Are we alone in the universe?
It's no secret that Glenn keeps one eye on the cosmos, searching for any signs of ET. Late last week, a team of astronomers at the University of Cambridge made an exciting discovery that could change how we view the universe. The astronomers were monitoring a distant planet, K2-18b, when the James Webb Space Telescope detected dimethyl sulfide and dimethyl disulfide, two atmospheric gases believed only to be generated by living organisms. The planet, which is just over two and a half times larger than Earth, orbits within the "habitable zone" of its star, meaning the presence of liquid water on its surface is possible, further supporting the possibility that life exists on this distant world.
Unfortunately, humans won't be able to visit K2-18b to see for ourselves anytime soon, as the planet is about 124 light-years from Earth. This means that even if we had rockets that could travel at the speed of light, it would still take 124 years to reach the potentially verdant planet. Even if humans made the long trek to K2-18b, they would be faced with an even more intense challenge upon arrival: Gravity. Assuming K2-18b has a similar density to Earth, its increased size would also mean it would have increased gravity, two and a half times as much gravity, to be exact. This would make it very difficult, if not impossible, for humans to live or explore the surface without serious technological support. But who knows, give Elon Musk and SpaceX a few years, and we might be ready to seek out new life (and maybe even new civilizations).
But Glenn wants to know what you think. Could K2-18b harbor life on its distant surface? Could alien astronomers be peering back at us from across the cosmos? Would you be willing to boldly go where no man has gone before? Let us know in the poll below: