Amazing images of the far reaches of the universe are everywhere, but are they accurate? What does space really look like?
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‘Habitable’ Exoplanets Might Not Be Very Earth-Like After All
“One of the most exciting moments in exoplanet science came in late February, when NASA’s Spitzer Space Telescope announced the discovery of seven rocky planets orbiting in or near the habitable zone of their parent star, TRAPPIST-1, which lies 40 light years away from Earth.
‘The discovery sets a new record for greatest number of habitable-zone planets found around a single star outside our solar system,’ NASA said in a statement.”
The Electromagnetic Spectrum
“The electromagnetic (EM) spectrum is the range of all types of EM radiation. Radiation is energy that travels and spreads out as it goes – the visible light that comes from a lamp in your house and the radio waves that come from a radio station are two types of electromagnetic radiation. The other types of EM radiation that make up the electromagnetic spectrum are microwaves, infrared light, ultraviolet light, X-rays and gamma-rays.”
Truth Behind the Photos: What the Hubble Space Telescope Really Sees
“When Hubble beams down images, astronomers have to make many adjustments, such as adding color and patching multiple photos together, to that raw data before the space observatory’s images are released to the public. Hubble doesn’t use color film (or any film at all) to create its images. Instead, it operates much like a digital camera, using what’s called a CCD (charge-coupled device) to record incoming photons of light.”
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Special thanks to Amy Shira Teitel for hosting and writing this episode of Seeker!
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