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 How Does Torque Affect the Dynamics of an Accretion Disc?
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Graduate What is the relation between a black hole's mass and its kinetic energy?
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Undergrad How is the Barycenter Determined in a Two-Body System?
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Undergrad What are the strange absorption peaks on this solar spectrum?
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Graduate Critical density and total observable mass
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Graduate Observing someone falling into a Black Hole.
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Graduate Can Intergalactic Gas Feel Hot Despite Its Low Density?
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What are the differences between Astrophysics and Astronomy?
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Undergrad Calculating distance using redshift
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Graduate Calculation of the Distance to the Moons Apogee/Perigee ?
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Graduate How to calculate the size and orientation of a tidal bulge
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Graduate Application of Condensation Sequence to extrasolar systems?
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High School How do scientists monitor the Sun's activity?
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Graduate Estimation of central temperature of a star
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Asking for your sources of images of the whole earth.
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Undergrad Black Holes, how much energy do they give off?
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Undergrad The proton flux in Solar System in keV range
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Undergrad How do we calculate the magnitude of a system with binary stars?
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Graduate Rainbows in Space: Astronaut Sightings?
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Graduate Visualizing 4D Objects: Is it Possible?
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Graduate Galaxy expansion & cosmological constant
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High School Sunrise Direction in the South Pole
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Undergrad Launching Spacecraft from the Moon: Is it Worth It?
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Undergrad Orienting Space: 3D Travel from Earth, Center of Universe
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Graduate Can a Black Hole Collide with a Newly Formed Supernova Black Hole?
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Undergrad Hydrogen and Helium-4 in thermodynamic equilibrium
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Graduate Does Hubble's Expansion voilate conservation of energy by redshifting EM waves?
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Stargazing Reflecting Telescope or Refracting Telescope?
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Undergrad Question on delta-v and escape velocity?
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Graduate What caused galaxies to start spinning?
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Graduate How to design a weird but comfortable planet
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Graduate Understanding Orbital Mechanics & Elliptical Paths
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High School How big will the sun get when the seas begin to boil?
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Undergrad Understanding Arrays and Their Role in Converting Light into Data
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Undergrad Why do neutrinos escape the sun's core faster than photons?
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Graduate Galaxy size particle accelerator
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Graduate Can Radar Be Used to Map Distant Planets?
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High School Comet Death Dive Into Sun Seen in Detail for 1st Time
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Graduate Hydrostatic Equilibrium in an Accretion Disc
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Undergrad Venus: Slowing Rotation Detected by Venera, Magellan, and Venus Express
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Undergrad How Do You Convert Proton Flux from 1/(cm^2 s sr) to 1/(cm^2 s)?
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Undergrad Cepheid Variables in Distant Galaxies
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Graduate Is the Light Cone a Valid Representation of Light's Behavior?
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Graduate What is the role of elasticity in space-time according to Sakharov's theory?
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High School Is Outer Space Truly Infinite? The Never-Ending Question of Exploration
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Graduate Units problem in Keplerian equation
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Undergrad Angular Velocity and Spin/Orbital Angular Momentum of Jupiter
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High School Stationary Satellites: Can We Orbit at the Poles?
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Undergrad How many kinds of force exist between Planets?
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Undergrad Absolute Magnitude Calculation, How?
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Graduate Measurement of c using Bradley and 1905 SRT aberration models
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Graduate Gauss's Law and Magnetic Reconnection
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Graduate Phase-space structures in plasma turbulence
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Graduate Can a Neutron Star Fragment Become a Meteor and Survive on Earth?
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Graduate Can a Gravity Lens Loop Amplify Distant Objects in Space?
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Graduate Why the universe appears to have one time and three space dimensions
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Undergrad How Do You Measure Gas Leaks in Space?
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Real pictures of black hole eating a star?
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Graduate The Quark Epoch and the Existence of Space and Mass
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Graduate Does Dark Flow Challenge the Big Bang Theory?
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Is the Flash Scale of the Universe Animation Still Relevant?
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Graduate Dark Energy: Questions on Uniform Energy Density
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Graduate How Can Two Planets Observe Different Redshifts from the Same Star?
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Graduate Frame-Dragging, Density and Space-time Distortion
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Undergrad When a star loses its mass, do the orbital radii of the planets increase?
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Graduate Does Galactic Rotation Cause Frame Dragging?
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Undergrad Acceleration of spaceships with different masses?
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Undergrad What is the Semi Major Axis of a Binary Star System?
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Undergrad Precession-Jumping from 1875 to 1950
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Undergrad How do Occupants of the ISS Survive a CME
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Undergrad Gyroscopic effect on planetary motion
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Graduate Is Faster Than Light Travel Possible Through Controlled Space Expansion?
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Undergrad How massive/hot does a star have to be for fusion to occur
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Undergrad Motions of stars inside elliptical galaxies?
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Graduate Might NGC 1073 have a non-coplanar bar and spiral arms?
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Undergrad Search patterns in observational studies
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High School Which Has a Greater Gravitational Pull on Earth: Sun or Moon?
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Graduate Space, matter and physical models
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Undergrad Video Games and Their Basis in Theory
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High School Why don't shooting stars make a noise?
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Undergrad The Sun with a planet with a moon with a satellite
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High School What is a Geomagnetic Storm and How Does it Affect Earth?
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Graduate Which theory accurately explains the effect of gravity on light?
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Graduate Detecting hydrogen inside IMC's and GMC's
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Graduate Are Void Centers Ultra-Massive Primordial Black Holes?
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Graduate What is the nature of space and time?
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Stargazing Telescope Resolution: Max Res with Pieced Mirrors?
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Graduate What Steps Are Missing in Deriving Pogson's Law?
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Graduate Star whose pressure support is degenerate electrons.
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Undergrad Life on Earth: The Future of Humanity and the Impact of Space Exploration
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Undergrad At what volumetric flow rate will air fill a space vacuum at Earth's STP?
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Does anyone recognize this precession matrix?
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Undergrad Computing the period of a meteor using two ways.
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Graduate Effects of Solar Flares on the Moon and Equiptment used for lunar exploration
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Undergrad Cracovians Anyone? How do they work?
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Graduate The history of orbital element methods
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Undergrad Finding the position of an object 1800 years ago?
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Undergrad Why Is the JUICE Mission Targeting Ganymede Instead of Europa?
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Undergrad Number of Planets with Circular Orbits: Probability & Science
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Graduate Calculating kinetic energy of all matter
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