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.
Galactic Black Holes: % & Types Explored
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The case for [or against] dark matter
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How the satellite parts get damaged
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Lunar and Solar eclipse - same times a year?
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Kepler's Second Law - reaching an unsolvable equation?
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B Viscosity of Space: Theory & Evidence
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The sun at midnight from North Pole
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Understanding the Effects of Black Hole Collisions
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Help with Venus Transit AU calculations
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Peanut-shaped near-Earth asteroid imaged by radar
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How is the ISS Captured Using a Telephoto Lens?
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New rocky exoplanet discovered is the closest to Earth
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How did planets get their Orbits?
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B What is the center of the universe?
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Infrared Yoga: Is It Possible for Aliens to Learn?
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Astrophysics uses wave optics or geometrical optics?
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Is Terraforming Uranus And Neptune Possible?
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Which dimension does the black hole belongs?
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How Fast Is the Moon Moving Away from Earth?
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Can Black Holes Truly Absorb All Matter and Energy?
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Earth's Orbit & Fleming's Left Hand Rule
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Term for space in front of the expanding universe.
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Measuring the entropy of the universe?
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Earth-Like Planet orbits Sun-Like Star
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Is there a theoretical min. size/mass limit to a black hole?
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Is the Fermi Gamma Ray Detector Capable of Detecting Individual Photons?
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Guidelines for including "atmosphere" in a body's "diameter"
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What does it mean to have a Black Hole Spike?
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Are Saturn's Rings Caused by Fractal Structures?
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Photons and Space-Time Expansion
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Intersecting Orbits of Binary Stars: A Visual Guide
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B Is it possible to keep a rip in space open? All info welcome
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Do quasars and blazars exist today?
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Witness the Majesty of the Ring Nebula: 100% Crop & (Nearly) Full Frame
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How can we see galaxies behind other galaxies?
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Calculating mass of Milky way Galaxy
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How far can transmissions go in space?
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Is Pluto Really Bigger Than Eris? New Horizons Settles the Debate.
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Stargazing Is there a proper way to clean a telescope mirror?
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So is this scary? (Black Hole in binary system)
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Planetoid formation, spherical or not.
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Are Helios Quantum 5 binoculars worth the investment?
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I have always wondered if Photons are magnetic and if so are
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Evolution of Life-Supporting Elements
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Q: Measured changes in the CMB radiation?
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High resolution observations of dark matter?
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Why does the Earth have a tilt but the moon doesn't?
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Could We Hear the Sun If Sound Waves Travelled Through Space?
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Black holes swallow space and time?
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Effect of high intensity electric and magnetic fields on gravity
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Question about the astro imaging program ds9
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Origin of Galaxies and Super Massive Black Holes
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Why does gravity collapse and stars explode?
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Collapsars vrs. QM degeneracy pressure
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Earth moon motions, distance etc.
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Is a Black Hole's Entropy Truly Lost?
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Help in Understanding Black Holes
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From RTN reference frame to ECI and orbital elements
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Solar System barycenter - Orbit of planets
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Nice lunar and planetary conjunction
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Milky Way Composite: Vacation Night Photo
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Do neutron stars, pulsars, magnetars etc. have weather?
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How Can we Find the Escape velocity of a black hole
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I don't understand what is the meaning of phase? (phase space, phase point, etc)
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Large, Persistent Eclipse/Shadow On Earth?
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What Are the Physical Components of Space?
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Avoid Killer Asteroids: Simple Solution Discovered
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What materials can a star produce before dying?
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Question about interstellar travel
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Geo Coronal Absorption Frequency
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Ceres Craters: Investigating NASA's Dawn Animation
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How to know there is a frequency shift?
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Intensity of light along the iridium flare
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Cosmological Expansion: Is There a Limit?
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Distance of GJ 436b to GJ 436 - doesn't work out.
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800+ ultra-diffuse galaxies in Coma cluster
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What Causes Radio Blackouts During Space Capsule Descent?
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Graviton vs Einstein's Curvature of Spacetime
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After supernova explosion sound is created....
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Like spacetime -- can sound be taken as a fifth dimension?
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Has the Value of G Constant Changed Recently?
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Higgs Bosson, manipulate gravity, 4 dimensional space.
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Determining The Size and Age of Our Universe
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Variations between Sunrise & Sunset timings
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What Does the Observable Universe Look Like?
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Living in a Rotating Space Habitat: Perception and Challenges
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Speed of light inside a black hole
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Argument of the Perihelion Projection
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What absorbs Ultraviolet radiation?
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Stargazing Create homemade reflector telescope by own
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Where is my calculation of sun angle incorrect?
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Possible observation of Pop III stars....? -NY Times article
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Effect of Rotation on the Earth and Planetary Disk(s)
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How Do Planetary Distances Influence Retrograde Motion Durations?
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The Mystery of Gravity: Doubts Answered
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Difference between conductors and empty space
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Are Multiverses and Intelligent Life More Than Just Beliefs?
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What would it be like to be at a Lagrange Point?
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What is the role of dark energy in the expansion of the universe?
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How Can I Measure Stellar Aberration Accurately?
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