The latter half of the 20th century saw a major expansion of the Search for Extraterrestrial Intelligence (SETI), accompanied by corresponding advances in Messaging Extraterrestrial Intelligence (METI). A key development was the first interstellar SETI and METI experiments: Project Ozma and the Arecibo Message.
Earth may not have needed comets and asteroids to deliver its water after it formed and cooled. Instead, water creation could have been part of the planet's formation process. New research explains how, and even shows that water creation could be a part of every rocky planet's formation.
Living on the Moon, with either trained astronauts or regular civilians, could become a regular occurrence in the near future. However, it’s easier said than done, as scientists and engineers continue developing new and advanced ways for protecting humans in the harsh lunar environment, which contrasts the mild and habitable temperatures of the Earth. The most important aspect is focusing on keeping humans alive, and this includes temperature regulation within the habitats. However, how can you maintain temperature regulation while being flexible enough to withstand physical changes like moving, handling, and compression and expansion?
NASA has committed to launching a new, more powerful UV space telescope. Named UVEX, the UltraViolet EXplorer, it will launch in 2031. It's about 100 times more powerful than its predecessor, GALEX, whose mission ended in 2013. UVEX will perform a survey in UV that will complement infrared surveys by other telescopes.
Betelgeuse has a close-orbiting companion that disturbs the red supergiant into an egg-like shape. New observations show how the two stars interact and how this could help explain the varying brightness of Betelgeuse.
Perhaps the biggest mystery we face is life on Earth started. One hypothesis says that comets, which are known to carry important chemicals in abiogenesis, delivered these compounds to Earth, leading to the appearance of life. But new research concludes that that is highly unlikely.
Finding an Earth-like world beyond the solar system is the Holy Grail of exoplanet research, and the field has experienced incredible technological advancements in searching for and identifying exoplanets since the first exoplanet was discovered in 1995. This includes both ground- and space-based telescopes, specifically the powerful James Webb Space Telescope. However, directly imaging exoplanets remains elusive, primarily due to the enormous technological challenge of imaging a point of light so far away.
