Australian Sky & Telescope - 04.2019

ASTRONOMY 2019 YEARBOOK Every astronomer needs the Astronomy 2019 yearbook. Australian-produced, it is packed full of essential ...

L INCONSTANT STAR by Linda French GOODRICKE: ROYAL ASTRONOMICAL SOCIETY John Goodricke and Edward Pigott discovered and interpre ...

http://www.skyandtelescope.com.au 23 and fifth magnitude, both men observed the star every clear night. Neither saw another dimm ...

Covered with spots Thestarspothypothesismayseem strangetomodernminds.Howcould alargeandapparentlypermanent spot cause the bright ...

http://www.skyandtelescope.com.au 25 Epilogue: Searching for John Goodricke How did a young man with such a serious handicap ach ...

ESA / NASA / JPL / UNIVERSITY OF ARIZONA Saturn’s largest moon has a remarkably complex atmosphere, with all the chemical ingred ...

MOLECULE ICONS: GREGG DINDERMAN / S&T ORGANICS Anorganiccompound is any molecule that contains carbon bonded to hydrogen. Th ...

28 AUSTRALIAN SKY & TELESCOPE April 2019 theorganicchemistryoccurringinTitan’satmospherewas complex, we knew we needed to st ...

http://www.skyandtelescope.com.au 29 whenitwasdesigned(C 2 N 2 ,withanatomicmassof52)and theheaviestmoleculediscoveredbeforeCass ...

30 AUSTRALIAN SKY & TELESCOPE April 2019 units.Thatmeansthat,insteadofrecording ionisedmoleculesconsistingofsixorsevenheavy ...

SURFACE FEATURES GALORE Titan has an active surface with dunes, lakes and even (potentially) cryovolcanoes. Shown clockwise from ...

32 AUSTRALIAN SKY & TELESCOPE April 2019 thatthewatershootingoutofthatmoon’ssouthpolespreads throughout the Saturn system, i ...

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34 AUSTRALIAN SKY & TELESCOPE April 2019 XATMOSPHERE IN PROFILEShown is a representative temperature profile for Titan’s atm ...

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DISTANT WORLDS 1 by Alan Stern Initial results from the Ultima Thule AFTER MORE THAN THREE YEARS of continuous preparations, it’ ...

than would be expected from a simple merger event. At this writing, only about 1% of all the data that New Horizons collected on ...

38 AUSTRALIAN SKY & TELESCOPE April 2019 Inexpensive amateur equipment is aiding astronomers on their quest to find Kuiper B ...

http://www.skyandtelescope.com.au 39 SIMAGING PLANNER Skyhound, a purveyor of planning software for amateurs, unveils SkyTools 4 ...

40 AUSTRALIAN SKY & TELESCOPE April 2019 HD 62679 38 42 25 26 MESSIER’S MARVEL by S. N. Johnson-Roehr POSS-II / STSCI / PALO ...