temperatures could allow liquid water to exist on the surface of any rocky planets that may orbit them.

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