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Planets and exoplanets of unexplored galaxies. Sci-Fi. New worlds to discover. Colonization and exploration of nebulae and galaxies

The Search for Extraterrestrial Life 15

Recent news features Earth-like planets and water worlds — and how comet impacts may be providing Europa’s oceans with material

In our universe: Here are the James Webb Space Telescope’s best images from a spectacular year first year (it launched December 25, 2021). Could there be such a thing as “dark light?” Science writer Tibi Puiu tells us at ZME Science that some physicists think that the mysterious dark matter of the universe is made out of dark photons: “A new study found that hypothetical particles called dark photons can explain discrepencies in the ‘cosmic web’.” (December 14, 2022) “First introduced in 1986 by physicist Bob Holdom, dark photons, also known as ‘heavy photons’ or ‘hidden photons’, are supposed to be gauge bosons for dark matter. Dark photons and regular photons are expected to mix, such that the dark photons Read More ›

weird ice planet

We Won’t Find ET on Ocean Planets, Researchers Say

We will see few extraterrestrials if a great many promising exoplanets are Waterworlds

Science writer Matt Williams has been writing a series on the question of why, despite the size of our galaxy, we see no other intelligent life forms. It could be, he suggests, that “many planets out there are just too watery!” Williams points out that, although water covers 71% of Earth’s surface, it is only 0.02% of the planet’s mass. If the proportion were much higher, Earth would be an ocean planet because the water would surface. It’s an open question whether an ocean planet would feature highly technologically developed intelligent life forms. Dolphins, for example, are quite intelligent but they do not seek to use any technology. The question of whether a planet could have too much water arose, Read More ›