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 Peculiar vs. Irregular galaxies? Difference?
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Undergrad How to Calculate Distances and Luminosities of Stars?
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Graduate Why black holes do not have color charge?
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Undergrad Expanding Light: Wave's Radius Increase - Why Not Dim?
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Graduate Galaxy Questions: Types, Shapes, Evolution & Masses
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High School Why Is the Earth Slowing Down?
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Graduate Is Space Really Falling Faster Than Light Near a Black Hole?
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High School Photos of the our milky way galaxy
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High School Spin of planets, bigger means faster?
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High School Discovering the Mystery of Satellite Shadows: A Beginner's Guide
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Graduate CMB Anisotropy: Measuring Our Motion Through Space
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Graduate What Does 'Quake Confinement' Mean in Astrophysics?
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Graduate Wormholes and time travel - Problem
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Graduate What is Causing The Universal Expansion?
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High School How do astronauts communicate with Earth during space missions?
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Galaxy's centre tastes of raspberries and smells of rum
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Undergrad How to Calculate Inclination Angle for Galaxies in the Tully-Fischer Relation
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High School Suggest topics for a 1-sem HS Astronomy course
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High School How does the Satellite manage to stay in earth's orbit?
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Stargazing Buy a Telescope Under $400 | Astronomy For Beginners
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Undergrad Age of the sun+age of previous stars = universe ?
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High School Looking at center of our galaxcy question.
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Graduate Is spacetime truly flat without gravitational influences?
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Graduate How Does Magnetism Influence Black Holes Despite Escape Velocity Challenges?
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High School Plotting Elliptical Orbits for Beginners
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High School Can anyone explain the need for elipses?
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Graduate Is spacetime the surface of a 5 dimensional ball.
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Undergrad Turbulent Cells and Telescopes: Seeking Help
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Graduate What do you think about the Cosmic String theory?
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High School Which is Better for Stargazing: Sea Level or High Elevation?
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High School Can we travel back and forward in space?
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Undergrad What Are Good Resources for Understanding the M-sigma Relationship in Astronomy?
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Undergrad What would we need for a warp drive?
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Undergrad Calculating time based on solar position
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Undergrad Is 10 Arc Seconds Accurate Enough for Sending Objects to the Moon?
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High School Understanding the Moon's Role in Tides
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Graduate Does black holes exist all around us?
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Graduate What density does something have to have to be considered a black hole?
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High School Lightning in Space: Fact or Fiction?
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Graduate Getting vectors out of JPL Horizons
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High School Looking for the Virgo constellation
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Undergrad What Are Orbital Vectors and How Do I Calculate Them?
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Graduate How do you work out the largest angular scale to which it is sensitive
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High School Why is the dust tail of a comet a tail?
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Is It Possible To View The Milky Way In The UK
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Undergrad Wormholes for Dummies Question .
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Local Group Center: Direction of Center
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Undergrad What Happens If a Spaceship Exceeds the Speed of Light?
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Graduate Solving Spectral Plotting Confusion with Hitran Database Data - Help Needed!
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Graduate Creating a Mini Self-Sustaining Star: The Superstrong Chamber Experiment
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High School Making The Best of Light Polluted Skys
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Graduate How do solar neutrinos interact with nuclei to create radioactive elements?
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Poll: Have you ever seen a UFO, alien or cosmic object?
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Undergrad Calculating Delta-V in Hohmann Transfer Equation
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Undergrad Why is the center of the galaxy located on the elliptic?
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Graduate Questions about black holes for a fictional story
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Undergrad Stationary satellite in high latitude
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Undergrad Question about the expansion of the universe
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Undergrad Star Catalogue Question - Stars near the Ecliptic
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Undergrad Deorbiting q, low speed reentry?
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Graduate Are Black Holes Theoretical Phantoms?
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Graduate Initial Mass Function physics problem
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Graduate Can I Survive Moving Into a Black Hole?
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How Can We Effectively Communicate with Extraterrestrial Life?
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Graduate When Should I Study Thermal Physics Relative to Quantum Mechanics?
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Stargazing Will Reflector Telescope Work Without Eyepiece?
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Stargazing Help My telescope fell and now it won't focus
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Graduate Are space and time definable without atoms?
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High School Help w/Viewing Saturn and other stuff
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Graduate Solution help for the Geodesic Equation
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North Korea about to launch ICBM test and/or space satellite
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Undergrad How is the Age of the Universe Calculated Despite Light Travel Distance?
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High School Answer: Declination of the Sun - Spring Equinox
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Graduate Is the universe infinite in size?
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Graduate How do Black holes radiate energy?
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Undergrad How do the s-process and r-process create elements in stars?
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Undergrad Why Does Our Galaxy's Center Look Bright Despite a Black Hole?
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Undergrad Prof. Kaku's approach on why we haven't met intelligent E.T. life.
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North Korean Satellite Fate | Know Today's Launch
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Undergrad Calculate distance between stars in a globular cluster?
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Undergrad Could Apophis Change Earth's Future in 2036?
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Graduate Are Gravitational Effects Infinite in Black Holes and Wormholes?
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Undergrad What is the synodic period of Mercury?
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Stargazing Telescopes: Magnifiers or Time Machines?
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Graduate Age of universe and time dilation.
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Undergrad Is a Space Station More Cost-Effective than a Moon Base?
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Graduate How Can I Mimic the Best Fit for HD17156b's Radial Velocity Data?
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Is there actualy any hi-res footage made with MARS rover?
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Graduate Max Distance & Time Til Sky Nearly Black
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  • Poll Poll
Undergrad Is 34% far or slightly smaller than 100%?
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Graduate Emitted radiation and absorbed solar radiation
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If we could travel near the speed of light
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Undergrad How is the energy transfered back to the Moon
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High School Titan - the next closest thing to Earth.
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Where Can I Find the Darkest Places for Star Gazing in the Northeast?
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High School Help with Jupiter and Saturn please
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Graduate Why doesn't iron give off any energy when it is created through nuclear fusion?
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Graduate Does time slow down when falling into a black hole?
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Graduate Space where General Reletivity Resides
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Graduate What is the heaviest element that a supernova can produce?
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