Conversation
What’s greener than being green? 532 nanometers! 💚
That’s the exact wavelength of #ICESat2’s six laser beams, which precisely measure the height of ice, water, vegetation, and more around the planet.
go.nasa.gov/3cb0bCC
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When atoms and molecules in Earth’s upper atmosphere get excited by sunlight, they glow green (and purple and red and yellow). Known as airglow, these swaths of colored light mark the region where Earth’s atmosphere meets space.
go.nasa.gov/37yEYoK
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Legend has it St. Patrick drove the snakes out of Ireland…did they make it all the way to space? 🐍
spotted NGC 2835 in the constellation Hydra. This “snake eye” galaxy has a supermassive black hole in its center.
go.nasa.gov/3MRdeM5
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🌳 Earth’s lush green forests play an important role in storing carbon. The GEDI instrument on the measures the height as well as the structure of forests, an important piece of monitoring how much carbon is stored around the planet.
go.nasa.gov/3te0TKh
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The Solar Dynamics Observatory sees the Sun in a variety of wavelengths to study parts of the Sun invisible to human eyes. One wavelength colorized in bright green captures light emitted by iron-18 (Fe XVIII) at temperatures of about 10.8 million °F.
go.nasa.gov/3q4NPos
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🌈 Looking for the pot of gold at the end of a rainbow? ’s mirrors are coated with a microscopically thin layer of gold, optimizing them to reflect infrared light, seeing beyond the visible rainbow to study light from the early universe.
youtube.com/watch?v=bUedD5
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