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.
Graduate Black Hole Mass Flows: Is the Balance 0%?
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Undergrad What is the significance of hour angle in astronomical observations?
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Graduate Gravitational perturbations = tidal forces?
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Undergrad Are Black Holes Hot? A Deeper Look
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Undergrad Planet orbital location database
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Graduate Can Black Holes be Propelled by Ion Engines?
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Undergrad What happens when a second mars appears?
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High School Spectacular solar eruption 7 june 2011
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Graduate What is the efficiency of the Sun, really?
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Graduate Big Bang With No Center Fallacy?
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Graduate New Supernova Discovery Shines Bright
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Searching for list of measurements of moon-earth distance.
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Graduate DARK MATTER: it was always there
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Graduate Big surprise - Magnetic foam at edge of heliosheath.
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High School Does the temperature stay the same above a certain point?
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Graduate Black hole growth paradox question
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Stargazing Skywatcher Skyliner 150P Dobsonian questions
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Graduate How Does the Solar Wind's Protective Role Affect Astronomical Observations?
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Graduate Can a blackhole suck in another blackhole?
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Undergrad Could the acceleration of expansion (of the universe) be an optical illusion?
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Undergrad Planets - Effective Temperature vs Actual Temperature
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High School Is it possible to truly escape Earth's gravitational pull?
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Undergrad Can There Be a Stable Figure-Eight Orbit Between Earth and the Moon?
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Undergrad Asteroids and the formation of planets
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Real Quasar Image: Gamma Radiation Burst on Science Channel Program
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Undergrad How Does Time Dilation Affect Our Understanding of the Universe's Age?
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Graduate Orbital effect of a sudden change to G
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High School Where can I find equatorial coordinates of celestial objects?
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High School Position of Sun at noon between the Equator and Tropic of Cancer
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Graduate What Are the Best Resources for Researching Dark Energy?
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High School If earths rotation stoped, the moon would be released.
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Undergrad Perpetual Motion: Is Cosmos an Endless Machine?
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Graduate If gravitation is mediated via particle doesn't it mean thatthis
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Graduate Equation for the energy of Hawking Radiation
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Graduate Does the universe have an overall rotation?
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High School What happen to gravity in the center of earth
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Graduate Why do scientists believe white holes are impossible?
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Graduate Why Do Planets with the Same Orbital Period Have the Same Average Density?
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Undergrad How long could it take for the Earth to be in the exact same place as it was?
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Graduate Is Our Universe Based on Finite Geometry?
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Graduate 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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High School How Long Does Earth Rotate Around the Earth-Moon Barycentre?
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Undergrad Emission line in spectrum of a sun
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Graduate What happens when a ray of light hits the boundary of the universe?
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Graduate How do collisions affect the evolution of objects in the Oort cloud?
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Graduate Matter creation, dark energy, and the possibility of a Big Crunch
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High School Help a Physics Amateur - See Attachment!
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Graduate Early universe: equilibrium before nucleosynthesis
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Graduate How often do small asteroids reach the Earth's solid surface?
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Graduate Can a star with a black hole core be stable?
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Graduate What is the total mass of the heliosphere approximately? And its
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Graduate How Do CMBR Variations Differ Across Planets?
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Undergrad Why does gravity make things spin?
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Undergrad How to Calculate Angular Diameter of a Galaxy with a Given Diameter?
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Graduate Calculating the density of a HII region
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Undergrad 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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Graduate Will the speed of light change in the Universe's distant future?
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Undergrad Star density, outside our galaxy
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Graduate Is Dark Energy Tearing Us Apart Atom by Atom?
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Graduate When will we be able to image the Oort cloud?
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Graduate 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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Graduate N-Body simulation: MERCURY vs. Swift
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Graduate What are the properties of electron gas in the Sun?
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High School Unraveling the Mystery of the Moon's Non-Spinning Rotation
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Undergrad Distribution of planets material
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Undergrad Milky Way: Star & H-Atom Distribution
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Undergrad Atmospheric Surface Pressure and Density
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Undergrad Asteroid Density & Impact Rate - Earth vs Mars
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Undergrad What is the binding energy needed to shatter Earth by asteroid impact?
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Undergrad Simulation of formation of a solar system
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Graduate Deriving the Relation for Escape Velocity from a Proto-Star Cloud
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Undergrad Determining the mass of globular cluster?
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Graduate Entropy and the big bang on to the big crunch and back
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High School Lifetime of Earth: Planet vs Sun
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Graduate How this equality exist between time and distance and the velocity
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Undergrad Universe Today: What Does It Look Like?
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Explore the Interactive Panoramic of Space
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Graduate What Insights Can Gamma Photon Distribution in the Galaxy Provide?
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Graduate Center of Mass of Universe: Is it Nowhere, Everywhere?
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High School Particle Motion 2: Floating, Flying & Moving Freely in Space
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High School French claim first habitable planet found
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Graduate H-alpha line in galaxies/ hubble redshift
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Undergrad How Does Gravity Cause Acceleration Towards a Massive Object in Space?
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Graduate What Could Have Possibly Triggered the Big Bang?
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Undergrad Relationship between mass and surface temperature of a star
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Graduate Why Do Some Stars Grow So Massive?
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Undergrad How Powerful Is a Supernova in Megatons?
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High School When did humanity realize that the Sun is just another star?
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Graduate Are there undiscovered sister stars in our solar system?
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Graduate Have i made it right to determine this amounts regarding this question
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Undergrad Estimating the radius of planets
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Undergrad The Mystery of Jupiter's Gravity: How Can it Eject Asteroids?
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Graduate Is Dark Energy Propelling the Accelerating Expansion of the Universe?
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Undergrad Planets with No Orbit: Fascinating News
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Undergrad Server to query for sun/planets elevation at a given datetime?
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