Sky & Telescope - USA (2019-11)
skyandtelescope.com • NOVEMBER 2019 19 Fraction of light blocked by dust Sun 9,000 – 6,000 –3,000 0 3,000 6,000 9,000 Distance ...
Spiraling In 20 NOVEMBER 2019 • SKY & TELESCOPE 270° 300° OUR GALAXY The Milky Way has a few main arms and several smaller o ...
skyandtelescope.com • NOVEMBER 2019 21 Pe rs eu s A rm O u te r A rm Sag itt ar iu s^ A rm Far^ 3 kp c^ A rm Ne ar 3 kp c^ A rm ...
Spiraling In 22 NOVEMBER 2019 • SKY & TELESCOPE Both these great arms, he explains, possess not only gas and young stars but ...
skyandtelescope.com • NOVEMBER 2019 23 The molecular clouds reside beyond even the Outer Arm, lying 46,000 to 71,000 light-years ...
STELLAR FAÇADES by Christopher Crockett 24 NOVEMBER 2019 • SKY & TELESCOPE Astronomers are linking arrays of telescopes toge ...
pMOTTLED STAR This surface map of the star Zeta Andromedae reveals a giant spot at the star’s north pole (top) and multiple spot ...
Stellar Façades 26 NOVEMBER 2019 • SKY & TELESCOPE on the Canary Island of La Palma, is 10.4 meters (34.1 feet) across and c ...
skyandtelescope.com • NOVEMBER 2019 27 retirement years (and with yet another pattern of spots). The location is fi tting — next ...
Stellar Façades 28 NOVEMBER 2019 • SKY & TELESCOPE get their shape, the researchers did see vast bubbles of plasma on the su ...
skyandtelescope.com • NOVEMBER 2019 29 eration is not cheap,” he says. “The science we can do can be pretty incredible if we can ...
EN CY CL OP AE DIA BR ITA NN ICA /^ U NIV ER SA L^ IM AG ES GR OU P^ / GE TT Y^ I MA GE S 30 NOVEMBER 2019 • SKY & TELESCOPE ...
TH E^ S IDE RE AL M ES SE NG ER (J UL Y^1 84 6 )^ /^ PU BL IC^ DO MA IN^ /^ C OU RT ES Y^ O F^ A UT HO R tSPREADING LIGHT Ground ...
O. M. Mitchel 32 NOVEMBER 2019 • SKY & TELESCOPE while he studied law. In 1831, he married Louisa Clark Trask, the young wid ...
skyandtelescope.com • NOVEMBER 2019 33 was formed, offi cers were elected, a constitution was adopted, and Mitchel was directed ...
O. M. Mitchel 34 NOVEMBER 2019 • SKY & TELESCOPE Neither his projector nor the images for it survives, so we don’t know exac ...
skyandtelescope.com • NOVEMBER 2019 35 his troops as “Old Stars” because of his fame as an astrono- mer — with protecting the Un ...
SCRUBBING DATA by Ron Brecher 36 NOVEMBER 2019 • SKY & TELESCOPE This important step will dramatically improve your imaging ...
AL L^ IM AG ES BY TH E^ A UT HO R skyandtelescope.com • NOVEMBER 2019 37 J ust fi ve words is all it takes to highlight one of t ...
Scrubbing Data 38 NOVEMBER 2019 • SKY & TELESCOPE with multiple fi lters, dust motes may be in a different place on each fi ...
«
1
2
3
4
5
»
Free download pdf