O que é um ano-luz? infographic
A infografia explica a distância que a luz percorre em certos períodos de tempo.
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ESPAÇO

A que distância está o K2-18b – o planeta que pode ter vida?

By Ninian Carter

April 17, 2025 - A nova descoberta de compostos químicos na atmosfera de um planeta
a orbitar uma estrela anã vermelha, que podem indicar uma abundância de vida aquática, encontra-se a cerca de 124 anos-luz da Terra.

The new discovery of chemicals in the atmosphere of a planet orbiting a red dwarf star, that may indicate an abundance of aquatic life, is some 124 light years from Earth.

A light-year is the distance light travels in one year. Light zips through interstellar space at 300,000 kilometres per second – 9.46 trillion kilometres a year.

Scientists have discovered two chemicals in the atmosphere of K2-18b orbits, a large planet orbiting a red dwarf star in the Leo constellation, that on Earth are only known to be produced by life – dimethyl sulphide and dimethyl disulphide.

Sources
PUBLISHED: 17/04/2025; STORY: Graphic News
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