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 Planets & Relativity: Time Dilation in Our Galaxy
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Graduate Effects of perpendicularly-approaching asteroid on Earth
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Curiosity Rover makes Earth shattering discovery
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Graduate Solar wobble - what are the effects of Jupiter and Saturn?
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Graduate Population III Stars Metallicity
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Graduate Omega effect: turning poloidal magnetic field into toroidal field
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Undergrad Any difference on Satellite location between W135 and W075?
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Graduate Cosmology - given omega_m and a static universe, find the range of values of q_0
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Graduate Classic Papers in Astronomy and Cosmology
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Graduate How can a star in the Milkyway be nearly as old as the universe?
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Undergrad Calculations for sun position follower
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Graduate Black hole accretion: angular momentum loss
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Graduate What do broad and strong emission lines mean and what are the main types of AGN?
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Graduate Redshift of spinning star surface as seen on axis
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Undergrad White Dwarfs,Black Dwarfs & neutron star
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Graduate How orbiting bodies arrange themselves in orbital resonance?
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Graduate Is the universe expanding or it is circuiting?
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Graduate Black Hole Radiation: Stephen Hawking's Theory Explained
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High School Please, help with observation plan
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Undergrad What is different in Solar Radio vs Radio Flux 10.7 cm?
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Undergrad Is there some liquid planets out there?
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Undergrad Active Galaxies and the Unified Model
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Graduate Classsification of Pre main sequence(PMS) stars
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Undergrad Low and high orbital energy differences (getting there and back)
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Undergrad Discovering the True Speed of Light: A Question on Its Absolute Nature
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High School Why Is the Solar System Structured the Way It Is?
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High School Where can I find a downloadable database of stars?
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High School What Existed Before the Big Bang?
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Graduate Confusion about redshift in a universe with accelerating expansion
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Undergrad Is light pollution causing wasted energy and costing billions of dollars?
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Graduate Deuterons used up before reaching the A=5 and 8 bottlenecks?
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High School General question, where can I learn about all the constellations and
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Stargazing Telescope Resolving Power Limits
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Graduate Does Photon Emission Influence Celestial Body Movement?
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Graduate New hab-zone planet HD40307g distance 42 ly, estim 7 earthmass
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Graduate Is There a 100 Solar Mass Black Hole in Orion Nebula?
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Graduate What is the nature of matter and its relation to eternity?
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Graduate Help understanding solar imaging wavelength and coronal temp
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Graduate Z ~ 11 galaxy observed by CLASH most distant as of Nov 2012
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Undergrad Is Space Considered a Medium for Photons and Other Waves?
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High School What is the Definition of Space in Physics?
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High School Method for spaceship to be absolutely still in space
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Undergrad Orphan planets, i.e., planets not in a solar system
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Undergrad Is a Webcam Better than a DSLR for Astrophotography?
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Undergrad Searching for Colliding Stars: Has the Phenomena Ever Been Observed?
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Adjective term of pertaining to a non-Earth moon
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Graduate Is spacetime not the same as space and time ?
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Graduate If doppler shift can be caused by gravity
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Graduate Is the Universe Truly Infinite and Ever-Expanding?
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Undergrad Will Earth pass through the galactic plane in 2012?
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Graduate Since the Sun is losing mass, can a planet's orbit change be measured?
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Graduate Understanding Jeans Instability & Masses
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Undergrad Need Help Understanding Angular Resolution
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Graduate Longitude of the Ascending nodes (calculation, wrong data perhaps?)
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Graduate Inverse square law resolves Olbers' paradox
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High School Since the earth orbits in an ellipse, not a circle
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Undergrad Does Dark Energy Repel Light and Cause Damage?
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Undergrad Can Black Holes Bend Time?
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Graduate Does time run fast near universe's edge?
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Stargazing 60-80 mm refracting telescope for beginners
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Undergrad How does momentum dumping work on the Hubble Space Telescope?
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Graduate Can a Spacecraft Achieve Light Speed Using Jupiter's Magnetic Field?
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Graduate What is the Color of a Neutron Star?
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Stargazing How do radio telescopes form images?
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Undergrad How to convert flux from counts to erg.
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Stargazing World’s largest Cherenkov telescope opens
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Undergrad Urban Space Saving: Reducing Traffic with Raised Roadways and Shops
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High School Does the Earth actually revolve around the Sun
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Undergrad Can Amateur Telescopes Detect Exoplanets?
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High School Planet Found Orbiting Alpha Centauri
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Undergrad Just how dark is Pluto from orbit? How about Saturn?
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Undergrad Position and angle of Earth/Moon/Sun and timing
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High School Can I see stars through the moon?
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Undergrad Could Ice Form Inside the Sun?
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Undergrad What is the Scientific Understanding of Gravity?
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Interesting simulation of a spiral galaxy evolution.
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Undergrad What Determines the Diameter of a Moon Halo?
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High School Did Mars Once Have Flowing Water?
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Graduate What is the distance needed for a rocket to reach a velocity of 0 on Planet X?
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Graduate Can Shock Waves Initiate Protostar Formation?
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Undergrad Apparent size of comets in images from the SOHO satellite
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Graduate Understanding Spectra Shifts of Distant Stars
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Graduate Periodicity in the mass of planets?
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High School Life in the Early Universe: Origins and Evolution
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Undergrad Is Retro-Rocket Still a Relevant Term for Slowing Down Satellites?
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High School Can a person catch an object in space and stop it without being pulled along?
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Graduate Does Light Exist Outside Time?
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Undergrad Can someone explain abberation of starlight?
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Graduate Could the Formation of Great Voids be Explained by Ordinary Laws of Motion?
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Undergrad How Does the Moon Influence Earth's Rotation and Orbit?
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Oceans vs Outer Space: Colonization & Resources
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Graduate Vogt-Russell Theorem: Learn & Model Stellar Structures
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Graduate Temperature of planets from their Luminosities at specific wavelengths.
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Graduate Spacetime Crystal: Theory & Possibility
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Graduate Gravity Assist Oberth Effect Sun
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Undergrad Is Dark Rift a Rotating Cloud or a Dust Belt Surrounding the Galactic Center?
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Graduate Higgs Boson and Dark Matter / Dark Energy
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Graduate Jupiter and Saturn - Back and Forth in the Early Solar System?
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Solar Activity Trends: Historical Chart and Validation for Current Increase
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Graduate How did gravity build astronomical objects that rotate?
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