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Bad Astronomy | Dark matter rmay cause exoplanets to heat up and glow, betraying its presence


We know that dark matter exists, but, irritatingly, we don’t know what it is.
One way to figure that out is to look for signs of it here on Earth, using subatomic particle detectors. But a new idea just published in a scientific journal is that we need to go bigger. A lot bigger: Using
entire exoplanets as detectors.
I give them points for thinking originally, for sure.
matter directly. It affects the way galaxies rotate, the way galaxies behave in clusters, the way clusters affect the light of objects behind them, and a host of other things, too. We know it exists. And over the decades people have looked for it, but almost everything that could possibly work has been eliminated. It’s not teeny black holes, or rogue planets, or cold gas. Nothing made of normal matter works, leaving only “exotic” subatomic particles like axions as candidates. Attempts have been made to look for those, too, but so far zip. ....

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Jupiter looks stunning in three different wavelengths of light on one day


Jupiter looks stunning in three different wavelengths of light on one day
CNET
5/13/2021
Amanda Kooser
© Provided by CNET
This image shows Jupiter as seen in infrared by Gemini North, visible light by Hubble and ultraviolet, also from Hubble. International Gemini Observatory/NOIRLab/NSF/AURA/NASA/ESA, M.H. Wong and I. de Pater (UC Berkeley) et al.
We typically see images of Jupiter in visible light that gives it a swirly beige, orangish and reddish appearance. But when telescopes look at the gas giant in other wavelengths of light, different features pop out. 
The Gemini North telescope in Hawaii teamed up with NASA and ESA s Hubble Space Telescope to view Jupiter at the same time. Gemini North picked up an infrared image while Hubble handled visible light and ultraviolet light. Seen together, the three views show off the many moods of stormy Jupiter. ....

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