Astronomy and Astrophysics Forum

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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.
I Gravitic Field of Rotating Disk-Shaped Mass Along Ecliptic
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Stargazing How Can a Grain of Sand Create a Bright Meteor?
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B Significance of a planet's "surface gravity"
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B Move vehicle in space by rail structure systema
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B Confused about traveling at the speed of light
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B Is the Earth in its original orbit?
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Stargazing Nebulosity is a hard program for the aged?
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B B Calculating the age of the universe with the Hubble constant
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I Galaxy Merger and Damped Oscillation?
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B What is your favorite planet of the solar system?
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I Is angular momentum conserved in a Supernova?
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I Can 21 cm Emission Be Detected in a Laboratory?
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B Does dark matter make black holes bigger?
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B Are OH molecules in masers ionized?
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I Is Stellarium More Accurate Than VSOP87?
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B Are asteroids found by the light they reflect?
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Why do things fall into a black hole?
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I Why do planets follow the same curvature at both foci?
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B Determining the transition frequency
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How do mass and temperature change in black holes due to Hawking Radiation?
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I Bullet clusters & CMB accoustic peaks dark matter
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B Answers to Beginner Questions about Black Hole Event Horizons
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A Understanding MASERs and their properties
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I Does Free Space Permeability Change with Applied Magnetic Fields?
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B Temperature in the space between planets of our solar system?
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B Spiral Galaxies: Why Do Arms Bifurcate & What's Moving In/Out?
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B Discussing Juno/JunoCam Mission and Jupiter Data
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B Dark matter interacts with visible matter via gravity
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B Is a Black Hole Really Just a Spherical Structure?
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I Where does a polytropic EoS come from?
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I Black Holes: What They Are & What They're Made Of
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I Black Hole Time Dilation: What Would an Astronaut See?
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I Planet Composition: Detecting Exoplanets via Spectroscopy
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B Living on Titan: A New World for Humans?
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B Action and reaction of a rocket in space.
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B Is the effect of gravity limited by distance?
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I Terraforming Mars: Possibility or Pipe Dream?
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Stargazing How Can Both Jets from a Black Hole Appear to Move Faster Than Light?
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B Are all galaxies moving away from the Milky Way?
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B Thickness & Distance of Milky Way at Sun's Location
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B Are black holes white or monochromatic?
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B Height measurement on other planets
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A Density of White Dwarfs: Questions & Answers
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Stargazing Researching AN Ursae Majoris B for Supernova Possibilities
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B Luminosity and neutrino questions
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Stargazing What Is This Strange Light in the Night Sky?
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B Re-evaluating Dark Matter and Kepler's Law in Spiral Galaxies
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B Retrograde star orbits in the Milky Way
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Stargazing Where Is the Hubble Telescope in Orbit?
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I Nebulosity around Pleiades stars
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B Quantisation of light and Doppler effect
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B Will Voyager 2 Pass Sirius While Orbiting the Milky Way?
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I If there is life on Mars should people stay home?
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Stargazing Another supermoon to observe/photo
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B Weird quantum property of empty space?
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I Is Dark Matter the Key to Understanding the Cosmos?
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B The Semi-Major Axis of Binary Stars
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I Percent of stars in our galaxy that belong to clusters?
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Can we use technology to view the past through stars?
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B Neutron Stars and Angular Momentum
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I Why are craters on the Moon nearly all circular?
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I How do I compare a model to logarithmic data?
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B Trying to study the major constellations
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B Mass of Sun/stars (elemental/molecular vs. plasma)
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B So I don't understand moon eclipses
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I Scale of a in MOND and cosmological constant
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Stargazing Can Pluto be seen with amateur telescopes?
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B Creating Universe from "Nothing": Astrophysicists Debate
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I Chemical Life Possible in Brown Drafw Atmospheres?
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I Does time dilation prevent event horizon formation?
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B What is the Hoyle State of Carbon and How Does it Contribute to Star Fusion?
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I Converting galactical coordinates to horizontal/geographical coordinates
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B Progress direction of the Aldebaran occultation by the moon
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Space Travel: Overcoming Cosmic Radiation Challenges
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B How do we study space-time singularities?
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B Mars' Global Sandstorm: Causes and Effects
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Where Can I See the Milky Way Near Washington DC?
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B Huge amounts of water ice found on Mars
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I Euclidean differential number counts of supernovae
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B How to measure the amount of gravitational lensing?
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System simplification through state space
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I Objective classification of spiral galaxies
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B If energy is created with expansion and it has no limit....?
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I Are Red Dwarfs Home to Earth-Sized Water Worlds?
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Stargazing North American nebula from this past summer
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B If an object runs an infinite distance in universe....?
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I RA and declination of Sun & phase of Moon program
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Stargazing Supermoon Monday: Closest Approach in 70 Years
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Stargazing Dust on the Mirror: Is Cleaning Worth the Risk?
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Stargazing Is Your Camera's Sensor CCD or CMOS?
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B Flatlanders in the 3rd dimension "Hyperspace"
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B When are we "trailing" the Sun in its galactic revolution?
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I Dark Energy: How Can ~73% Of Universe Exist?
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Why is the ISS at a 51.6 degree orbital inclination?
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I China launches X-ray Pulsar NAVigation satellite
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I Is Constant Mass Density in the Universe Linked to the Casimir Effect?
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I Are all planets in our Solar System in the same plane?
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I Revolutionize Space Travel with Innovative Vacuum Launch Method
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A Velocity Dispersion: Meaning & Difference Explained
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Rosetta's comet mission discussion thread
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