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 Moving through hyperspace to bypass spacetime warping and travel faster than time
- kokain
- · Replies 27 ·
Graduate Which force drives the expansion of the universe?
- Pietro
- · Replies 12 ·
Undergrad What happens when the supermassive black holes of Andromeda and the Milky Way collide?
- pnjabiloafer
- · Replies 19 ·
Graduate Are There Stars with Highly Eccentric Orbits Around the Center of Their Galaxy?
- alpha_wolf
- · Replies 1 ·
Graduate Did Hawking's Dublin Talk Redefine Quantum Gravity Observables?
- marcus
- · Replies 8 ·
Undergrad Cause of Billiard Ball Spin: Celestial Connection?
- IMMSHARMA
- · Replies 1 ·
Graduate Do physicists accept white holes as real?
- kernelpenguin
- · Replies 6 ·
High School Planet formation DOES happen in slow motion
- pnjabiloafer
- · Replies 8 ·
Undergrad Why does the moon cause tides if the sun's gravity is stronger?
- Parth Dave
- · Replies 13 ·
Graduate Can a small black hole exist inside a larger black hole?
- kurious
- · Replies 3 ·
High School Are you more likely to die from an asteroid impact than win Powerball?
- bozo the clown
- · Replies 16 ·
Graduate Is there a limit to the validity of laws as the universe expands?
- kurious
- · Replies 13 ·
Graduate Do Black Holes Generate Dark Energy?
- kurious
- · Replies 4 ·
Undergrad Can Objects Enter a Black Hole from an Angle?
- Echo 6 Sierra
- · Replies 8 ·
Undergrad Shock Wave in Space: Vacuum or Medium?
- wolram
- · Replies 4 ·
Graduate Is the Sun Distorting Earth's Space-Time?
- oscar
- · Replies 30 ·
Graduate X-ray survey of galaxy clusters challenges dark energy models
- wolram
- · Replies 167 ·
Graduate Can black hole density decrease if space inside expands like regular space?
- s4syth
- · Replies 14 ·
Graduate Do Black Holes Emit Higgs Particles in Hawking Radiation?
- kurious
- · Replies 1 ·
Graduate What Would Happen if a White Hole Collided with a Black Hole?
- Tim
- · Replies 17 ·
Graduate Can the Booda Cosmic Isotropy Duality Hypothesis Be Proven?
- Loren Booda
- · Replies 2 ·
High School How to learn the sky and teach an astronomy club
- Gale
- · Replies 10 ·
Graduate Can an infinite expanding universe have boundaries or an end?
- misanthropist
- · Replies 19 ·
Graduate Was the universe created as a point or in its current state?
- munky99999
- · Replies 3 ·
Undergrad Can Things Really Escape Black Holes?
- Tom McCurdy
- · Replies 4 ·
Graduate Theories of The Universe (and Reality)
- Brennen
- · Replies 15 ·
Hawking to present black hole findings at conference
- russ_watters
- · Replies 51 ·
Graduate Black hole might crunch the many planets into marble-sized spheres
- idontthinkright
- · Replies 7 ·
Graduate Are We Living in a Subuniverse Within a Multiverse?
- Imparcticle
- · Replies 1 ·
High School What Is Cosmology and How Does It Relate to the Speed of Light?
- somy
- · Replies 5 ·
Graduate Is dark energy the same thing as space itself?
- kurious
- · Replies 1 ·
Graduate Can a black hole have a singularity if its mass is finite?
- kurious
- · Replies 1 ·
Graduate Proof that gravity constant G = (3/4)(H^2)/[4(pi)(density)e^3]
- Nigel
- · Replies 20 ·
Graduate Gravity mechanism predicts G to within 1.7%
- Nigel
- · Replies 40 ·
Stargazing What Are Cool Research Ideas for a School Radio Telescope Project?
- Moose352
- · Replies 2 ·
Graduate Is Life an Anti-Entropic Zone in the Fabric of Space/Time?
- Lama
- · Replies 2 ·
Graduate Black holes and the Chandrasekhar limit
- Nenad
- · Replies 4 ·
Graduate Mass and Curved Space: A Question
- mee
- · Replies 4 ·
Graduate Matter distorts dark energy to create space-time
- kurious
- · Replies 3 ·
Graduate Do Neutrinos Escape Black Holes Unscathed?
- Yojimbo
- · Replies 1 ·
Graduate Is the Universe Truly Infinite and Expanding?
- misanthropist
- · Replies 5 ·
Graduate Can unequal expansion rates of spatial dimensions avoid singularities?
- Nacho
- · Replies 21 ·
Graduate Moving a spaceship through the aether
- kurious
- · Replies 1 ·
What astronomy concept fits this riddle about a sphere?
- kathkath
- · Replies 13 ·
Graduate Did dark energy dominate the expansionary phase after the Big Bang?
- s4syth
- · Replies 1 ·
Undergrad Hyperbolic interplanetary transfer
- dilasluis
- · Replies 2 ·
Graduate Is the Universe Collapsing or Expanding?
- pnjabiloafer
- · Replies 10 ·
Graduate Self Creation Cosmology - a new gravitational theory
- Garth
- · Replies 29 ·
Graduate Is the Universe Formed from a Giant Star and Black Hole?
- gunblaze
- · Replies 8 ·
Which planet, moon, or asteroid would you most like to visit?
- Entropy
- · Replies 15 ·
Graduate After star explodes it may turn into BH
- dedaNoe
- · Replies 4 ·
Graduate Is an event horizon actually observable or purely hypothetical?
- wolram
- · Replies 18 ·
Graduate Two black holes and the event horizon
- ExecNight
- · Replies 26 ·
Graduate LUNA CNO cycle results conflict with WMAP's universe age estimate
- shrumeo
- · Replies 22 ·
High School What produces Earth's magnetic field?
- alanveron
- · Replies 1 ·
Graduate Dark energy and oscillating universe?
- kurious
- · Replies 3 ·
Graduate Is the Redshift of Distant Objects Due to Expansion or Gravitational Effects?
- turbo
- · Replies 46 ·
High School Do Black Holes Rotate and Explode?
- munky99999
- · Replies 6 ·
Graduate Do black holes have any translational motion?
- Antonio Lao
- · Replies 8 ·
Undergrad Does the Sun's Changing Mass Affect Its Gravitational Pull on the Solar System?
- bdkeenan00
- · Replies 3 ·
Undergrad What Determines the Positioning of Protons and Electrons in the Van Allen Belts?
- darkar
- · Replies 1 ·
High School Space probe transmiting a pic to Eart
- bozo the clown
- · Replies 6 ·
Graduate How Can We Ever Find Antigravity ?
- Antonio Lao
- · Replies 16 ·
Undergrad What Makes Abell 2029 the Largest Known Galaxy in the Universe?
- Orion1
- · Replies 7 ·
Undergrad Why are planetary systems almost complanary?
- dedaNoe
- · Replies 6 ·
Graduate A 30 year test of General Relativity
- marcus
- · Replies 1 ·
Graduate Why hasn't variable light speed theory replaced inflation?
- shrumeo
- · Replies 20 ·
Undergrad Why Does the Universe Appear Redder Than Expected?
- Entropy
- · Replies 36 ·
Graduate Do dimensions apply in a universe without a center and shape?
- Blossom Morphine
- · Replies 1 ·
Undergrad How Does the Earth's Magnetic Field Affect Communication Systems?
- alanveron
- · Replies 3 ·
High School Pull of Gravity.Where it starts?
- gunblaze
- · Replies 3 ·
Undergrad How they steered cassini through saturns rings
- bozo the clown
- · Replies 3 ·
High School How come the moon is circling the earth?
- dedaNoe
- · Replies 11 ·
Tenth planet discovered beyond Pluto
- turin
- · Replies 6 ·
Undergrad Methane Cloud Found at Titan's South Pole
- Nommos Prime (Dogon)
- · Replies 9 ·
High School Cassini-Huygens mission to explore Saturn and Titan
- Orion1
- · Replies 4 ·
High School Why can't we see Venus at night but at dawn and dusk?
- touqra
- · Replies 1 ·
Beagle 3 and 4 Mars landers planned for 2007
- Nommos Prime (Dogon)
- · Replies 2 ·
Graduate Antimatter and Antigravity Connected ?
- Antonio Lao
- · Replies 34 ·
Graduate Bell correlation between horizons
- Loren Booda
- · Replies 1 ·
Graduate Can a Theory of Everything Exist Without Understanding the State of Nothing?
- JulianHeawood
- · Replies 4 ·
Undergrad WMAP has conclusively proven an expanding universe.
- Chronos
- · Replies 7 ·
Graduate Unraveling the Mysteries of the Accelerating Universe
- Mike2
- · Replies 9 ·
Undergrad Can Infinite Density in Black Holes Imply Infinite Mass?
- taylordnz
- · Replies 28 ·
Graduate Could Misunderstood Gravity Explain Dark Matter?
- billy_boy_999
- · Replies 4 ·
Graduate Proof that there is no missing/dark matter
- Nigel
- · Replies 2 ·
Undergrad Geostationary Orbit: Why Equatorial Plane?
- darkar
- · Replies 2 ·
Is the universe alive and thinking because we are?
- RAD4921
- · Replies 18 ·
Graduate Does rotating our galactic plane 180 degrees reverse gravity's direction?
- north
- · Replies 16 ·
Did we go to the moon?
- Nenad
- · Replies 1 ·
Interactive Orbital Mechanics Simulation with Joystick Control
- check
- · Replies 3 ·
Mike Melvill and Burt Rutan on the Tonight Show
- Dagenais
- · Replies 4 ·
Undergrad How Can I Break Into the Space Industry?
- chroot
- · Replies 1 ·
Graduate Could Gravity Be an Effect of Mass Inertia in an Accelerating Universe?
- Pietro
- · Replies 7 ·
Graduate Can gravitons redshifting as photons travel explain dark energy?
- kurious
- · Replies 31 ·
Graduate What Are the Fundamental Questions About the Big Bang Theory?
- JulianHeawood
- · Replies 11 ·
Graduate Massive Black Hole Stumps Researchers
- Ivan Seeking
- · Replies 10 ·
Graduate The 3-Dimensional/4-Dimensional Hypotheisis Of The Universe
- dperez3894
- · Replies 6 ·
Undergrad Could the age of the universe be older than we thought?
- Rajendra_Vaidya
- · Replies 28 ·
Graduate 9 Space Dimensions 2 Time Dimensions
- woodysooner
- · Replies 7 ·