Astronomy - USA (2021-12)
WWW.ASTRONOMY.COM 41 Giuseppe Piazzi showed, based on repeated observations, that 61 Cygni was moving noticeably against the bac ...
42 ASTRONOMY • DECEMBER 2021 the stars’ motions, astronomers proved they were orbiting each other according to Newton’s law of g ...
WWW.ASTRONOMY.COM 43 about four times the mass of our Sun; it shines with intensely blue-white light. Astronomers long wondered ...
To chase down the Moon’s shadow this month, you’ll need to put yourself on ice. BY MICHAEL E. BAKICH 44 ASTRONOMY • DECEMBER 202 ...
WWW.ASTRONOMY.COM 45 Two travelers observe the early-morning Sun as it hangs over the mountains near Antarctic Logistics & E ...
46 ASTRONOMY • DECEMBER 2021 (^1) m (^0) s (^1) m (^15) s (^1) m (^30) s (^1) m (^35) s (^1) m (^15) s (^1) m (^0) s EC LIP SE E ...
WWW.ASTRONOMY.COM 47 (^1) m (^40) s 1 m^50 s 1 m 45 s 1 m 0 s 1 m 15 s 1 m 30 s 1 m 35 s^1 m 0 s 1 m 15 s 1 m 45 s 1 m 40 s ECLI ...
48 ASTRONOMY • DECEMBER 2021 AS BRILLIANT AND SPLENDID AS VENUS IS to the naked eye, the world often ranks as one of astronomy’s ...
CLOCKWISE FROM ABOVE: Francesco Bianchini adjusts the eyepiece of a small aerial telescope while observing Venus. PIER LEONE GHE ...
50 ASTRONOMY • DECEMBER 2021 contributed to Lowell’s nervous break- down when he came back from Mexico. Nonetheless, he held for ...
WWW.ASTRONOMY.COM 51 Wilson in 1954 also brought nothing new. It was 30 years before anyone added anything significant to Ross’ ...
52 ASTRONOMY • DECEMBER 2021 Venera 4 spacecraft probed Venus’ atmo- sphere for the first time, Carl Sagan and Howard Morowitz p ...
WWW.ASTRONOMY.COM 53 perhaps microorganisms on Venus evolved along with the changing condi- tions in the atmosphere. As Ian Malc ...
Even though time has existed since the beginning of, well, time, it was still necessary to invent it. BY RAYMOND SHUBINSKI TIME ...
employed Sosigenes to fix the old Roman lunar calendar. By Caesar’s time, the lunar calen- dar had become so out of sync with th ...
show the hour. By the 13th century, astronomer monks were creating complex move- ments with dials that had an hour hand and disp ...
Naval Observatory in Wa sh i ng ton, D.C. As telegraphs encircled the globe, it became possible to transmit time signals. In 183 ...
58 ASTRONOMY • DECEMBER 2021 Stellarvue’s SVX 102T T he 4-inch refractor has been a favorite of astronomy enthusiasts for countl ...
WWW.ASTRONOMY.COM 59 telescope Stellarvue manufactures comes with its own color interferometric test report taken at full apertu ...
60 ASTRONOMY • DECEMBER 2021 BINOCULAR UNIVERSE Back in the March issue, we visited the eastern portion of one of the sky’s most ...
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