Sky & Telescope - USA (2019-09)

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Event Horizon Telescope 20 SEPTEMBER 2019 • SKY & TELESCOPE Instead, the EHT’s worldwide team of researchers, comprising 200 ...

skyandtelescope.com • SEPTEMBER 2019 21 Although the images of M87* are derived from only four days of observations, EHT scienti ...

Event Horizon Telescope 22 SEPTEMBER 2019 • SKY & TELESCOPE puter scientist Katie Bouman (now Caltech), if there were an ele ...

skyandtelescope.com • SEPTEMBER 2019 23 Shadow diameter (microarcseconds) S ou rc e^ st re ng th a t^1 .^3 m m (j an sk ys ) 0.1 ...

THE LITTLE ROVER THAT COULD by Shannon Hall 24 SEPTEMBER 2019 • SKY & TELESCOPE Opportunity’s End The Martian rover’s specta ...

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The Little Rover That Could 26 SEPTEMBER 2019 • SKY & TELESCOPE started to exercise more extreme measures, sending Opportu- ...

skyandtelescope.com • SEPTEMBER 2019 27 command that were harder. For more than a decade, the day- to-day lives of these scienti ...

The Little Rover That Could 28 SEPTEMBER 2019 • SKY & TELESCOPE planned the previous day was successful and you see a new pi ...

skyandtelescope.com • SEPTEMBER 2019 29 A Shortlist of Rover Discoveries Both Spirit and Opportunity penned a new story of Mars ...

PLANETARY NEBULAE by Ted Forte 30 SEPTEMBER 2019 • SKY & TELESCOPE THE CAT’S EYE NEBULA NGC 6543 is a gem of a planetary neb ...

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Planetary Nebulae 32 SEPTEMBER 2019 • SKY & TELESCOPE Planetary. A disklike halo surrounds a bright central star. Concentrat ...

uTHE BLINKING PLANETARY Top: This Hubble Space Telescope image of NGC 6826 reveals several phenomena associated with dying stars ...

Planetary Nebulae 34 SEPTEMBER 2019 • SKY & TELESCOPE very best of conditions, brighter knots high- light the ends of the ha ...

skyandtelescope.com • SEPTEMBER 2019 35 two or three dark patches. Noted planetary nebula observer Kent Wallace describes the in ...

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CR UIS E^ S HIP :^ S EA N^ W AL KE R^ / S& T pVENUS RISING This 8-second exposure recorded through a 35-mm f/1.4 lens captur ...

Photo Op Ahoy 38 SEPTEMBER 2019 • SKY & TELESCOPE Moon or the solar corona during a total solar eclipse. This lens is also e ...