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.
Planets - Effective Temperature vs Actual Temperature
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Is it possible to truly escape Earth's gravitational pull?
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Can There Be a Stable Figure-Eight Orbit Between Earth and the Moon?
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Asteroids and the formation of planets
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Real Quasar Image: Gamma Radiation Burst on Science Channel Program
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How Does Time Dilation Affect Our Understanding of the Universe's Age?
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Orbital effect of a sudden change to G
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Where can I find equatorial coordinates of celestial objects?
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Position of Sun at noon between the Equator and Tropic of Cancer
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What Are the Best Resources for Researching Dark Energy?
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If earths rotation stoped, the moon would be released.
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Perpetual Motion: Is Cosmos an Endless Machine?
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If gravitation is mediated via particle doesn't it mean thatthis
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Equation for the energy of Hawking Radiation
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Does the universe have an overall rotation?
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What happen to gravity in the center of earth
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Why do scientists believe white holes are impossible?
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How long could it take for the Earth to be in the exact same place as it was?
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Is Our Universe Based on Finite Geometry?
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Magnetism and Ampere-Maxwell's law
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What is Dark Matter? | Just Curious
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Does peace occur before real space travel ?
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Stargazing What is the advantage of a binocular telescope (such as the LBT)?
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How Long Does Earth Rotate Around the Earth-Moon Barycentre?
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Emission line in spectrum of a sun
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What happens when a ray of light hits the boundary of the universe?
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How do collisions affect the evolution of objects in the Oort cloud?
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Matter creation, dark energy, and the possibility of a Big Crunch
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Help a Physics Amateur - See Attachment!
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Early universe: equilibrium before nucleosynthesis
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How often do small asteroids reach the Earth's solid surface?
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Can a star with a black hole core be stable?
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What is the total mass of the heliosphere approximately? And its
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How Do CMBR Variations Differ Across Planets?
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Why does gravity make things spin?
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How to Calculate Angular Diameter of a Galaxy with a Given Diameter?
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Calculating the density of a HII region
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What Data is Needed to Understand the Formation of Black Hole Jets?
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Mars Age Two to Four Million Years?
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Will the speed of light change in the Universe's distant future?
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Star density, outside our galaxy
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Is Dark Energy Tearing Us Apart Atom by Atom?
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When will we be able to image the Oort cloud?
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Is GRB090429b at the Edge of the Observable Universe?
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Stargazing Most powerful telescope system of the future?
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N-Body simulation: MERCURY vs. Swift
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What are the properties of electron gas in the Sun?
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Unraveling the Mystery of the Moon's Non-Spinning Rotation
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Distribution of planets material
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Milky Way: Star & H-Atom Distribution
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Atmospheric Surface Pressure and Density
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Asteroid Density & Impact Rate - Earth vs Mars
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What is the binding energy needed to shatter Earth by asteroid impact?
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Simulation of formation of a solar system
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Deriving the Relation for Escape Velocity from a Proto-Star Cloud
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Determining the mass of globular cluster?
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Entropy and the big bang on to the big crunch and back
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Lifetime of Earth: Planet vs Sun
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How this equality exist between time and distance and the velocity
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Universe Today: What Does It Look Like?
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Explore the Interactive Panoramic of Space
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What Insights Can Gamma Photon Distribution in the Galaxy Provide?
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Center of Mass of Universe: Is it Nowhere, Everywhere?
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Particle Motion 2: Floating, Flying & Moving Freely in Space
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French claim first habitable planet found
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How Does Gravity Cause Acceleration Towards a Massive Object in Space?
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What Could Have Possibly Triggered the Big Bang?
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Relationship between mass and surface temperature of a star
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Why Do Some Stars Grow So Massive?
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How Powerful Is a Supernova in Megatons?
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When did humanity realize that the Sun is just another star?
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Are there undiscovered sister stars in our solar system?
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Have i made it right to determine this amounts regarding this question
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Estimating the radius of planets
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Is Dark Energy Propelling the Accelerating Expansion of the Universe?
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Planets with No Orbit: Fascinating News
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Server to query for sun/planets elevation at a given datetime?
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Find Direction Between 2 Points: A & B
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How Does Time Connect to Space in Our Universe?
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What is the Best Book for Learning About Astronomy?
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Could Rogue Planets be an Alternative to Dark Matter?
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How Does Gravitational Time Dilation Work?
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Outer planets always gas planets?
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What happens to time inside a black hole?
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Mysterious Red Shape on Google Earth
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What is an equal-sun-elevation day called?
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Einstein's Gravity: Challenging the Traditional Concept of Forces
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Wormhole Physics: Can a Single Wormhole Have Multiple Mouths?
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What is next for the US space program?
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What is the difference between the left and right pictures of a Quasar Core?
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Has a Star Collision Ever Been Observed in Our Universe?
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Are Black Holes sufficiently characterized?
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How do I develop physical intuition for the tidal force?
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Big Crunch. What happens at the moment the universe changes direction?
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Asteroid Impact Crater Size: Function of Diameter
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How Did Ancient Civilizations Accurately Predict Astronomical Events?
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How Can Quasar Beams Emerge from Black Holes Despite the Event Horizon?
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Measuring time in the 17th century.
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What's the opposite of a blackhole?
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Dark matter exerting a gravitational effect on earth?
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