I’ve written a few times since yesterday about the Big Astronomy Reveal today. It’s going to be the subject of a live announcement from the Royal Astronomical Society in about an hour from this posting: at 11 a.m. Eastern time (US) and 4 p.m. BST.
As I suspected, It’s going to report the discovery of phosphine (PH3) in the atmosphere of Venus—presumably from the light spectrum—and since the compound is made on Earth only by organisms, this is said to be “evidence for life”. I am dubious, for, as J.B.S. Haldene said, nature is queerer than we can suppose. It would be arrogant to claim that we have exhausted all knowledge about how phosphine is produced.
There will of course be tons of speculation about life elsewhere in the Solar System, and that would be cool if it were true. We’ll just have to wait and see. At any rate, tune in here in one hour from this posting.