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.
Undergrad What was the true significance of Roemer's measurement of the speed of light?
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Graduate Estimating the ratio of flux of sunlight to moonlight (at full moon)
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Graduate Velocity of rotation at the edge of the Galaxies
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Undergrad Absolute Magnitudes for Cepheids
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Graduate Where Did the Electrons Come From in Big Bang Nucleosynthesis?
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Graduate Is Empty Space Beyond the Universe Influencing Its Expansion?
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Graduate Radiative equilibrium in near-Earth space
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High School Comet Decay: Understanding the Forces Impacting It
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Graduate What Are the Latest Insights on Spiral Galaxy Formation Theories?
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Undergrad How does dark matter clump together?
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Mysterious Orange Light in the Sky
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Graduate Do Exotic Matter Stars Exist? New Study Offers Insights
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Undergrad Can Mars Effect the Asteroid Belt?
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Graduate Could gravity's strength also require denisty as an alternative to MOND
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High School The Universe's Scale: Galaxies, Stars, and Beyond
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Graduate What Was the Universe Before Big Bang?
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Graduate Moon slingshot powered atmosphere scoop?
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Graduate Redshift Anomaly: Progress & Confusion
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Graduate Paralell Universes - SA special report
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Graduate Could Sirius A/B Trigger a Supernova?
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Graduate Unusual object I saw in sky in Boston area
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High School Does blackhole have strong magnetic field?
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Graduate Something majorly wrong with this paper?
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High School What is at the center of the universe?
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Graduate What is the relationship between gravity and dark matter in the universe?
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Graduate Does Mass and Energy Affect the Path of Light Differently in General Relativity?
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Graduate Heard anything about GPB results?
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Graduate Help Visualisation and Stats for a Determinist
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Undergrad Velocity to Keep Object in Orbit Above Moon - Jeffrey
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More stars in the Milky Way or galaxies in the universe?
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High School Why the sun/moon looks bigger at the sunset/rise?
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Graduate What causes the squiggly orbit and how can it be eliminated?
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Find the Perfect Binocular for Stargazing: Expert Recommendations and Reviews
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Graduate How could a spaceship mimic gravity?
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High School Expanding into Astrophotography: Seeking Recommendations for a £300 Telescope
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Graduate Uncovering the Truth: A Physics Site Dedicated to Evidence-Based Discussions
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Graduate Understanding the Expansion of Space: A Scientific Perspective
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High School Quick (Most likely simple) Question
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Stargazing Heres my pic of m36 taken the other night
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Undergrad WHY is the sun red during rise and set
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High School Where Do We Look When We See the Milky Way from Earth?
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High School Bertrand Russell's Paradox: Certainty or Doubt?
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Graduate Expansion of the Universe and the Limitations of Hubble's Law
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Graduate Was Newton in Error? Philosophical Prejudice & MOND Theory
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Stargazing My Latest M-51: A Comparison with Previous Attempts
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Graduate Effect of Sun movement on Planetary orbits?
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High School How do astronomers calculate the distance to an object using trigonometry?
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Arizona Telescope: Did Big Scopes See Pluto Conjunction?
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Undergrad What Are the Key Differences Between Astronomy, Astrophysics, and Cosmology?
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Graduate What If the Moon and Earth Were Twin Planets?
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Graduate Is the trampoline analogy an accurate representation of space-time curvature?
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High School Anyone own a Celestron 11'' schmidt cassegrain?
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Undergrad Earth's rotational speed when its gravity is 5.0m/s2
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Undergrad Radiative Transfer: Learn Physics - Free Reference Guide
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Undergrad Acceleration, velocity, distance, speed and time help please
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High School End of the Universe: Light is the Final Frontier
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Graduate How Does Energy Influence Our Movement in the Expanding Universe?
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Graduate How Is Total Radial Velocity Determined in Binary Stars?
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Undergrad How Do You Begin Your Journey in Astronomy and Astrophysics?
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High School Can Aliens See Events from the Past?
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Graduate L1 L2 Points: Influence & Model Dependence
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Undergrad Is the Moon's Rotation a Coincidence?
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High School Questions out of curiosity… Enlighten me please
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Graduate What are the Detailed Steps and Mechanisms of Stellar Evolution?
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Graduate Lunar Laser Rangefinding: Testing GR's Gravitomagnetic Phenomenon?
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Undergrad Universal Gravitation and orbit
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Undergrad What Are the Key Insights and Fascinating Facts About Cepheid Variable Stars?
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Highlight something on MS word and press backspace
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Stargazing A rough calculation on the duration of lunar eclipse
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High School Could the Moon's Shape Explain Why We Only See One Side?
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  • Poll Poll
Stargazing Watching the Lunar Eclipse on March 3rd?
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Undergrad What is the vector equation for escape velocity?
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Access to astronomy journal articles
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Graduate Where Can I Find Data on Stellar Types and Their Locations in the Milky Way?
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Graduate Explain p-process in nucleosynthesis
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Graduate Charged particles from our Sun travelling too fast?
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Graduate Gamma Ray Bursters: Electrons, Anti-Electrons & Mass Exploding
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Graduate How Can Quantum Mechanics Illuminate Our Understanding of Astrophysics?
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Undergrad Doesn't dust or debris collect at the L4 and L5 Lagrangian points?
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Undergrad Astro simulation program problem - program bugs?
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High School How is a Comet Defined?
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Graduate Planetary formation and effects of gravity
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Undergrad What would happen if I were to near and be consumed by a black hole?
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High School Formation of the Moon: A Vibrating History
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High School No big planets close to the Sun?
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Undergrad Water on Mars: Separating Fact from Fiction - Textbook Deadline Approaching!
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Undergrad Black holes, the sun and wormholes.
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Undergrad Are craters on the moon randomly distributed?
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Undergrad Does Uranus Have a Distinct Rocky Core?
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Graduate Are Long GRBs caused by PopIII hypernovae?
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I'm Living in the Astronomy Section
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Undergrad Are other planets getting hotter like the Earth?
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Undergrad Quick easy questionFormula for angular diameter?
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Astonishing Photo of Russian Rocket Booster Explosion!
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Undergrad Where Can I Find the Mathematics in Nucleosynthesis?
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High School Is the Apophis Asteroid a Serious Threat and What is NASA Doing About It?
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Undergrad Astrophysics Starter Guide | Find the Best Textbooks
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Stargazing First is the Blue Snowball , a planetary nebula.
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Graduate Temperature Effects of a Doubled Radiation Emission from an HII Region
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I know, lets launch a car into space
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