Sky & Telescope - USA (2020-06)
LEAH TISCIONE / S&T skyandtelescope.org • JUNE 2020 59 Astronomers are illuminating the universe’s early days by studying ch ...
The First Stars 60 JUNE 2020 • SKY & TELESCOPE rial seeded by many generations of earlier stars. Our Sun is a Pop I star. It ...
skyandtelescope.org• JUNE 2020 61 suggested the star’s iron fraction is at most^11 / 13 13 million million that of the Sun. Spec ...
The First Stars 62 JUNE 2020 • SKY & TELESCOPE MAKING THE OLDEST STARS GREGG DINDERMAN / S&T (2) Based on the chemi- cal ...
skyandtelescope.org• JUNE 2020 63 According to Frebel, a coauthor on the study, “In some ways, an asymmetric core-collapse super ...
The First Stars 64 JUNE 2020 • SKY & TELESCOPE A Faint Hope While most models of Pop III stars suggest they should have expi ...
skyandtelescope.org • JUNE 2020 65 shopatsky.com Sky & Telescope’s Pocket Sky Atlas – Jumbo Edition M29 α β χ δ ε φ γ η ι λ ...
ALL IMAGES COURTESY OF THE AUTHOR UNLESS OTHERWISE NOTED; M87 JET: NASA / ESA / THE HUBBLE HERITAGE TEAM (STSCI / AURA) ELECTRON ...
skyandtelescope.org • JUNE 2020 67 objects were, big and beautiful. That night convinced me video was the cure for my observing ...
Electronic Observing 68 JUNE 2020 • SKY & TELESCOPE edge-of-fi eld optical performance usually isn’t a concern. There will b ...
skyandtelescope.org• JUNE 2020 69 pOFF-SCOPE GEAR From left to right, the author’s laptop computer, video display (a portable DV ...
challenge even for an amateur astrono- mer equipped with a large Dobsonian telescope. Could my relatively modest 11-inch SCT sho ...
NEW PRODUCT SHOWCASE skyandtelescope.org • JUNE 2020 71 uIMAGING PACKAGE Software Bisque announces a new software package for ad ...
ASTRONOMER’S WORKBENCH by Jerry Oltion Finder Finders Here’s a wide-fi eld helper that puts you in the ballpark. THOSE OF US WHO ...
qRight-angle fi nders are a bit more diffi cult to modify because the eyepiece is in the way, but there’s usually room for a pai ...
74 JUNE 2020 • SKY & TELESCOPE SHARPLESS 2-25 Alex Roberts The Lagoon Nebula (M8) in Sagittarius is one of only two emission ...
skyandtelescope.org • JUNE 2020 75 ...
uSHARPLESS 2-220 Ron Brecher The energetic star Xi (ξ) Persei (lower right) fl u- oresces gas in the California Nebula, NGC 1499 ...
skyandtelescope.org• JUNE 2020 77 Gallery showcases the fi nest astronomical images that our readers submit to us. Send your bes ...
ACCESSORIES Place Your essential source for astronomical products Market BOOKS 78 JUNE 2020 • SKY & TELESCOPE Much, much mor ...
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