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.
Threads
Graduate Kinematic GR models of expansion
- jonmtkisco
- · Replies 24 ·
Graduate Gravity's effects on primordial plasma
- Chaos' lil bro Order
- · Replies 3 ·
Undergrad What Are the Best Forums for Discussing Non-Mainstream Cosmology Theories?
- 81+
- · Replies 46 ·
High School Could ever Pluto slam into Neptune?
- pixel01
- · Replies 3 ·
Undergrad Black holes created the big bang?
- xdawpax
- · Replies 27 ·
Graduate Big Bang v. Cyclic Universe models
- Nabeshin
- · Replies 18 ·
Graduate Blackholes, Jets and Dark Matter.
- blimkie.k
- · Replies 3 ·
Drawing moon phases - what’s your opinion?
- wins_shmer
- · Replies 8 ·
Undergrad Calculating Semimajor Axis of Meteor Orbit
- crystalplane
- · Replies 1 ·
Is the Tracking Error of the Telescopic Scope Mount a Dealbreaker?
- Chronos
- · Replies 5 ·
Undergrad Gravity and curvature in spacetime
- jal3308
- · Replies 5 ·
Graduate Is the Hubble constant, constant?
- yuiop
- · Replies 19 ·
Graduate Einstein@Home search for periodic gravitational waves in LIGO S4 data
- wolram
- · Replies 20 ·
Undergrad Light bending in a spacecraft due to gravity
- _Muddy_
- · Replies 9 ·
Graduate Does deuterium abundance rule out MOND and MOG?
- Ai52487963
- · Replies 18 ·
Undergrad Earth's rotational speed in the past.
- Dana Dedrick
- · Replies 5 ·
Graduate Animation/visualization of galactic rotation rates (dark matter)
- Peeter
- · Replies 7 ·
Graduate Why Can't Flows in Phase Space Cross?
- Eidos
- · Replies 2 ·
Graduate Empty universe except for three indentical planets
- Alan McDougal
- · Replies 7 ·
High School Why do we experience seasons on Earth?
- cernole
- · Replies 10 ·
Graduate NASA's GLAST mission launches for gamma-ray astronomy
- marcus
- · Replies 4 ·
Graduate Spacetime diagrams and proper time
- FunkyDwarf
- · Replies 3 ·
Graduate Is Light Attracted or Converted by Black Holes?
- marrsal
- · Replies 9 ·
Undergrad How do we still receive light from quasars billions of years after they formed?
- Alan McDougal
- · Replies 27 ·
Graduate We are in a Schwarzschild black hole-T or F?
- marcus
- · Replies 137 ·
Graduate Is the Radius of Curvature of the Universe Constant Over Time?
- Niles
- · Replies 3 ·
Graduate Measuring tangential velocity of receding stars or quasars
- aniketp
- · Replies 1 ·
Graduate Is gravity really a force in the expansion of the universe?
- Ascending One
- · Replies 8 ·
Graduate Video lecture on Loop Quantum Cosmology
- marcus
- · Replies 6 ·
Graduate How Do Vacuum Energy and the Cosmological Constant Influence Universe Expansion?
- NYSportsguy
- · Replies 1 ·
Undergrad What if Mars Had Been Closer and Venus Farther?
- sanman
- · Replies 7 ·
Graduate Ripple deSitter universe-Randono cannonball analog
- marcus
- · Replies 2 ·
Graduate CMB temperature asymmetry: new physics or observational artifact?
- oldman
- · Replies 12 ·
Graduate Could a billion light year void result from a collision with another universe?
- poeteye
- · Replies 1 ·
Graduate Gravity and coordinate acceleration
- stevebd1
- · Replies 1 ·
Graduate Reading spot diagrams and longitudinal aberration graphs for lenses
- chemisttree
- · Replies 1 ·
How to solve every physics problem ever and understand the universe
- Green Zach
- · Replies 20 ·
Graduate Positive Curvature: Maximum Area of Equilateral Triangle
- randa177
- · Replies 2 ·
Graduate Calculate how mass creates a curvature in relativity
- Ignition
- · Replies 1 ·
Graduate How Relativity say about redshift in terms of curvature?
- Ignition
- · Replies 1 ·
Undergrad Solar Radiation AM - Danilo's Question
- danroa
- · Replies 5 ·
Where to find a lunar spectrum graphic
- orubi
- · Replies 1 ·
Undergrad Why Syrius in the past was a red star?
- Ignition
- · Replies 1 ·
Witness GLAST Launch: Now on Virtual Institute of Astroparticle Physics
- Mirsoo_luna
- · Replies 2 ·
Graduate What do I use to determine rotational speed of solar nebula?
- shejinx
- · Replies 1 ·
High School What is dust, and what about stellar dust?
- anonymoussome
- · Replies 7 ·
What would the night sky look like from the edge of a distant galaxy?
- marrsal
- · Replies 31 ·
High School Is Our Solar System Really 2D in Planetary Rotation?
- lewdtenant
- · Replies 9 ·
Graduate Can String Theory Explain Quantum Gravity and Fundamental Constants?
- jonmtkisco
- · Replies 37 ·
Graduate Accumulation of Mass in Stellar Formation?
- maverick_starstrider
- · Replies 8 ·
GLAST scheduled for launch on 3 June
- marcus
- · Replies 16 ·
Stargazing Discover the Wonders of the Night Sky with WorldWide Telescope
- Daniel Y.
- · Replies 6 ·
Graduate Entanglement instead of inflation
- Loren Booda
- · Replies 9 ·
Graduate How Can Black Holes Form and Behave in Our Universe?
- Tachyonie
- · Replies 5 ·
Graduate Derivation of Escape Velocity Inconsistency
- Michael King
- · Replies 13 ·
Graduate There's more starlight than we thought (nearly twice as much)
- marcus
- · Replies 9 ·
Did We Spot the International Space Station from Brockville, Ontario?
- blimkie.k
- · Replies 9 ·
Graduate Szapudi reasons to drop alternatives to dark energy
- marcus
- · Replies 17 ·
Graduate Optimal methods for terraforming Mars with impact events
- sanman
- · Replies 65 ·
Graduate Why Are We Not Constantly Bombarded by Neutrinos from the Stars?
- moe darklight
- · Replies 21 ·
Undergrad When Will Earth Be Tidelocked To The Sun?
- Fennelgiraffe
- · Replies 3 ·
Graduate Why do stars with masses greater than 1.2M(sun) have convective cores?
- vertices
- · Replies 5 ·
Is Our Universe Contained Inside One Atom?
- myfinalcoffinx
- · Replies 5 ·
Graduate New to the board. Gravity questions
- tommac
- · Replies 4 ·
Graduate Can Singularities Exist if Points in Space Are Finite?
- djeitnstine
- · Replies 7 ·
Graduate Was the Universe Not Perfectly Homogeneous at Photon-Decoupling?
- Niles
- · Replies 4 ·
Graduate Visualizing Astrophysical N-body Systems, John Dubinski
- shalayka
- · Replies 3 ·
Undergrad Understanding Vapor Pressure Laws for Astrophysics
- ZachWeiner
- · Replies 1 ·
Graduate Has public interest in cosmology declined due to unmet promises?
- wolram
- · Replies 50 ·
Undergrad Effects of a decreased rotation veloctiy
- blimkie.k
- · Replies 2 ·
Undergrad What is the Temperature of an Electron?
- eminent_youtom
- · Replies 6 ·
High School What does it mean the number after the stellar class? Magnitude?
- Ignition
- · Replies 3 ·
Graduate Can Planets Form Without Stars?
- TShock
- · Replies 5 ·
Undergrad Sun formed on a core of a supernova?
- kamenjar
- · Replies 18 ·
Undergrad Planet formation and star formation
- TShock
- · Replies 6 ·
High School How much mass does the sun lose annually?
- Lacero
- · Replies 12 ·
Undergrad Gravitation attraction proportioned
- bkelly
- · Replies 22 ·
Graduate Refractive index of Martian atmosphere near surface
- Ex1
- · Replies 5 ·
Graduate Graph with Saul and Perlmutter's results
- Niles
- · Replies 2 ·
Graduate Good intro to cyclash universe by Steinhardt
- marcus
- · Replies 1 ·
Graduate Cosmic Accelerators summerschool videos
- marcus
- · Replies 3 ·
Graduate Simulating globular clusters over blackholes with Fortran
- Benzoate
- · Replies 6 ·
Graduate Frontiers and Controversies in Astrophysics Part 1
- gazzastone
- · Replies 1 ·
Graduate Is Redshift an Accurate Indicator of the Universe's Expansion Rate?
- _Mayday_
- · Replies 1 ·
High School What is the Difference Between an Open and Closed Universe?
- _Muddy_
- · Replies 9 ·
Graduate Could Variation in Light Speed Explain the Horizon Problem?
- xsavior
- · Replies 9 ·
Phoenix Mars lander records first weather readings
- blimkie.k
- · Replies 9 ·
Graduate What Is the Event Horizon Size When All Matter Is Infinitely Packed Together?
- Khursed
- · Replies 6 ·
SK15075PEQ3-2 150mm Newtonian reflector specifications
- Ignition
- · Replies 9 ·
Graduate Reading my first Astrophys paper
- ZachWeiner
- · Replies 3 ·
Graduate Superwind phase in stellar evolution
- vertices
- · Replies 5 ·
Graduate Is the Pioneer Anomaly Evidence of Slower Movement Than Physics Predicts?
- PhantomOeo
- · Replies 1 ·
Graduate Black Hole Questions - Answers to Your Queries
- dmt740
- · Replies 3 ·
Undergrad Black holes and magnetic fields?
- The Moog
- · Replies 3 ·
Graduate Xray flash warns of supernova explosion
- marcus
- · Replies 7 ·
High School Radio waves are electromagnetic.Right?
- anonymoussome
- · Replies 1 ·
Graduate Could dark matter explain gravitational anomalies within atoms?
- Jøhn
- · Replies 22 ·
Graduate Each planet's angle from it's argument of perihelion
- Philosophaie
- · Replies 2 ·
Graduate Why is modified Newtonian dynamics (MOND) dismissed over dark matter?
- astrorob
- · Replies 14 ·
Graduate Is There Evidence of an Opposite to Black Holes in the Universe?
- mkbh_10
- · Replies 6 ·