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EarthSky | See Mira the Wonderful at its brightest

EarthSky | See Mira the Wonderful at its brightest
earthsky.org - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from earthsky.org Daily Mail and Mail on Sunday newspapers.

David fabriciusWikimedia commonsAstrophotographer alan dyerIsmael bouillaudJohannes holwardaJohannes heveliusAlan dyer amazingskyAmerican association of variable star observersCheck stellariumOmicron cetiAmerican associationVariable star observersLight curve generatorNorth starCurve generatorV shaped hyades

The Sky This Week from July 30 to August 6

The Sky This Week from July 30 to August 6
astronomy.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from astronomy.com Daily Mail and Mail on Sunday newspapers.

Delta ophiuchiJ depasquale stscKaus australisDelta aquariidsAlison klesmanAl okab australisDelta aquariidAmerican association of variable star observersHubble space telescopeQuarter moon julyLast quarter moonQuarter moonSea goatAmerican associationVariable star observersDeneb al okab australis

Astronomers find more clues behind Great Dimming of giant star

Astronomers find more clues behind Great Dimming of giant star
cbc.ca - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from cbc.ca Daily Mail and Mail on Sunday newspapers.

Region flamandeUnited statesStella kafkaEmily levesqueMiguel montargesUniversity of washingtonAmerican association of variable star observersBetween novemberLarge telescopeObservatoire de parisEuropean southern observatoryVery large telescopeAmerican associationVariable star observersGreat dimmingEmly cannon

EarthSky | What is a variable star?

A variable star is one that brightens and ims in cycles that may range in length from hours to months. How does it happen?

Al qahirahHenrietta swan leavittDelta cepheiW ursae majorisDavid hardyDelta cepheidsHenrietta leavittAustralian telescope national facilityDurham universityAustralia telescope national facilityAmerican association of variable star observersMilky wayTrifid nebulaWikimedia commonsAustralia telescope nationalAmerican association

Frank Kameny: Google doodle honours astronomer and gay rights activist

When he was unjustly fired from his job as an astronomer in 1957, Frank Kameny took up a lifelong struggle for the civil rights of gay people

New yorkUnited statesLafayette parkSam wongBarack obamaSarahl voisinFrank kamenyAmerican psychiatric associationUs army map serviceAmerican association of variable star observersQueen collegeHarvard universityCivil service commissionWashington postOffice of personnel managementUs army in europe