All articles tagged with #water worlds
A new study suggests that sub-Neptune planets, previously thought to be potential 'water worlds' or 'Hycean planets,' are likely much drier than expected, with less than 1.5% water by mass, challenging previous assumptions and implications for the search for extraterrestrial life.
A new study suggests that water-rich sub-Neptune exoplanets are less common than previously thought due to chemical processes that destroy water, but Earthlike planets may be more prevalent, increasing the potential for life similar to Earth's in the universe.
Scientists are exploring whether life on Earth began in deep-sea hydrothermal vents or tide pools, with water playing a key role, and are considering the implications for finding extraterrestrial life on water-rich moons of Jupiter and Saturn.
Researchers are exploring the potential of using the James Webb Space Telescope to identify water worlds by detecting specific minerals formed when water interacts with cooling lava on exoplanets. By studying basalt, a common volcanic rock, scientists aim to identify chemical fingerprints that indicate the presence of water. This method could help determine if exoplanets like LHS 3844b once had surface or subsurface water, although it requires extensive telescope time to analyze distant lava flows.
Scientists have conducted lab experiments to simulate hazy atmospheres in water-rich exoplanets, providing insights into how haze affects observations made by telescopes. The research aims to improve the understanding of atmospheric chemistry in exoplanets and aid in the search for extraterrestrial life. The experiments revealed that haze can complicate observations by clouding the view of an exoplanet's atmospheric chemistry and molecular features. By accurately modeling the effects of haze, scientists can better interpret data from telescopes and make more precise conclusions about planetary conditions. The team is now working on creating lab-made haze analogues that closely resemble observations made with telescopes.
A new study suggests that the chances of finding exoplanets with water, a key requirement for Earth-like life, could be 100 times greater than previously estimated. Researchers used computer modeling to analyze planets around red dwarf stars in the Milky Way and concluded that many of these exoplanets could have internal sources of heat capable of creating lakes beneath ice sheets. This expands the probability of finding liquid water on rocky planets to one world for every star. The discovery of subglacial lakes on Earth and the presence of oceans beneath the icy shells of moons like Europa and Enceladus further support the idea that water worlds could be more common than previously thought.
Earth formed within just 3 million years, much faster than previously thought, according to a new study. The authors assert that this rapid genesis occurred through a theory called pebble accretion. The team determined the time scale of Earth’s formation by looking at silicon isotopes from more than 60 meteorites and planetary bodies in the vicinity of Earth, which represent the rubble leftover after planet formation. This study provides “the strongest evidence” that terrestrial planets formed via pebble accretion.