Astronomy, Astrophysics, Cosmology Forum

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Join in expert discussion on the topics of Astronomy, astrophysics and cosmology. This may include discussion on celestial objects, space, and the physical universe as a whole. Mainstream science only.
Graduate 'First Light' and the Universe's early years
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High School Begin Astronomy: Tips for £150 Telescope in England
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Graduate What is the current state of the universe and its expansion?
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Graduate IMF of First Stars: R. Schneider et al.
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Graduate More about the Cooperstock and Tieu model
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Graduate What Are the Libration Points in the Mars, Phobos, and Deimos System?
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Undergrad Is the Milky Way a Resonance-Ring Galaxy?
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Undergrad New study shows Dark Matter isn't needed? Relativty explains it?
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Undergrad Why Do All Galaxies Have a Supermassive Black Hole at Their Centre?
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Graduate Star formation rates z=6 to z=10
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Graduate Any such equation to relate spacetime to energy/mass
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Undergrad Converting from the horizontal system to the equatorial system
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Graduate How Do I Solve These Complex Astronomy Problems?
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Graduate Wraparound Universe: Is It Feasible?
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Graduate New study shows Dark Energy isn't needed? Relativty explains it?
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Undergrad How do scientists put satellites into space
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Stargazing How can stacking improve astrophotography?
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Undergrad How can I determine orbital elements using observations of an asteroid's motion?
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Undergrad Is the inernal energy of the universe decreasing?
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Graduate What Challenges Did I Face in Capturing Images of the Andromeda Galaxy and Mars?
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Find Out Who Has a Myspace Page on PF - Share Your Addiction!
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Graduate Message in the Sky: The Mysteries of the Heavens
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Undergrad Superman Holding the Moon: Is It an Impressive Feat?
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Viewing Moon & Milky Way: Best Time & Rare Events
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Graduate Reionization: A Primer on Early Universe Physics
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Undergrad Deriving Equations for Moon's Orbital Acceleration
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Graduate Quickie: CP and power spectrum of the CMB
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Undergrad Exploring the Habitable Zone and Tidal Lock in Exoplanet Systems
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Undergrad How Do You Determine Visible Right Ascension and Declination Coordinates?
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Graduate Star Formation: Density, Temperature & Fusion
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High School How Does the Size of an Eclipsing Planet Affect Star Brightness?
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Graduate Learning About the Three Body Problem & Hamiltonian Systems
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Undergrad How does the cosmic background radiation works
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Undergrad Weak and strong anthropic principle
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High School Observing Unusual Red Star in Scorpius Constellation
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Undergrad What Would Happen to Gravity If Earth Stopped Spinning?
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Undergrad Calculating Space Probe Trip to Neptune with Jupiter Assist
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Undergrad Gravitational effect of sun on earth
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Graduate Where are the real definitions of homogeneity and isotropy?
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Graduate Has Dark Matter's Mystery Finally Been Solved?
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Graduate What Would Happen if You Tried to Move Beyond the Edge of the Universe?
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Undergrad How Are Planets Detected Through Transit Method?
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Undergrad What Are Physical Symmetries and How Do Particles Transform?
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Blackhole gulps down Neutron Star
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Graduate Semi-pop review of structure of universe
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Graduate UV Galaxy Surface brightness says no expansion
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Graduate The Apollo Laser Ranger Retroreflector Experiment
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High School Is NASA's Future Tied to Russian Spacecraft?
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Undergrad Heat of objects entering an atmosphere?
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Graduate A Case For an Indeterministic Universe
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Undergrad What Day Will You See the Same Star Rise at 10:40pm?
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Undergrad What Is Dark Matter Made Of?
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Graduate Dark matter highlights extra dimensions
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Stargazing Did I finally capture decent pictures of Mars and other celestial objects?
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Graduate Understanding Object Movement in Space: Factors Affecting Speed Between Galaxies
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High School Where Can Beginners Find Good Astrophysics Websites?
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Very Large Telescope Project - Amazing Images
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Graduate The Susskind Counter Information Paradox?
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Undergrad Saturn's Moon Iapetus: Big Wall & Geology Mystery
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New Planet "Xena" and it's moon is "Gabrielle"
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High School Discover the Innovative Space Ladder Technology | Learn More Now!
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Graduate No problem, always happy to provide some clarification.
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Undergrad Is the LuniSolar theory a legitimate scientific theory?
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Undergrad How do astronomers measure an objects angular size?
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My Hero: Waid Mobile Observatory
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Undergrad Will the Expanding Universe Break the Attractive Forces Between Particles?
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Undergrad Explore Venus: Mystery, Atmosphere & Surface Features
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Undergrad Greek Astronomers & Telescopes: Determining Magnitude & Brightness
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Graduate Galaxies recede faster than light
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Graduate Is a Euclidian Model the Solution to the Gravity=Geometry Conundrum?
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Glimpsing a Mysterious Whizzing Object in the Night Sky
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Undergrad How Can We Quickly Calculate Distances to Stars Without Parallax?
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Graduate Is the Expansion of the Universe Leading to Heat Death?
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Graduate Early Reionization: HUDF-JD2 Examined
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Graduate Could There Have Been a Virtual Particle Era Before the Planck Time?
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Graduate Horizon scale at the onset of cosmic acceleration
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High School What Are the Best Introductory Articles on the Origins of the Universe?
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Undergrad Are Black Holes Responsible for Galaxy Formation?
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Are we somewhere in the middle of everything?
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What are the notes for Course Navy: Astrodynamics Halo?
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High School Between the moon and the Earth a Spaceship travels
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Graduate Could Life Exist in a Universe with 1D Time and 2D Dimensions?
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Graduate Blackhole Question (involves Light)
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Graduate Exotic particles destroying the universe
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Undergrad F=mv^2/r and Geosynchronouse orbits
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Graduate Dimensions/parallel universe questions
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Undergrad Galaxy Death: Is Starbirth Rate Decreasing?
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High School The Weight of Black Holes: Physics Behind Tiny Masses with Giant Implications
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Garbage Universe: A Thought on Parallel Dimensions
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Stargazing Reflecting Telescopes: Hole in Picture at Focus?
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Stargazing Trig in Telescopes: Theta Formula & Astronomy Sites
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Graduate Galaxy Rotation Curves Without Non-B. Dark Matter
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High School Space-Time dimentions & plane of Sxistence
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Graduate Pure randomness & the incomprehensible universe
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Graduate Can a powerful telescope reveal the true limits of the universe's distance?
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Graduate Is the Universe Shaped Like a Dodecahedron?
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Graduate [Andromeda] Fast traveling stars
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High School Project in relation to Einstein on geo-reactors
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Graduate Is the universe still expanding?
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Graduate Quantum Geometry and Schwarzschild Singularity?
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