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 Will wormholes go away (be found to be a quirk of the theory) or. ?
- wolram
- · Replies 5 ·
Graduate Can someone tell me if GP-B has results about GR, one way or the other?
- rbj
- · Replies 5 ·
Undergrad Why doesn't spacetime curvature bend sunlight away from Earth?
- op684
- · Replies 8 ·
High School Can a star drift through intergalactic space?
- Holocene
- · Replies 2 ·
Graduate The Density Parameter and R^3 Space
- KingOrdo
- · Replies 10 ·
Interview Someone on Black Holes
- knivek@nest
- · Replies 1 ·
Graduate Could there be an edge to the Universe?
- KingOrdo
- · Replies 92 ·
Does a Galactic Barrier Exist? Ask Here
- McHeathen
- · Replies 22 ·
Stargazing How to make a telescope using simple steps?
- asvargis
- · Replies 1 ·
Undergrad Which is simpler and easier to imagine?
- marcus
- · Replies 23 ·
High School Distance from low earth orbit to Europa?
- engineer23
- · Replies 1 ·
Graduate Cold spot imprint from another universe?
- cristo
- · Replies 11 ·
Graduate How do hot Jupiters migrate inward if they form where disk gas is sparse?
- zankaon
- · Replies 4 ·
Graduate Do Civilizations Exist Beyond the 20,000 Light-Year Sphere?
- Holocene
- · Replies 1 ·
Undergrad Resources for learning about exoplanet detection and orbital analysis
- FUNKER
- · Replies 1 ·
High School Do the planets revolve on a 2d plane?
- j0nis0n
- · Replies 5 ·
Are There Any Cosmology Documentaries for Adults?
- d43m0n
- · Replies 2 ·
Graduate Galaxies in filaments; a different evolution?
- zankaon
- · Replies 2 ·
Graduate Where did the matter for the Big Bang come from?
- hubertg
- · Replies 5 ·
Stargazing Why isn't the magnification of a telescope (-)
- Rib5
- · Replies 1 ·
Graduate Has observing the universe sealed its fate?
- B. Elliott
- · Replies 17 ·
Graduate Orbital Speed calculation using conservation of Energy
- JayKo
- · Replies 15 ·
Undergrad Is High Speed Space Travel Feasible with the Risk of Space Debris?
- bassplayer142
- · Replies 15 ·
Graduate Multiverse cosmology and observational constraints
- wolram
- · Replies 19 ·
Graduate How does standard theory explain solar wind acceleration?
- Michael Mozina
- · Replies 12 ·
High School Where to Find Information on Algol's Brightness Variation?
- SolarSystHelp
- · Replies 1 ·
Seeing is different than believing
- aman malik
- · Replies 2 ·
High School How to Set Up an Online Observatory?
- damajikninja
- · Replies 1 ·
Graduate Can a human being theoretically become a black hole?
- glowing lights
- · Replies 1 ·
Graduate What happened in the first three seconds after the Big Bang?
- QuantumMechanic
- · Replies 5 ·
Graduate Antimatter Blackhole: What Would Happen?
- IMP
- · Replies 2 ·
High School What Happens to Earth if Sun Becomes a Black Hole?
- linnus
- · Replies 1 ·
Graduate Big Bang theory resources and redshift controversy
- QuantumMechanic
- · Replies 2 ·
Graduate Are there an infinite number of copies of the solar system?
- fmichel04
- · Replies 18 ·
High School What is space, vaccuum, or nonexistence?
- Skhandelwal
- · Replies 79 ·
Graduate Cooperstock and Tieu Respond to Criticisms
- George Jones
- · Replies 7 ·
Undergrad Sunrise on Uranus: How Often at S. Pole?
- ppatter1
- · Replies 19 ·
Graduate Can We Detect or Interact with Alternate Universes with Different Physical Laws?
- adx24001
- · Replies 2 ·
Graduate My blackhole theory-Why is it Wrong?
- rjbig2000
- · Replies 3 ·
Graduate How Do You Calculate Using the MOND Formula?
- christian_dude_27
- · Replies 5 ·
Graduate Solving for Speed of Light Inside a Black Hole
- Kilian
- · Replies 19 ·
High School Could Saturn's rings become satellites one day?
- pixel01
- · Replies 4 ·
High School High school sophomore interested in Astrophysics
- The_Z_Factor
- · Replies 11 ·
Graduate What is the R3 Point in the Earth-Sun Lagrangian System?
- zankaon
- · Replies 3 ·
Graduate Hubble parameter in early universe
- zankaon
- · Replies 18 ·
Graduate What Evidence is Needed to Confirm Dark Energy's Existence?
- Wallace
- · Replies 37 ·
Graduate Looking for a mainstream explanation for gamma gays and nuetron capture signatures.
- Michael Mozina
- · Replies 6 ·
Graduate Detecting Black Hole accretion disc
- zankaon
- · Replies 2 ·
Graduate Bojowald on quantum limits before the Big Bang in Nature Physics
- marcus
- · Replies 29 ·
Graduate Is Super Mario Galaxy Physics Possible in Real Life?
- Coin
- · Replies 4 ·
High School Is the Universe Moving? Acceleration or Stationary?
- RunToFreeForFly
- · Replies 26 ·
Undergrad What is the Astronomical Definition of Eccentricity?
- oscar_lai_hk
- · Replies 3 ·
High School Understanding Orbital Period: Definition, Factors, and Calculation
- oscar_lai_hk
- · Replies 1 ·
Graduate How do black holes form if the Pauli Exclusion Principle seems to prevent it?
- woody3254
- · Replies 6 ·
High School What keeps the atmosphere of a planet in place?
- oscar_lai_hk
- · Replies 2 ·
Undergrad Is the Age of the Universe Linked to the Big Bang Event?
- DARKSYDE
- · Replies 19 ·
Graduate Is Space-Time Finite or Infinite?
- laurence_white
- · Replies 3 ·
Graduate God the Computer; The Universe's Code
- Orann
- · Replies 11 ·
High School Is the sky map for Comet Holmes accurate?
- DaveC426913
- · Replies 16 ·
Undergrad What if the Earth could be moved away from the Sun when it becomes a red giant
- ledopmi
- · Replies 12 ·
Undergrad Is the age formula T=1/H valid for all universe geometries?
- randa177
- · Replies 11 ·
Graduate Spectrum of flux for a synchrontron source
- randa177
- · Replies 1 ·
High School What Are Population I and Population II Stars?
- randa177
- · Replies 3 ·
Graduate Is Gravitational Expansion Consistent with Physical Reality?
- jonmtkisco
- · Replies 1 ·
Undergrad Occultation of star by epsilon ring of Uranus
- marleymang
- · Replies 3 ·
Undergrad Calculate Satellite Height Above Earth's Surface?
- SashaDuma
- · Replies 2 ·
Undergrad How should Earth broadcast signals to announce intelligent life?
- UMich1344
- · Replies 15 ·
Graduate V-I Color Index and Astronomical Catalog
- GleefulNihilism
- · Replies 2 ·
High School Ancient calculations and observations
- scerab
- · Replies 4 ·
Graduate Is a Singularity One-Dimensional?
- physicsx0rz
- · Replies 20 ·
Graduate Does gravity cause expansion at escape velocity?
- jonmtkisco
- · Replies 15 ·
Graduate Gravitational clumping vs space contraction in a closed universe
- jonmtkisco
- · Replies 4 ·
Graduate If observing the universe affects its duration ? (recent Krauss Dent paper)
- marcus
- · Replies 11 ·
Graduate Evidence of Deccelerating Universe Through History
- randa177
- · Replies 9 ·
High School Siberian Impact Crater Found: 1908 Russian Space Blast
- Ivan Seeking
- · Replies 2 ·
Graduate Estimating relative distances for star clusters
- randa177
- · Replies 3 ·
High School If the moon has water ice, why isn't there more discussion of possible lunar life?
- proton
- · Replies 11 ·
Undergrad Neutrinos in Nature: Estimating Numbers
- randa177
- · Replies 5 ·
Undergrad Why doesn't the universe's expansion push Earth away from the Sun?
- newtron
- · Replies 3 ·
Graduate Does Interstellar Extinction Change the Angular Size of Star Clusters?
- randa177
- · Replies 1 ·
Graduate Galaxy brightness and color correlation: what's the equation?
- GleefulNihilism
- · Replies 2 ·
Graduate Friedmann equations and expansion at escape velocity
- jonmtkisco
- · Replies 34 ·
Graduate WMAP tend to coincide with radio emissions from the Milky Way
- jal
- · Replies 2 ·
Stargazing Solid angle acceptance of a muon telescope
- stakhanov
- · Replies 5 ·
Undergrad The MAXIMUM size of the universe
- stevemclaren
- · Replies 2 ·
Graduate Does Gravitational Radiation Exist?
- wolram
- · Replies 13 ·
Graduate Do we know where supermassive black holes come from?
- rubecuber
- · Replies 1 ·
Graduate IEEE considering electrical model of stars
- Skeptik101
- · Replies 2 ·
Graduate Equation for how much an object curves space-time
- rubecuber
- · Replies 3 ·
Graduate Do Black Holes Emit Nuclear Particles Like Electrons and Protons?
- spideyinspace
- · Replies 4 ·
High School How large must an object be to see from Earth with the naked eye or telescope?
- davidschmid10
- · Replies 17 ·
Graduate Critique of Mainstream Cosmology
- Garth
- · Replies 87 ·
Graduate Luminosity-Metallicity Relations in Spiral Galaxies.
- GleefulNihilism
- · Replies 1 ·
Unidentified structure in Clementine lunar image
- ocpaul20
- · Replies 12 ·
Graduate Modified gravity theory as alternative to dark matter
- Ivan Seeking
- · Replies 90 ·
Undergrad Difficulty in understanding a Rocket travelling in space.
- malty
- · Replies 3 ·
Graduate Why don't distant galaxies look clumped together if the early universe was denser?
- Art
- · Replies 6 ·
Graduate Manifold and Metric: Answers to Your Questions
- princeton118
- · Replies 2 ·
Graduate Is there an unambiguous 'Dark Energy' signal in the relevant astronomical data?
- Nereid
- · Replies 11 ·
Graduate Black Holes May Contain Tiny Universe - Nariai Universes
- hammertime
- · Replies 8 ·