JANDL100

Random astronomy things

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What a totally stunning photo by the Hubble Space Telescope. 

A section of the blast wave surrounding the remnant of a supernova. 

https://www.sciencealert.com/hubble-s-new-photo-of-the-cygnus-loop-is-giving-us-some-serious-feelings

Edited by JANDL100
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Nexus....????

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This is a bit astonishing. 

The first planet directly-ish observed (probably) in another galaxy. 

It's a Saturn sized planet orbiting and regularly occluding a binary star X-ray source in M51, the Whirlpool galaxy. 

Possibly. 

https://arxiv.org/abs/2009.08987#:~:text=M51-ULS-1b has a,1%2C is young and massive.

Edited by JANDL100
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8.6 Megaparsecs from Earth !

Might need to top the tank up .

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Several sub-surface salty water lakes have been discovered by radar on Mars under the south pole. The largest is 18x12 miles, other smaller lakes surround it and seem to be isolated from it. 

Difficult to get at though as there is over a km of ice above them. 

Mars used to have a much warmer climate so they may be remnants of extensive surface water seas. 

https://www.space.com/mars-hiding-salty-subsurface-lakes

Edited by JANDL100

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Posted (edited)

Using gravitational micro-lensing techniques a "rogue" Earth mass planet may have been found in our Milky Way galaxy that has been ejected from its parent star. 

For a period of just over 40 minutes the newly found planet with a likely size somewhere between that of Mars and Earth just happened to pass between us and a much more distant star. When it did that its gravitational field very slightly caused the light from the distant star to bend around it, and 2 telescopes managed to catch it in the act. A very rare event, but the telescopes were designed just for this purpose. 

https://phys.org/news/2020-10-rogue-earth-mass-planet-freely-milky.html

Edited by JANDL100

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^ Could have been a death star on the move xD

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This idea strains credulity somewhat.

"Looking for the Shadows of Trees On Exoplanets to Detect Multicellular Life"
... using imaging where, as is quite likely for the near future, you only have a single pixel encompassing the exoplanet.

Apparently, tree shadows have a reasonably unique reflectance signature.
Who knew?
And it may be possible to categorise that from a single pixel.
Hmm!

www.universetoday.com/148164/heres-a-clever-idea-looking-for-the-shadows-of-trees-on-exoplanets-to-detect-multicellular-life/

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A short but interesting article about the research leading to the discovery of the supermassive black hole at the centre of our galaxy that led to the shared award of this year's Nobel Prize for physics for Andrea Ghez. 

https://astrobites.org/2020/10/13/the-nobel-prize-in-physics-2020-andrea-ghez/

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Astronomers Report That Venus' Atmosphere Contains an Amino Acid Found in DNA

In their paper, the authors write "Its detection in the atmosphere of Venus might be one of the keys to understanding the formation mechanisms of prebiotic molecules in the atmosphere of Venus. The upper atmosphere of Venus may be going through nearly the same biological method as Earth billions of years ago."

But it's a very long way short of firm evidence for life in the clouds of Venus, but it makes an intriguing additional piece of data following the identification of phosphine (a less ambiguous bio-marker) in the same atmospheric regions. 

https://www.sciencealert.com/astronomers-report-they-ve-detected-an-amino-acid-found-in-dna-in-venus-atmosphere

Edited by JANDL100

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On its way to the planet Mercury the Bepi- Colombo probe does a flyby of Venus. 

Say 'Hi' to the microbes that may be living in the clouds. 

https://news.google.com/articles/CAIiEKMO3fvVuSRQsPvWSDxH21oqMwgEKioIACIQiaYKTaVj4jekEifjHCx8jCoUCAoiEImmCk2lY-I3pBIn4xwsfIww37rKBg?hl=en-GB&gl=GB&ceid=GB%3 enjoy

image.thumb.png.a82c40148b3ce8c191610032e288530d.png

Edited by JANDL100
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