A new study finds that rocky planets orbiting small stars do have the potential for stable, life-supporting atmospheres. The finding supports continued study of the TRAPPIST-1 system and other top candidates in the search for life outside our solar system.
A team at the 91探花 and the University of Bern has computationally simulated more than 200,000 hypothetical Earth-like worlds all in orbit of stars like our sun. As they report in a paper accepted to the Planetary Science Journal and submitted Dec. 6 to the preprint site arXiv, on these simulated exoplanets, one common feature of present-day Earth was often lacking: partial ice coverage. About 90% of these potentially habitable hypothetical worlds lacked partial surface ice like polar caps.
Sleep cycles in people oscillate during the 29.5-day lunar cycle: In the days leading up to a full moon, people go to sleep later in the evening and sleep for shorter periods of time. The team, led by researchers at the 91探花, observed these variations in both the time of sleep onset and the duration of sleep in urban and rural settings 鈥� from Indigenous communities in northern Argentina to college students in Seattle, a city of more than 750,000. They saw the oscillations regardless of an individual鈥檚 access to electricity, though the variations are less pronounced in individuals living in urban environments.
A 91探花-led team has revisited and comprehensively reinterpreted the radio telescope observations underlying a widely reported 2019 claim that phosphine gas was present in the atmosphere of Venus. In a paper accepted to the Astrophysical Journal, they report that sulfur dioxide, a common gas in the atmosphere of Venus, is likely what was detected instead of phosphine.
A study accepted by the Planetary Science Journal shows that the planets of the TRAPPIST-1 system share similar densities. That could mean they all contain roughly the same ratio of materials thought to be common to rocky planets, such as iron, oxygen, magnesium and silicon — though they appear to differ notably from Earth.
The subsurface ocean of Saturn’s moon Enceladus probably has higher than previously known concentrations of carbon dioxide and hydrogen and a more Earthlike pH level, possibly providing conditions favorable to life, according to new research from planetary scientists at the UW.
On July 6, a team of astronomers proposed a new type of mission to crack some of the universe鈥檚 most intriguing mysteries and search for life on distant worlds.
To find life in the universe, it helps to know what it might look like. If there are organisms on other planets that do not rely wholly on photosynthesis 鈥� as some on Earth do not 鈥� how might those worlds appear from light-years away?
Planets with volcanic activity are considered better candidates for life than worlds without such heated internal goings-on.
Now, graduate students at the 91探花have found a way to detect volcanic activity in the atmospheres of faraway planets when they transit, or pass in front of their host stars.
Titan, Saturn’s largest moon, has a hazy atmosphere and surface rivers, mountains, lakes and sand dunes. But the dunes and prevailing surface winds don’t point in the same direction. New research from 91探花astronomer Benjamin Charnay may have solved this mystery.
Planets orbiting close to low-mass stars are prime targets in the search for life. But new research led by an astronomy graduate student at the 91探花indicates some such planets may have long since lost their chance at hosting life because of intense heat during their formative years.
Having a companion in old age is good for people 鈥� and, it turns out, might extend the chance for life on certain Earth-sized planets in the cosmos as well.
A fluctuating tilt in a planet’s orbit does not preclude the possibility of life, according to new research by astronomers at the 91探花, Utah’s Weber State University and NASA. In fact, sometimes it helps.
91探花astronomers have developed a new method of gauging the atmospheric pressure of exoplanets, or worlds beyond the solar system, by looking for a certain type of molecule. And if there is life out in space, it may one day be revealed by this method.
91探花astronomer Eric Agol played a key role in the windfall of 715 new exoplanets recently announced by NASA. Agol was on a team that found seven of those worlds, all in orbit around the same star.
The mystery of how the surface of Mars, long dead and dry, could have flowed with water billions of years ago may have been solved by research that included a 91探花 astronomer.
It might be easier than previously thought for a planet to overheat into the uninhabitable “runaway greenhouse” stage, according to new research.
In a bit of cosmic irony, planets orbiting cooler stars may be more likely to remain ice-free than planets around hotter stars. This is due to the interaction of a star鈥檚 light with ice and snow on the planet鈥檚 surface.
A 91探花astronomer is using Earth’s interstellar neighbors to learn the nature of certain stars too far away to be directly measured or observed, and the planets they may host.
91探花astronomers find that planets orbiting white and brown dwarfs are unlikely to be good candidates for sustaining life.
With the recent landing of NASA’s Curiosity rover on Mars, for the third time a timepiece assembled at the 91探花 has found a home on the Red Planet.