In order to fuse two hydrogen atoms two things are required: high temperature and high pressure. The minimum temperature…
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
Date and Constellation Location for Vernal Equinox in 3000 BCE
Fortunately, the JPL Horizons ephemerides calculator can provide the date and time of the vernal equinox for dates in…
Altitude Correction for Time of Sunrise and Sunset
I believe that the formulation provided in the section on “hour angle” in the wikipedia article describing the sunrise…
Will Titan’s Migration Away From Saturn Result in its Release from Saturn’s Gravitational Pull?
Indeed a recent study found that Saturn’s moon Titan is moving away from Saturn at a much faster rate…
Solstices and the Path of the Sun Through the Sky
The Sun reverses the apparent shift of its path through the sky at the winter and summer solstices each…
Does the Sun’s Magnetic Field Affect the Earth’s Rotation?
No. The only influence that the Sun’s magnetic field has on the Earth is through the energy released by…