Astronomy - USA (2019-09)

WWW.ASTRONOMY.COM 61 TRITON’S THIN ATMOSPHERE is composed of nitrogen and methane. During its flyby, Voyager 2 spotted limb clou ...

Life in the SOLAR SYSTEM ...

WWW.ASTRONOMY.COM 63 Who would have thought this dwarf planet could nurture life? The idea seemed ludicrous before New Horizons ...

64 ASTRONOMY • SEPTEMBER 2019 That leaves liquid water as the last hurdle to clear. As men- tioned earlier, radioactive decay wi ...

WWW.ASTRONOMY.COM 65 The second line of evidence concerns a feature that Pluto does not possess. Some bodies, like Earth’s Moon ...

implausibly thick nitrogen lay- ers, however, that contribution alone is not enough. One expla- nation points to a thinning of t ...

WWW.ASTRONOMY.COM 67 How can we confirm an ocean? Over the past two decades, scien- tists have used several techniques to look f ...

68 ASTRONOMY • SEPTEMBER 2019 BINOCULAR UNIVERSE Br i l l i a nt Ve ga i n Ly r a r u le s over the early evening sky t h i s mo ...

M A R K E T P L A C E WWW.ASTRONOMY.COM 69 [email protected] 949.215.3777 http://www.astrohaven.com Keeping it “Beautiful ...

70 ASTRONOMY • SEPTEMBER 2019 SECRET SKY Crisp September nights often bring high-contrast skies, which allows us to look up and ...

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M80 NGC 6144 M4 t t l o / i b m k SCORPIUS OPHIUCHUS LIBRA s Antares Sh 225 Graffias Sh 226 3° 72 ASTRONOMY • SEPTEMBER 2019 O ...

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74 ASTRONOMY • SEPTEMBER 2019 BREAKTHROUGH A GALAXY PAIR CRASH AND BURN Irregular galaxy NGC 4485 in Canes Venatici has only a s ...

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SOUTHERN SKY November 2019 Mercury transits the Sun Four planets adorn the western evening sky early this month. The constella- ...

AS G TI T A R UI S D E L P H IN U S E Q U U L E U S PE GA SU S ANDROM EDA TRIANGUL UM CETU S ACSUM AIRT UGN MUL TSUA LAR E C O R ...

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