Astronomy and Astrophysics Forum

Join in expert discussion on the topics of Astronomy and astrophysics. This may include discussion on celestial objects, space, and the physical universe as a whole. Mainstream science only.
B Nebula Experiment Help
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B Why does the Andromeda galaxy appear so tiny from our perspective?
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81
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B Anyone here in the CA blackout area that has enjoyed dark skies?
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B Nobel Prize for first exoplanet discovery
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357
B Atoms and Black holes
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357
B Angular Meteorite Strikes on the Moons Surface
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258
B What Happens to a Dead Galaxy's Mass?
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B Atoms within the sun
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B Is there more to the Red Shift than we think?
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B Superclusters and their galaxies
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B Why Jupiter, Saturn and the Sun have a distinctive and sharp boundary?
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B Water found on potentially habitable exoplanet
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B How does the LIGO experiment affect SpaceTime?
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B A wormhole collides with a black hole -- what would happen?
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534
B SOFIA IR Observatory in the Southern Sky.
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B Do we have another interstellar visitor?
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B Can we see our past?
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B What would it be like on Earth if it were not a sphere?
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B Radiation shielding and redirecting
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B How can Jupiter maintain its spherical shape without being contained in a spherical shaped container?
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B Intensity of Spherical Shell of Stars
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B What are the maximum masses of White Dwarves and of Neutron stars?
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B How to calculate a star's luminosity/radius
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B Resources to help understand black holes
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B New 3D Map of the Milky Way
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B What do they mean when they say something is so many light years away
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B What would happen if the core of the sun were removed?
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B Cloud cities on Venus
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B Thirty Meter Telescope can resume construction
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B What is going on at LIGO/VIRGO?
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B Where has all the methane gone?
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B What is responsible for the spinning of a galaxy?
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B Why do pictures of stars have 4 cardinal points?
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B Do Black Holes Precess?
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B What process allows us to 'see' lightyears of distance with the natural eye?
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B What’s more “important": GR or QM?
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B Dwarf Planet or Stellar Moon?
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B How well should Astronomers know General Relativity?
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465
B Milky Way is "in the top percentile of all the galaxies that exist"
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B The Hubble deep field photos and the edge of the universe
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B Black holes and the first law of thermodynamics
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B Galaxy Database with distances from Earth
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12
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B Is the asteroid belt horizontal or like a dome?
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7
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B Destroying asteroids shown to be very difficult
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B Radio source Hercules A and galaxy 3C 348
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B New theory, our solar system formation, "space bubble"
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B What is empirically known about the shape and size of the Universe?
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B Juno -- Coolest space ship in the solar system?
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B A little logical doubt on Hawking radiation
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B Wow. Great picture of exoplanet HR8799e - 129Ly distant!
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B Black hole gravitational pull
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B What are these bright spots in this zoomable image of the Milky Way?
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B How to find inverse steradian from arcmin^-2 for density of galaxy
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358
B How prevalent is the R language in astronomy research?
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B A different take on the M87 black hole
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B Any new news from Parker?
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B How common for almost same solar eclipse 17 months later?
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B First ever look at black hole?
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B Gravitational Wave Interference Graphical Computer Simulation
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B Temperature regulation in Earth orbit
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B Orbits of galaxies in the Coma Cluster
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B Why can't we see dark matter in the solar system?
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B Absorption of electromagnetic radiation
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B Visual simulation of gravitational lensing
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B Magnification scale of order
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B Asteroid/Near Earth object mining
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B Is there a standard mapping of celestial coordinates to geo-coordinates
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B Question about Preventing Tidal Locking around Red Dwarf Stars
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B Convection in stars
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B Black hole ringdown
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B Red Dwarf Stars - Planet Habitability around "Flare Stars"
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B Does being tidally locked affect a planet's magnetic field?
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B Did anyone actually see the space moving faster than light?
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B Temperature of gaseous nebulas
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B Black holes and infinity
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B Could singularities be just rips in the space-time fabric?
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B Previous thoughts on destroying asteroids were wrong: Nuking them is a bad idea
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B Observing black holes
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B If Quark stars exist why do Neutron stars become Black holes?
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B For Lack of a Better Term...Moon Motion
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B 18 new galaxies found at z=8
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B Questions regarding energy in the universe
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B Photon decoupling
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B About the current Rover mission
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B How hard is it to track moon cycles
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B The unusual motion of stars in galaxies
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B Galaxy rotational curves vs time
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B The age of the Milky Way galaxy
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B Is Dark Energy really the best term?
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B Basic questions about astronomy
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B Exoplanets - Suspicious evidence and fantastical conclusions
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B Why didn't the Moon go fully red for this eclipse?
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B Expansion of the universe
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B A second galaxy with no dark matter
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B Hyperloop - Orbital Space Launch
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B Earth from space
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B Oumuamua remains a puzzle
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B The Hubble WFC3 instrument has stopped working
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B Solidification of white dwarves
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1
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B Further collapse of Neutron Stars
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4
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809
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Astronomy

Astronomy generally refers to the act of observing things (be that stars, galaxies or whatever) which, coupled with astrophysics, aims to understand those things for their own sake. The aim is to learn about the stars, galaxies or planets etc.

Astronomy, both observational and theoretical (and now also experimental!) is about what is going on in the universe that we can see now, or extrapolate to short times (~a billion years) in the past or future.

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