Tag Archives: Breakthrough Starshot

Proxima Centauri b – Our Newest Neighbour

This is the biggest exoplanet news ever. 4.25 light years away, a tiny red dwarf star has revealed something extremely important: a potentially Earth-like planet. The ESO announced today that they have discovered a planet orbiting the nearest star to our solar system, Proxima Centauri.

Artist's impression of Proxima Centauri b. Credit: ESO/M. Kornmesser. Source.
Artist’s impression of Proxima Centauri b. Credit: ESO/M. Kornmesser. Source.

So, how big is this planet? At least 1.3 times the size of Earth, or possibly up to 3 Earths. This would mean it’s either an Earth-like planet or a Super Earth. It is most likely to be terrestrial and due to its proximity to its star, it’s tidally locked. One side always faces its star. However, it’s in that very special place in a star’s orbit where liquid water can exist. That’s the good thing. The bad thing is that ultraviolet and X-rays from Proxima Centauri could make the surface of the planet potentially uninhabitable. With that being said, life could thrive below the surface.

What would it be like on the planet, though? The side facing the star would be hot and blasted by radiation. The side facing away from the star would probably be extremely cold, possibly covered in ice. The area that’s perpetually at sunset would be the most habitable and comfortable. If there’s a significant atmosphere, then temperatures could be stabilised all around the planet, and likely to be a constant wind flowing from the day side to the night side.

Breakthrough Starshot, a project started by billionaire Yuri Milner, physicist Stephen Hawking, and others, now has a destination. This project, designed to send tiny probes at 20% the speed of light into interstellar space, could reach Proxima Centauri b in only 20 years, then another 4.25 years to transmit data back to the Earth. The probes would take pictures and send them back. However, the estimated launch date is 2060, so many of us today would unlikely get to see this. Well, I plan to be around in 2084. I’ll only be 107 years old. I want to see this planet!

This has a lot of people excited, including me. I really want to know more about this planet. I wish we could go now. To see the surface of a world orbiting another star would be the dream of any astronomer or astronomy enthusiast. This is big!

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