Voyager spacecraft detects 'persistent hum' beyond our solar system

By Amy Woodyatt, CNN

Updated 1846 GMT (0246 HKT) May 11, 2021

Two new missions to Venus -- DAVINCI+ and VERITAS -- have been selected by NASA. These missions will shed light on how Venus became the inhospitable world it is today, despite the fact that it shares many characteristics with Earth.
Photos: Cool unmanned space missions
Two new missions to Venus -- DAVINCI+ and VERITAS -- have been selected by NASA. These missions will shed light on how Venus became the inhospitable world it is today, despite the fact that it shares many characteristics with Earth.
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This illustration shows the position of NASA's Voyager 1 and Voyager 2 probes outside the heliosphere, a protective bubble created by the sun that extends well past the orbit of Pluto.
Photos: Cool unmanned space missions
This illustration shows the position of NASA's Voyager 1 and Voyager 2 probes outside the heliosphere, a protective bubble created by the sun that extends well past the orbit of Pluto.
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SPHEREx, the Spectro-Photometer for the History of the Universe, Epoch of Reionization and Ices Explorer, will study the beginning and evolution of the universe and determine how common the ingredients for life are within the planetary systems found in our galaxy, the Milky Way. It is targeted to launch in 2024.
Photos: Cool unmanned space missions
SPHEREx, the Spectro-Photometer for the History of the Universe, Epoch of Reionization and Ices Explorer, will study the beginning and evolution of the universe and determine how common the ingredients for life are within the planetary systems found in our galaxy, the Milky Way. It is targeted to launch in 2024.
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This illustration shows NASA's Dragonfly rotorcraft-lander approaching a site on Saturn's exotic moon, Titan. Taking advantage of Titan's dense atmosphere and low gravity, Dragonfly will explore dozens of locations across the icy world, sampling and measuring the compositions of Titan's organic surface materials to characterize the habitability of Titan's environment and investigate the progression of prebiotic chemistry.
Photos: Cool unmanned space missions
This illustration shows NASA's Dragonfly rotorcraft-lander approaching a site on Saturn's exotic moon, Titan. Taking advantage of Titan's dense atmosphere and low gravity, Dragonfly will explore dozens of locations across the icy world, sampling and measuring the compositions of Titan's organic surface materials to characterize the habitability of Titan's environment and investigate the progression of prebiotic chemistry.
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NASA's Wide Field Infrared Survey Telescope, slated to launch in the mid-2020s, has been named the Nancy Grace Roman Space Telescope, after NASA's first chief astronomer.
Photos: Cool unmanned space missions
NASA's Wide Field Infrared Survey Telescope, slated to launch in the mid-2020s, has been named the Nancy Grace Roman Space Telescope, after NASA's first chief astronomer.
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This is an artist's concept of the Europa Clipper spacecraft, which will investigate Jupiter's icy moon.