"For years, he had the field of planetary formation, which he had created, virtually to himself. Most Soviet colleagues were skeptical and uninterested; his research appeared so speculative, so far removed from any evidence."
With the ringed planet currently perfectly positioned for observation with a small telescope, relive Voyager 2's landmark 1981 visit.
NASA's James Webb Space Telescope has detected potential traces of dimethyl sulfide, a chemical only known to be created by phytoplankton on Earth, in the atmosphere of an exoplanet believed to have its own liquid ocean.
Researchers have shown that if the James Webb Space Telescope was pointed at Earth from a distant star, it could detect the signatures of intelligent life in our planet's atmosphere.
One researcher hypothesizes that experiments carried out by NASA's Viking landers in 1976 could have inadvertently killed microbes living in Martian rocks. Other experts are skeptical.
Researchers estimated that as few as 22 people would be needed to sustain a colony on Mars. But there are lots of caveats, and the new study largely misses the point of colonizing the Red Planet in the first place, experts say.
Scientists are still in the dark about what is causing a huge shadowy patch to appear against the blue background of Neptune’s sky.
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