2019-08-01_Sky_and_Telescope

THE LX85 GEM SERIES OPT Telescopes | optcorp.comFocus Camera | focuscamera.com MeadeInstruments Astronomics | astronomics.com B& ...

PAGE 52 PAGE 84 PAGE 28 BLOWING BUBBLES: Wolf-Rayet Nebulae WHEN THE POLICE SHOW UP: Safety Tips for Observers EXPLORING THE MOO ...

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Apollo 11 Specifications: F.L.: 11mm A.F.o.V.: 85° Eye Relief: 19mm F.S. dia. (effective): 16.2mm Coatings: Glass matched multi- ...

2 BEGINNERS’ GUIDE Print out our free, 10-page handout to give out at star parties and other community events. skyandtelescope.c ...

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At Sky-Watcher we’re ready for the season with four complete lines of award- winning Dobs: Classic, Flextube, SynScan GoTo and S ...

CO UR TE SY OF ST EV E^ M AR SH AL L^ A ND AL BE LL G FROM OUR READERS “ Sinusoidal Tendencies You may have gotten this question ...

ºAugust 1944 Moon Rockets? “There are many experts who believe... that the day may not be far distant when we shall be exploring ...

NEWS NOTES A.^ TO NIT A,^ L.^ RE ZZ OL LA &^ F.^ P AN NA RA LE ONLY TWO MONTHS INTO a new observing run, gravitational-wave ...

MO ON :^ N AS A^ / GS FC /^ A RIZ ON A^ S TA TE UN IV.; OM EG A^ C EN TAU RI: ES O^ / IN AF VS T^ / O ME GA CA M^ /^ A CK NO W ...

NEWS NOTES 10 AUGUST 2019 • SKY & TELESCOPE ASTRONOMERS OBSERVING NEARBY interstellar space have fi nally detected helium hy ...

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NEWS NOTES STARS Astronomers Use Asteroids to Measure the Stars ASTRONOMERS USUALLY GLEAN information about an asteroid’s shape ...

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X-RAY EXPLORERS by Monica Young 14 AUGUST 2019 • SKY & TELESCOPE W alk outside tonight and you’ll see stars twinkling in the ...

skyandtelescope.com • AUGUST 2019 15 Turns out, Sco X-1 is the brightest endur- ing X-ray source outside the solar system. But t ...

X-ray Explorers 16 AUGUST 2019 • SKY & TELESCOPE emissions, such as Centaurus X-3: This source brightened and faded every 4. ...

skyandtelescope.com • AUGUST 2019 17 Among its discoveries, Ariel V provided a crucial measure- ment of the curious X-ray blobs ...