Black holes are formed by the gravitational collapse of a massive object. The mass of the resultant black hole…
Select :
asteroid collisionasteroidsastronomical distance scalesatomsbig bangblack holesbright lights in the skybrown dwarfcareerscelestial eventschecker cabscometsconstellationscosmic distancescosmic microwave backgroundcosmic rayscosmologydark energydark matterdwarf planeteartheclipseeclipticeducationexoplanetsexpansion of the universegalaxiesgeneral relativitygravitational lensgravity wavesGreat Red SpotHoaxesHubble Space Telescope (HST)Interferometerinterferometryinterstellar moleculesionosphereJupitermagnetarsmarsmeteorsMH370milky wayMilky Way Galaxymoleculesmoonmoonsneutron starneutron starsNibirunight skyparallaxphysicsplanetsplutoproperties of lightPtolemypulsarsquasarsradar astronomyRadio Astronomyradio frequency interferenceradio interferometersradio recombination line emissionRadio TelescopeSatellite DishSchwarzschild Radiusscientific methodsearch for extraterrestrial intelligenceSETIsolar systemspace probesspacecraftstar formationstarssunsupernovasupernova remnantssupernovaetelescopestime dilationTrans Neptunian Objectstwin paradoxunexplained celestial observationsVenusVery Large ArrayVery Long Baseline Array (VLBA)Voyager 1weather


Why Can’t We See More Black Holes in our Galaxy?
Assuming that all black holes are evenly distributed about our Galaxy, we can calculate the volume of our Galaxy…

Why Don’t All Objects in the Milky Way Rotate Around the Black Hole at the Center of our Galaxy?
The gravitational force has a distance dependence to it that makes it decrease as you get further away from…

Why Do Black Holes Lose Mass When They Emit Hawking Radiation?
The visualization that describes Hawking Radiation as the creation of particle/antiparticle pairs near the event horizon of a black…

What Process Was Used to Image the Black Hole in M87?
The Jet Propulsion Laborabory (JPL) has provided a very nice and detailed description of the techniques used to image…

Why did the EHT Choose to Image the Black Hole in M87 Rather Than Cygnus X1?
This is a very good question. Both M87 and Cygnus X1 would have been observable by the telescopes which…