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Primordial Black Holes Can Only Explain a Fraction of Dark Matter

Primordial black holes formed in the very early Universe without progenitor stars. They could make up a tiny fraction of dark matter.

Comunidad autonoma de catalunaVirgo kargaJ mack stscFritz zwickyJ madrid australian telescope national facilityBarcelona institute of scienceInstitute of high energy physicsStandard modelComa clusterHubble space telescopeAustralian telescope national facilityHigh energy physicsBarcelona instituteLaser interferometer spaceAstrophysical black holeIdentify dark

The Coma Berenices galaxy cluster, best in April and May

The Coma Berenices galaxy cluster, best in April and May
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United statesFritz zwickyWikimedia commonsChris leeLeslie colemanHubble heritage teamView at earthsky community photos paolo palmaComa berenices galaxy clusterHubble space telescopeComa berenicesAustralian telescope national facilityMilky wayFrosty drew observatoryFrosty drewEarthsky community photosPaolo palma

Bad Astronomy | Protocluster has too many dead galaxies in it

Protocluster has too many dead galaxies in it, could reveal what's killing extremely distant galaxies

J mack stscRogelio bernal andreoRogelio bernal andreophotoJ madrid australian telescope national facility photoJ madrid australian telescope national facilityMilky wayAustralian telescope national facilityVirgo clusterPlait bad astronomy

NSW government to establish local Space Research Network

NSW government to establish local Space Research Network
defenceconnect.com.au - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from defenceconnect.com.au Daily Mail and Mail on Sunday newspapers.

New south walesRobert fitchNastasha tupasStuart ayresStefan williamsNational space industry hubTech lab in botanyUniversity of technology sydneyAbyss solutionsUniversity of sydneyAustralian telescope national facilitySpace research networkMoon to mars demonstrator feasibility initiativeSpace industry development strategyIndustry transformation centreResearch network

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