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.
Debunking Interstellar Travel: Separating Fact from Fiction
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I Calculating the Rotation Curves of Galactic Disks
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B Methods of accelerating in space?
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B Why the Milky Way shows band in all-sky energy scans
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I Moon's End: What's the Scenario?
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I Is the space elevator affected by lightening, sprites, emf?
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A Advanced Aliens Are In Happiness Boxes: Why SETI Must Fail
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I What Were Earth's Rotation Rate and Tilt Before and After the Theia Impact?
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A Would a larger Martian moon create a stronger magnetic field
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Stargazing How do we know how bright a cepheid variable star is?
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I Simulating Binary Systems with RK4 in C
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B How could we "reactivate" Mars' magnetic field?
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Stargazing What telescopes are good for seeing planets and galaxies?
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I Does spacetime have potential energy?
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A Take FFT to find time period for eclipsing binaries
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B Why do areas near the poles experience semidiurnal tides?
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I Where is the matter in a black hole?
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B Prediction: A Red Nova May Rival Polaris in 2022
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B Terraforming Venus: Why Nobody Discusses It?
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I Question about Relatavistic mass
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I Largest Hard Planet of Gravity 1g we have ever Discovered?
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B MARVELS Discovery: 1 Giant Planet & 'Failed Star' Found
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I Why is Mercury Visible at Night?
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B Do Stars Experience Precession Like Our Sun?
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A What if i do not go into orbit but close in on a langrange p
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I How to draw figures and diagrams?
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I Modeling a Binary Asteroid System Around the Sun
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I Can dark matter explain Tully-Fisher relation & new paper
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Stargazing Advanced Astrophotography - Comments
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Stargazing The James Webb Space Telescope construction
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B Is a lunar space elevator a realistic proposition?
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I Open access papers in JGR-Planets
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I How can Andromeda collide with the Milky Way?
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B Uranus May Have Two Dark Unseen Moons
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B The aliens are silent because they are dead
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B The news media on 2 trillion galaxies: Confused, or am I?
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I Why don't any stars "look" red? red shift
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Stargazing Intermediate Astrophotography - Comments
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How did Tycho Brahe measure time?
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I Solar System Origins: Angular Momentum Problem?
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Stargazing Seeing Uranus - Two Nights of Celestial Wonders
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A Finding an exoplanet via its magnetosphere's effect on starlight?
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Stargazing Introduction to Astrophotography - Comments
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B Found: The Least Luminous Galaxy Ever Seen
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B Gravitational wave signal duration
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Stargazing How can the telescopes take photos of distant galaxies?
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B Where is the Void? Universe Big Bang & Expansion
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A Types and Common Names of NGC/IC objects
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Stargazing How to build an optical telescope for research?
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B Black Holes and The End of Spacetime
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I What Causes Distinct Absorption Bands in the Sun's Spectrum During Sunset?
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B Space Finite? Inconceivable - Thoughts?
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B Unusual Exoplanet Discovery Using Star Pulsations: KIC 7917485b
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I Plotting the orbits of the planets
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I What computer science would you need for astrophysics?
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I Gravitational acceleration and the baryon distribution
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B Is Spacetime Actually a Superfluid?
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I Light fluctuations and finding exoplanets
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I Gravitating particles and entropy
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B Unsolved Mystery: Where Do These X-Rays Come From?
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B When to see aurora borealis in Lincoln, NE?
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B 'Strong signal' from sun-like star sparks alien speculation
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B Does water pressure decrease in zero gravity?
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I Lunar versus Solar orbit at solstices
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I Need help with some calculations with gravitational waves
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New Radial Velocity Experiment (RAVE) Data Release
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A How much energy to fly Spaceships from sci -fi movies
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B Astrophysics Science Fair Project Ideas?
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I What's the feasibility of space mining companies?
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A Photon densities within galtactic disc compared to CMB
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B Delta-v for orbit if already at ideal velocity and altitude?
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Stargazing H.E.S.S. gamma ray telescope got an image of the moon
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I Why are stars grouped in galaxies?
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B Unraveling the Mystery of Hydrogen Times Pi Frequency
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I How to Calculate Longitude and Latitude Speed from Cartesian Values?
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Stargazing Amateur Astrography: Stitching Together Large Fields of View
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I Planetary Orbits in AU - Stability & Mass Limits
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B Explaining the Color Variations of Main Sequence Stars
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Stargazing Can a Planet Have Multiple Moons with Unique Orbital Patterns?
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B Aerogel comet particle capture experiment?
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B What is the total size of the Asteroid Belt in kilometers?
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B Simulating orbit trajectory based on position and velocity
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I What is the average number of planets per star?
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Fact check: Planetary collisions
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I Spacetime and effects of being super close to the Sun
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Stargazing Processor power for entry level Astrophotography
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B Can Non-Rigid Spacesuits Provide Adequate Protection for Space Travel?
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B Capturing a distant planet's light
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Stargazing GAIA - 1 billion stars and counting
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How to determine a planet's size given gravity
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A Exploring the Pauli Exclusion Principle and Black Holes
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B Why is planet X always depicted as being blue?
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I How to derive full solar sprectrum from gamma rays
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B Van Allen Belt "mirror points"-- How do these work?
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I How can I find journals about this discovery?
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Can Gravitational Lensing Be Caused by Refraction?
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B Do we currently have interstellar com capabilities?
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I Is there a point during star formation when gas is 1 atm?
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B Very close asteroid pass in a few hours
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B How do stars orbit the center of the Milky Way?
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