Astronomy - USA (2019-09)

COM BOÖ SER VIR LIB LUP SCO ARA TEL SGR SCT AQL SER OPH HER LY R CYG VUL SGE ANT CEN CRV CRT HYA SEX LEO CVn UMa CrA LMi CrB Pat ...

WHEN TO VIEW THE PLANETS EVENING SK Y Mercury (west) Venus (west) Jupiter (southwest) Saturn (south) Neptune (east) MIDNIGHT Sat ...

1° Path of Ceres Sept 1 6 11 16 21 26 Oct 1 SCORPIUS OPHIUCHUS Antares o t l k m N E September 4, 10:30 P.M. EDT Dione Te t h y ...

44 ASTRONOMY • SEPTEMBER 2019 IN 1908, WHEN PERCIVAL LOWELL PUBLISHED Mars as the Abode of Life, he saw the Red Planet as surely ...

WWW.ASTRONOMY.COM 45 Life in the SOLAR SYSTEM drain into liquid-filled basins, some as large as the terrestrial seas. Titan’s la ...

Inset area Apr. 2007 Jul. 2013 Aug. 2014 Jan. 2015 Kraken Mare North pole Ligeia Mare Punga Mare 46 ASTRONOMY • SEPTEMBER 2019 O ...

Krak en^ Ma re Specular Wet-sidewalk effect reflection Clouds High-pressure^ ice^ shell Hydrated^ silicate^ core Global subsurfa ...

TITAN’S ATMOSPHERE A lt it u d e (^) West North East South 100 miles (160 km) 20 miles (32 km) 5 miles (8 km) 1 mile (1.6 km) 1, ...

WWW.ASTRONOMY.COM 49 environment, such as imbalances or cycles of gas levels. Second, in examining surface materials, a lander w ...

Life in the SOLAR SYSTEM ENCELADUS, NAMED AFTER one of the Giants in Greek mythology, has an icy surface that reflects 81 percen ...

WWW.ASTRONOMY.COM 51 This tiny saturnian moon may be, pound for pound, the most valuable piece of real estate in the solar syste ...

180° 90° 0° 270° A le x a n d ri a C a ir o B ag hd ad D a m a sc u s 52 ASTRONOMY • SEPTEMBER 2019 But was it really an under- ...

Hot plasma flow Neutral cloud Radioisotope thermoelectric generator Huygens Titan probe Fields and particles pallet Radar bay Lo ...

Water-rock reactions Hydrothermal vents Surface jets Ice shell Ocean Rocky core Ice-coated particles South polar region Brittle ...

WWW.ASTRONOMY.COM 55 Aerosols on Earth boast organic molecules enriched hundreds to thousands of times over typical ocean concen ...

What lies beneath Life in the SOLAR SYSTEM TRITON’S ...

WWW.ASTRONOMY.COM 57 Neptune’s moon Triton shows tantalizing evidence of water beneath its jumbled crust, making it a high-prior ...

Jupiter Earth Venus Tr i to n 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 April 15 – May 5, 2026 Launch Oct ...

59 directly overhead. As sunlight heated the ices, nitrogen could have jumped from solid to gas to become the plumes. With the d ...

60 ASTRONOMY • SEPTEMBER 2019 ocean, samples of the interior may lie on the moon’s surface, ripe for the taking. Together, these ...