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Proxima Centauri b is the closest exoplanet to Earth, [19] at a distance of about 4.2 ly (1.3 parsecs). [4] It orbits Proxima Centauri every 11.186 Earth days at a distance of about 0.049 AU, [1] over 20 times closer to Proxima Centauri than Earth is to the Sun. [20] As of 2021, it is unclear whether it has an eccentricity [e] [23] but Proxima Centauri b is unlikely to have any obliquity. [24]
English: This image of Earth’s city lights was created with data from the Defense Meteorological Satellite Program (DMSP) Operational Linescan System (OLS). Originally designed to view clouds by moonlight, the OLS is also used to map the locations of permanent lights on the Earth’s surface.
Successive assists at α Cen A and B could allow travel times to 75 yr to both stars. The light sail has a nominal mass-to-surface ratio (σ nom) of 8.6×10 −4 gram m −2 for a nominal graphene-class sail. Area of the light sail, about 10 5 m 2 = (316 m) 2; Velocity up to 37,300 km s −1 (12.5% c)
NASA astronaut Matthew Dominick shared footage taken from the International Space Station capturing the reflection of auroras and city lights. Watch as time-lapse video captures solar arrays ...
The planet, dubbed Proxima b because it orbits Proxima Centauri, is thought to be a rocky and slightly more massive than Earth -- but that's not all. Scientists discover Earth-like planet orbiting ...
Work by astronomer Thomas Beatty has shown that the spectrally concentrated emission from sodium street lights would be distinguishable from natural sources using proposed next generation space telescopes. The proposed LUVOIR A may be able to detect city lights twelve times those of Earth on Proxima b in 300 hours. [33]
The James Webb Space Telescope captured images of 19 spiral galaxies in near- and mid-infrared light. - NASA, ESA, CSA, STScI, Janice Lee (STScI), Thomas Williams (Oxford), PHANGS Team.
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