Astronomy - 06.2019

WWW.ASTRONOMY.COM 61 distorted the views of celestial objects. So, his next endeavor was to build a refractor, and he has been b ...

62 ASTRONOMY • JUNE 2019 Additionally, triplet APO 4.8-inch and 7.2-inch refractors are in the works for release later this year ...

WWW.ASTRONOMY.COM 63 uncommonly high optical standards. Customers can expect triplet lenses to have Strehl ratios of 0.98 or 0.9 ...

64 ASTRONOMY • JUNE 2019 O n July 2, 2019, a total solar eclipse will be visible over parts of Chile and Argentina just before s ...

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Curious about space? Curiosity’s Martian Selfi e, Aug. 5, 2015. Photo Credit: NASA/JPL- Caltech/Space Science Institute ...

Intensity Hydrogen absorption spectrum Wavelength (nm) 400 500 600 700 68 ASTRONOMY • JUNE 2019 A: The solar wind is composed of ...

WWW.ASTRONOMY.COM 69 light that is absorbed can also provide information about how much of each element is present. The more ele ...

70 ASTRONOMY • JUNE 2019 ONE YEAR OF MARS This sequence resulted from nearly 100 imaging sessions, and those don’t count the pr ...

WWW.ASTRONOMY.COM 71 3 4 Diameter = 18.3" Magnitude = –1.7 Diameter = 13.7" Magnitude = –1.0 Diameter = 6.9" Magnitude = 0.6 Aug ...

72 ASTRONOMY • JUNE 2019 NIGHTS OF THE COMET Comet C/2016 R2 (PANSTARRS) evolved as these images were captured; specifically, t ...

WWW.ASTRONOMY.COM 73 TRANSFORMATION Asteroid (6478) Gault was discovered in 1988 and was classified as a main belt asteroid — o ...

74 ASTRONOMY • JUNE 2019 An ancient city of stars This tightly packed ball of colorful suns sparkles deep in Earth’s southern sk ...

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SOUTHERN SKY MARTIN GEORGE describes the solar system’s changing landscape as it appears in Earth’s southern sky. August 2019: G ...

STAR DOME _ ` a ` b _ OCTANS CRUX CENTAURUS NORMA LUPUS LIBRA SERPENS CAPUT SERPENS CAUDA OPHIUCHUS HERCULES LY R A VULPECULA CY ...

DELPHINUS EQUULEUS AQUARIUS PISCISAUSTRINUS PHOENIX MIC GRUS Fo m alhaut M15 En if E AUGUST 2019 Calendar of events 1 New Moon o ...