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 Is Our Universe Flat or Embedded on a Singularity?
- Ganzfeld
- · Replies 9 ·
Undergrad Seeking astrophysics consultant for Mars-based sci-fi series
- novasatori
- · Replies 1 ·
Graduate Is there an Age Problem in the Mainstream Model?
- Garth
- · Replies 22 ·
High School Why does Venus orbit the sun in the opposite direction?
- EMAAN
- · Replies 10 ·
Graduate Accelerating Universe: Experiments, Acceptance & Implications
- Chen
- · Replies 15 ·
Graduate Strangeness Nuggets to Strangeness Condensation
- Chronos
- · Replies 40 ·
Graduate Scale-related mass density and cosmological problems in universes with energy conservation
- wolram
- · Replies 7 ·
Graduate Could black holes be the creators of galaxies?
- ChongFire
- · Replies 3 ·
Graduate Hyperbolic structures in the universe
- Loren Booda
- · Replies 4 ·
Undergrad Experiments that modeled blackholes
- daniel_i_l
- · Replies 1 ·
High School What Did Ancient Civilizations Discover About the Universe Before 3000 BC?
- dansydney
- · Replies 6 ·
High School How did scientists first estimate Earth's mass?
- argonurbawono
- · Replies 2 ·
A couple of free books to download
- Azael
- · Replies 3 ·
Graduate Cataclysmic Variables spin rates
- toph
- · Replies 2 ·
High School Did the Black Hole in Superman Returns Resemble a Type Ia Supernova?
- kxtreme
- · Replies 2 ·
Graduate Can Hawking radiation particles explain dark matter?
- alias25
- · Replies 5 ·
Graduate Spawn of black hole thought experiment
- Instine
- · Replies 5 ·
Undergrad How do you imagine a finite universe?
- wolram
- · Replies 71 ·
Hubble's camera goes into safe mode
- neutrino
- · Replies 3 ·
Graduate What causes coronal loops in the solar corona?
- Michael Mozina
- · Replies 19 ·
Undergrad Photon coming from a far away star is redshifted?
- Ratzinger
- · Replies 12 ·
Graduate How Does a Tiny Dot's Mass Distort Space Time?
- Intuitive
- · Replies 1 ·
Graduate Hubble Recession vs. Moon Recession
- kmarinas86
- · Replies 7 ·
Undergrad Is Dark Matter Invisible and Untouchable?
- tribdog
- · Replies 21 ·
Graduate Tensor Vector scaler theories.
- toph
- · Replies 5 ·
High School How many Kuiper Belt objects have been detected so far?
- big man
- · Replies 6 ·
Undergrad What Are the Expansive and Contractive Cycles of the Universe?
- shawngoldw
- · Replies 1 ·
Graduate The universe, are we on the right track?
- Leonardo Sidis
- · Replies 3 ·
Undergrad How do scientists predict star and planet positions?
- mubashirmansoor
- · Replies 1 ·
Undergrad What If Earth Suddenly Reversed Its Rotation or Changed Its Axis?
- Mt. Nixion
- · Replies 3 ·
Graduate Is a zero energy universe a consequence from FRWL equations
- hurk4
- · Replies 1 ·
Undergrad Does rising ocean level affect Earth's rotation and Moon's orbit?
- dimensionless
- · Replies 4 ·
Graduate Book suggestion in reply to question from oldman
- marcus
- · Replies 19 ·
Undergrad Deriving Distance Modulus: m - M = 5log(d/10)
- toam
- · Replies 2 ·
Graduate What gave rise to the fundamental constants and laws of physics?
- Markrids
- · Replies 5 ·
Graduate Relative peculiar velocity of MBR vs that of neutrino background
- Loren Booda
- · Replies 3 ·
Undergrad Calculating the gravitational accelleration on the surface of a planet
- dimensionless
- · Replies 4 ·
Undergrad Why is my computer not moving away from me in an expanding universe?
- Andy_Electron
- · Replies 3 ·
Graduate What Causes Craters to Center Themselves on Other Craters?
- smurfslappa
- · Replies 1 ·
Graduate 20 trillion solarmass hot cloud going 750 clicks
- marcus
- · Replies 2 ·
Graduate Do MECO models match observations of galactic black holes?
- Nereid
- · Replies 2 ·
Graduate Do Black Holes Experience Inertia and Gravity?
- string querry
- · Replies 6 ·
Do you believe in dark matter and dark energy or modified gravity?
- brahma
- · Replies 45 ·
Can telescopes see the flags and landing modules left on the moon?
- sneez
- · Replies 5 ·
Graduate Is the Universe Beyond Our Perception?
- Mt. Nixion
- · Replies 2 ·
Graduate Problems with light travel-time distance in cosmology
- marcus
- · Replies 9 ·
Who created this running difference image?
- Michael Mozina
- · Replies 2 ·
Graduate Starkman tinkers with MOG (relativistic MOND)
- marcus
- · Replies 3 ·
Graduate Terminal Velocity: Speed Beyond the Universe
- drakken1985
- · Replies 3 ·
What existed before the big bang?
- time traveller d
- · Replies 42 ·
Undergrad Is the Big Bang Like a Ripple in a Pond?
- fr0st2k
- · Replies 8 ·
Graduate Was the Big Bang a Black Hole Explosion?
- mateuszica
- · Replies 1 ·
High School Could Life Be Evolving in Galaxies 1.5 Million Light Years Away?
- IllogicalDreamr
- · Replies 2 ·
High School Solar and Lunar exposure tables information
- Labguy
- · Replies 1 ·
Stargazing Have you seen the stunning night sky in New Mexico captured with a Canon 300D?
- larkspur
- · Replies 7 ·
Graduate Eclipsing binaries (references to data and models?)
- robphy
- · Replies 7 ·
Graduate Does space expand through us or stay attached to us?
- Jimmy Snyder
- · Replies 50 ·
Graduate Is Causality Fundamental in the Universe?
- kmarinas86
- · Replies 10 ·
High School Where Can I Find a List of Stars in Gould's Belt?
- hellfire
- · Replies 9 ·
Graduate How does MOND differ from the inverse-square law?
- Chaos' lil bro Order
- · Replies 3 ·
Graduate Gammaray Bursts (all you ever wanted to know)
- marcus
- · Replies 12 ·
Graduate New map of the galaxy (Levine Blitz Heiles)
- marcus
- · Replies 4 ·
High School How did Einstein show the universe was expanding?
- waznboyd
- · Replies 3 ·
Stargazing Meade DSI Pro II: First LRGB Photo of Whirlpool Galaxy
- russ_watters
- · Replies 3 ·
Stargazing Telescope recommendation for a beginner under $100
- Knavish
- · Replies 3 ·
Graduate What Effect Does Cosmological Expansion Have on Solar System Mass?
- pervect
- · Replies 6 ·
Undergrad Redshifts, what frequencies are they looking at?
- dimensionless
- · Replies 12 ·
Graduate Structure of the Milkyway Spiral Redifined
- neutrino
- · Replies 2 ·
Graduate Photon frequency loss over time?
- rcgldr
- · Replies 40 ·
Graduate Gravitational collapse, star precipitation and black hole formation.
- oldman
- · Replies 10 ·
Is the universe examining itself?
- RAD4921
- · Replies 56 ·
Graduate What Density of Radiation Triggers Gravitational Clumping and Black Holes?
- moving finger
- · Replies 1 ·
Graduate Pioneer anomaly and dark matter: are these real physics issues?
- Farsight
- · Replies 17 ·
Graduate How does the cosmic microwave background (CMB) define a cosmological frame?
- helenwang413
- · Replies 3 ·
Undergrad Electromagnetic waves and dak matter
- Quantum1332
- · Replies 7 ·
Graduate The Virial theorem and Cosmology
- oldman
- · Replies 27 ·
Graduate Gammaray Sky animation (what GLAST will see)
- marcus
- · Replies 0 ·
Graduate How could the universe possibly expand?
- cliowa
- · Replies 2 ·
High School What Are Color Shifts Like Redshift in Science?
- eggman
- · Replies 20 ·
Graduate Why logic and reason fail when we try to trace back the origin of universe
- naveen
- · Replies 20 ·
High School Terraforming Mars: Strange Ideas and Possibilities
- drakken1985
- · Replies 2 ·
Graduate Cosmology-Particle Physics connection (Mark Trodden)
- marcus
- · Replies 1 ·
Graduate What could deep underground astronomers observe about the universe?
- Nereid
- · Replies 23 ·
Graduate Alternative Solutions to Deflecting Asteroids or Comets From Earth
- drakken1985
- · Replies 5 ·
Undergrad Can a Planet's Gravitational Force Prevent a Comet or Asteroid Collision?
- MathematicalPhysicist
- · Replies 3 ·
High School Does the Moon's Orbit Stay the Same?
- mubashirmansoor
- · Replies 7 ·
High School Is this YouTube meteor impact simulation realistic?
- darkar
- · Replies 2 ·
Graduate What is the Accreting Matter Paradox in Astrophysics?
- StatusX
- · Replies 1 ·
Voyager 2 Detects Odd Shape of Solar System's Edge
- scott1
- · Replies 3 ·
Graduate Molecular Hydrogen at the Edge of Universe
- Astronuc
- · Replies 9 ·
High School Can stars escape their galaxies and exist between them?
- wolram
- · Replies 8 ·
Graduate Does the Hubble Constant Variation Over Time Affect the d/R = v/c Equation?
- kmarinas86
- · Replies 2 ·
Undergrad Can the Mass of Cosmic Rays in the Universe Be Calculated?
- Qmon
- · Replies 6 ·
High School Why Won't Earth Fall into the Sun?
- FeynmanMH42
- · Replies 7 ·
Graduate How to probe the homogeneity of the universe ?
- brahma
- · Replies 8 ·
Undergrad How did Leverrier and Adams calculate Neptune's position?
- ZZ Top
- · Replies 2 ·
Graduate Would people age faster or slower in a 92-day Earth orbit around another star?
- complexPHILOSOPHY
- · Replies 10 ·
High School Does Jupiter have a solid core or is it gas all the way through?
- Quadruple Bypass
- · Replies 9 ·
High School Is there white hole in the universe?
- the Physic freak
- · Replies 10 ·
Graduate How do you interpret the Robertson-Walker metric
- oldman
- · Replies 26 ·