Scientists identify 45 planets that could support alien life

According to a new study by astronomers, there are 45 planets that could be our best bet for finding alien life.

They were selected from more than 6,000 identified planets. All of them have rocky surfaces and could, in theory, contain water.

Some of them even have weather systems - including cloud cover, humidity, and wind patterns - similar to which we experience on Earth.

The planets in the TRAPPIST system are in a Goldilocks Zone - a zone which may be present in any star system, where the conditions could be suitable for earth-like life.

A bit like the bears' porridge in the famous story, the water on the surface of these planets is not so hot that it boils away and not so cold that it remains permanently frozen - it's just right.

For life to exist as we know it, a planet would also need an atmosphere, a stable climate and the right chemical balance to be a safe habitat.

Among them is a roughly Earth-sized planet circling the nearest star to the Sun, named Proxima Centauri b.

This planet is about 4.2 light years away - almost 25 trillion miles from Earth!

Even if astronauts could travel aboard Voyager 1, a spacecraft with no crew, that is now beyond our Solar System, the journey to Proxima Centauri would take roughly 75,000 years.

So for now, these worlds will have to be explored using the most powerful telescopes we have.

Abigail Bohl of Cornell University, a co-author of the study, explained that her team have used our solar system as a benchmark to analyse the other planets, which are described as exoplanets.

An exoplanet is a planet located outside our solar system, meaning it orbits a star other than our Sun.

"We know Earth is habitable, while Venus and Mars are not," she said.

"We can use our solar system as a reference to search for exoplanets that receive stellar energy between what Venus and Mars get," she said.