Astronomers have finally figured out why a planet discovered in 2020 is able to reflect much of its star's light like a mirror.
For a bit of context, Earth’s albedo is roughly 30 percent because it reflects roughly 30 percent of the Sun’s light into space. Venus, on the other hand, reflects around 75 percent of the Sun’s light, thanks to its thick clouds. So, when astronomers found this star was reflecting around 80 percent of its star’s light, they were baffled.
By all accounts, astronomers believed the planet should be too hot to even have clouds. That’s because it was estimated to have a surface temperature of roughly 2,000 degrees Celsius. The planet is also slightly larger than the size of Neptune. Finding a Neptune-sized world this close to its star was already intriguing enough, but when they discovered how much light it was reflecting, the real mystery came into play.
The planet is roughly the same size as Neptune, which is shown above. However it is what astronomers call a “Hot Neptune.” Image source: revers_jr / Adobe So how would a planet that is literally too hot to have clouds reflect light? What if it was literally a mirror planet? Well, that explanation might not be that out-of-this-world. According to a
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