Didn't really know where to put this at first, but it really should go here despite the title.
TESS Photometric Mapping of a Terrestrial Planet in the Habitable Zone: Detection of Clouds, Oceans, and Continents https://arxiv.org/pdf/1903.12182.pdf
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Explorer1
Apr 1 2019, 04:37 AM
That's a lot of effort for an April fool's joke! A nice easter egg with the coordinates in the Conclusions section too!
Steve5304
Apr 1 2019, 03:34 PM
Looks like an april fools to me. "Sol D" being earth itself...
But i may have missed the point. ill admit i did not read entire thing.
mcaplinger
Apr 1 2019, 04:43 PM
QUOTE (Steve5304 @ Apr 1 2019, 07:34 AM)
But i may have missed the point. ill admit i did not read entire thing.
I think this is an actual data analysis using stray light from the Earth as seen in the TESS data. More or less pointless, but real.
I'll admit I didn't read the whole thing in detail either. If it's a joke it seems to be very long but not that funny.
JRehling
Apr 1 2019, 05:53 PM
This reminds me of the (much briefer) joke that David Grinspoon put into the title of a column once, something like, "Scientists discover earth-sized planet orbiting sunlike star!" and it was (an otherwise serious column) about Venus.
Xerxes
Apr 1 2019, 05:59 PM
I thought it was pretty funny, and also a neat science result, since they seem to be able to detect the Atlantic, Pacific and Southern oceans. Certainly one of the most startling discoveries since IceCube identified a potential satellite of Sol d.
nprev
Apr 2 2019, 04:16 AM
Very good! Gonna move this to Chit-Chat, though.
nprev
Apr 4 2019, 11:58 PM
Testing here. A member said that they were unable to post to this topic; anybody see this?
Ron Hobbs
Apr 5 2019, 12:24 AM
QUOTE (nprev @ Apr 4 2019, 04:58 PM)
Testing here. A member said that they were unable to post to this topic; anybody see this?
I see it.
PaulH51
Apr 5 2019, 12:54 AM
QUOTE (Ron Hobbs @ Apr 5 2019, 08:24 AM)
I see it.
I see it as well
nprev
Apr 5 2019, 01:35 AM
Thank you, gentlemen. Think we're okay, then.
dtolman
Apr 5 2019, 07:51 PM
Hopefully third time is the charm getting this post to show up on the site...
The article as posted may appear as a joke - but using Earth as a proxy to provide "ground truth" of how exo-planet Earth analogues would appear is a subject of real research - and as such this does constitute legitimate and useful research. As this article pointed out there are real pitfalls that scientists may not be aware of - for example depending on how the observation campaign is run may make a large impact in how the planet appears in the data (such as their inabiltity to distinguish in the instruments between temporary albedo features - clouds - and permanent landforms over short observation periods).