Astronomy

Vid: Ponder the exacting systems engineering, reliability testing, required qualifications and multiple i/o instrumentation and control involved. Observe the precise, corrective jets to keep the process under control. This, is how a good future is going to be built: near earth colonisation and Lunar colonisation are the first stages to Solar system colonisation. (Note, they are expected to remain on the ISS for 30 – 119 days.) Blue Danube is extra, but it speaks to the cultural patterns that lie behind that precise docking exercise and all the rich promise it reflects. END

vid: A new beginning. END

Typical images of the solar system are NOT to scale, showing the planets at grossly exaggerated sizes. Here is a typical case, HT Wikimedia, WP and Planet User: So, some video makers did a little project to show it to scale, out to Neptune . . . beyond, lies vastly more of course, but Pluto has been demoted to “dwarf planet.” Video: A Pandemic Sunday reflection from scripture comes to mind: Psalm 19:1The heavens declare the glory of God; and the firmament sheweth his handywork.2 Day unto day uttereth speech, and night unto night sheweth knowledge.3 There is no speech nor language, where their voice is not heard. 4 Their line is gone out through all the earth, and their words to the Read More ›

If you are in the southern hemisphere, as were the ESO (European Southern Observatory) astronomers: The pair of stars in a system called HR 6819 is so close to us that on a clear night in the Southern Hemisphere, a person might be able to spot them without a telescope. What that stargazer wouldn’t see, though, is the black hole hiding right there in the constellation Telescopium. At just 1,000 light-years away, it is the closest black hole to Earth ever discovered, and it could help scientists find the rest of the Milky Way’s missing black holes. Megan Gannon, “Astronomers Discover the Closest Known Black Hole” at Smithsonian Magazine It was discovered by accident: The scientists originally became interested in Read More ›

. . . and that, at about the suggested time for an up-turn. Astronomy telegram clip: >>The Fall and Rise in Brightness of Betelgeuse ATel #13512; Edward Guinan, Richard Wasatonic (Villanova University),Thomas Calderwood (AAVSO) and Donald Carona (Texas A& M University) on 22 Feb 2020; 12:59 UTCredential Certification: Edward Guinan (edward.guinan@villanova.edu) As previously reported (see ATel #13365, #13410 and #13439), the red supergiant Betelgeuse has been undergoing an unprecedented decrease in its visual (V) brightness since October 2019. Photometry secured over the last ~2 weeks shows that Betelgeuse has stopped its large decline of delta-V of ~1.0 mag relative to September 2019. The star reached a mean light minimum of = 1.614 +/- 0.008 mag during 07-13 February 2020. This Read More ›

Mebbe, for now. According to Forbes: >>The red supergiant star Betelgeuse appears to have finally stopped its unprecedented dimming, Villanova University astronomer Edward Guinan told me [ Bruce Dorminey] this afternoon. He says that although he’s unsure what has caused its strange brightness fluctuations, Betelgeuse is not likely to undergo a supernova explosion anytime soon.  “The star has been nearly steady in brightness now over the last 10 days,” said Guinan. We could be at minimum brightness now and very soon the star will slowly brighten if it follows its normal 420 to 430 period of pulsation, says Guinan. Or when the star periodically changes its  brightness, he says. >> Of course, supernova fans are still rooting for a big boom. Read More ›

Since about October 2019, Betelgeuse (the bright reddish star at Orion’s shoulder in the brightest constellation in the sky that is about 600 – 700 ly distant from us) has begun a sharp dimming that has now gone beyond what has been seen in modern observations. As of the end of January, it was down about 2.5 1.4 in apparent magnitude (corrected from the added graph). Here is its “portrait” — it is one of the few stars we have seen as a disk: ADDED: a plot of apparent magnitude: Discussion at WUWT suggests that by about Feb 21 we should see an uptick if this is something that is near-normal. Odds are, we don’t have a long enough instrumented Read More ›