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 Accelerated expansion and lightcurves
- TrickyDicky
- · Replies 2 ·
Graduate What is the Origin of the Repelling Force Between Dark Energy and Matter?
- ax3111
- · Replies 23 ·
Graduate Does the uncertainty principle mean that black hole has to become a big bang?
- TCS
- · Replies 3 ·
Graduate Would photons orbit if two black holes annihilate?
- cragar
- · Replies 6 ·
Graduate How Do We Discern Dark Matter from Dark Energy in the Universe?
- paweld
- · Replies 3 ·
Graduate Cosmological Constant: QFT and Existence Explained
- paweld
- · Replies 4 ·
Graduate Euler rotations in galactic plane to change to equatorial
- birdhen
- · Replies 4 ·
Graduate Core Drop: A Simulation for Sealing Oil/Gas Conduits and Beyond
- cph
- · Replies 1 ·
High School Stars from outside the atmosphere
- Pluto*
- · Replies 7 ·
High School What would happen on Earth from a high X-class solar flare?
- libbon
- · Replies 3 ·
Graduate Do merging black holes emit jets like smaller objects falling in?
- brainstorm
- · Replies 8 ·
Astronomy Software - Professional Recommendations
- mreq
- · Replies 31 ·
Graduate Can a nuclear chain reaction power constant acceleration in space?
- wllsrvive
- · Replies 12 ·
Undergrad Can Black Holes Break the Rules of Time?
- @$@D
- · Replies 10 ·
Graduate Universe expanded faster than the speed of light during inflation
- travwg33
- · Replies 1 ·
Undergrad Actual year/day vs earth's movement
- Good4you
- · Replies 1 ·
Graduate Can we tell apart antimatter from matter?
- technobot
- · Replies 3 ·
Undergrad Questions Regarding an Alternate Planet
- Northodontist
- · Replies 4 ·
Undergrad What Is the Difference Between Dark Matter and Dark Energy?
- libbon
- · Replies 2 ·
Graduate Modeling Universes: Can We Predict Theoretical Universes?
- alvarogz
- · Replies 3 ·
Graduate Black Holes and Variable Infinities
- arrow564
- · Replies 2 ·
High School What type of athmosphere would a planet with red and pink trees have
- tyquniaum
- · Replies 12 ·
High School Could Harvesting Materials from the Solar System Affect Earth's Orbit?
- Pattonias
- · Replies 7 ·
Undergrad Could a planet ever be split into two halves?
- Akemi2
- · Replies 36 ·
High School Geosynchronous vs geo-stable orbit?
- jnorman
- · Replies 2 ·
Graduate Could Jupiter Be Ignited for Fusion?
- Simon666
- · Replies 31 ·
High School When do neutron stars, supernovas, and pulsars form during a star's life?
- utkarsh009
- · Replies 4 ·
Undergrad What causes Sedna's extremely long orbital period?
- aishwaryaj
- · Replies 6 ·
Undergrad How do space stations and satellites survive micrometeorite impacts?
- wllsrvive
- · Replies 6 ·
Graduate Does Gravity Wave Travel Faster Than Light Wave Near a Black Hole?
- seto6
- · Replies 8 ·
Graduate Converting ICRS coordinates to ECI for orbital simulation
- kmg5246
- · Replies 9 ·
Graduate Some thoughts concerning backgroun radiation
- espen180
- · Replies 6 ·
Stargazing About the wave nature theory In the case of Lunar Eclipse
- El-Korek
- · Replies 2 ·
Graduate Could the CMBR come from multiple sources rather than one?
- Nile3
- · Replies 21 ·
Graduate Blackbody Prediction for CMBR: Alpher, Herman, and Gamow's 1948 Theory
- TrickyDicky
- · Replies 3 ·
Undergrad What is the best scientific method to deep space travel
- tpribb01
- · Replies 37 ·
Stargazing Strange figure in hallway: scientific explanations
- iogi
- · Replies 1 ·
High School Can You Outrace the Sun? Debating the Possibility and Necessary Speed in MPH
- Matloc890
- · Replies 6 ·
Graduate Solar spectral irradiance at earth's TOA
- everetthitch
- · Replies 2 ·
Graduate Is MC22 a Neutron Star or a Black Hole?
- col1973
- · Replies 2 ·
Undergrad Shockwaves and thermal energy created by a dying star
- Dropabomb
- · Replies 5 ·
Graduate Black Hole Binding Energy Radiation
- valjok
- · Replies 5 ·
Graduate How Much Starlight is in the Galaxy and Can it Power Advanced Civilizations?
- qraal
- · Replies 15 ·
Graduate Is the Last Scattering Surface Finite or Infinite?
- vizart
- · Replies 17 ·
Graduate Is Free Will Possible in a Deterministic Universe?
- mihaiv
- · Replies 183 ·
Graduate Estimating Exoplanet Temperatures
- piareround
- · Replies 4 ·
Graduate Is Dark Matter and Dark Energy Present on Earth?
- BruceNakagawa
- · Replies 5 ·
Undergrad Eternal universe vs finite life of stars
- Thecla
- · Replies 2 ·
Undergrad What does light emitted by quasar convey?
- utkarsh009
- · Replies 1 ·
Graduate Why Are Black Holes Considered Singularities Despite Neutrino Emission?
- 2keyla
- · Replies 4 ·
Graduate Would a specific change in earth's rate of precession mean no seasons?
- DocZaius
- · Replies 5 ·
Graduate Disappearing Sunspots, Minus 50 Gauss/yr
- Saul
- · Replies 3 ·
Graduate What are the mechanism implications of MECO?
- Saul
- · Replies 7 ·
Undergrad Why Do Vectors Cause Issues in My Orbital Simulation?
- exclamaforte
- · Replies 5 ·
Graduate What Happens to Gravity in a Collapsing Universe?
- frodeborli
- · Replies 10 ·
Graduate Is photon energy conserved for comoving observers in redshifted light?
- TrickyDicky
- · Replies 15 ·
Bright object in the night sky, possibly Venus
- Jake4
- · Replies 6 ·
Undergrad Calculating distance using absolute and apparent visual magnitudes
- Bugsy23
- · Replies 1 ·
Graduate Could stars form from ejected black hole matter?
- Merode
- · Replies 15 ·
Graduate Question regarding pre-bigbang detection.
- moniz
- · Replies 3 ·
Graduate Does dark energy contradict Hubble's observations of galaxy recession?
- discord73
- · Replies 5 ·
Graduate A Giant Hole in space Well, I'll be a
- rhody
- · Replies 8 ·
Undergrad How fast do pulsar beam particles travel and what happens when beams collide?
- discord73
- · Replies 2 ·
Graduate Find radial velocity of star from orbiting body
- luma
- · Replies 2 ·
Undergrad Where are the starting points for measuring celestial coordinates?
- Philosophaie
- · Replies 1 ·
Undergrad Why did hydrogen and helium concentrate at the center of the solar system?
- Zander46
- · Replies 22 ·
Undergrad What is the relationship between temperature and redshift?
- kuahji
- · Replies 4 ·
Undergrad Launch loop design and feasibility for reaching LEO
- I3VI5
- · Replies 5 ·
Undergrad RMC speed value in NMEA GPS data: ground reference and accuracy
- Roughmar
- · Replies 3 ·
Graduate Can black holes absorb gravity waves?
- brainstorm
- · Replies 2 ·
Graduate Orbital transfers and escape velocity: relationship
- brainstorm
- · Replies 2 ·
Undergrad Reaching Alpha Centauri in human lifetime
- JamesCallahan
- · Replies 21 ·
Graduate Why do we think the entire universe is expanding?
- K Rool
- · Replies 8 ·
Graduate Can a Big Crunch Happen in an Open Universe?
- JC380
- · Replies 1 ·
Graduate Finding a Natural Frame of Reference on the Cosmic Scale
- TheDonk
- · Replies 1 ·
Graduate Distances contract as a result of motion?
- Desrib49
- · Replies 1 ·
Undergrad Can Absolute Velocity be Measured with Cosmic Background Radiation?
- CosmicVoyager
- · Replies 6 ·
Graduate Solving Kepler's Problem: Awkward Integration
- Piano man
- · Replies 3 ·
Graduate Is Dark Matter Really Just Dark Gravity?
- IceMan815
- · Replies 21 ·
Graduate Is There An Age Problem In The Early LCDM Model?
- Garth
- · Replies 5 ·
Graduate Understanding White Dwarf Temperature
- piareround
- · Replies 2 ·
Stargazing Beginner binoculars recommendation for high school astronomy
- brother time
- · Replies 3 ·
Graduate Collapsing and expanding shell theorem
- frodeborli
- · Replies 18 ·
Graduate Titan - Exposed to large amounts of Oxygen
- skycastlefish
- · Replies 3 ·
High School Colored ring around the moon in misty mountains
- opsb
- · Replies 7 ·
Graduate Gravitational motion transitions into universal expansion over distance
- Mechanic
- · Replies 3 ·
Undergrad Understanding Motion in Space Calculations
- Scott S
- · Replies 2 ·
Graduate 3 Planets converging on Leo Constellation
- Philosophaie
- · Replies 3 ·
Graduate How Do Black Holes Influence Time and Matter in Our Universe?
- ckaiser
- · Replies 11 ·
Undergrad Solar declination / solar panel array design
- blimkie.k
- · Replies 2 ·
Stargazing Need advice on telescope for astrophotography
- cronxeh
- · Replies 9 ·
Graduate Why can't we see past the surface of last scattering?
- Jocko Homo
- · Replies 7 ·
Undergrad Do countries claim territorial rights to the space directly above them?
- AsaRand
- · Replies 8 ·
High School The universe is expanding. Into what ?
- Nick666
- · Replies 1 ·
Graduate Magnitude vs Redshift Supernova 1a
- wikiwert
- · Replies 2 ·
Graduate Does time actually speed up near a black hole's event horizon?
- iRaid
- · Replies 14 ·
High School When does the Sun sets down at 71°11'
- Borek
- · Replies 2 ·
Graduate Is the Conventional Wisdom About the Universe Wrong?
- wolram
- · Replies 31 ·
Undergrad How is it that the sun affects our tides?
- itsthemac
- · Replies 5 ·
Graduate Spiral and Disk Galaxies are controlled by single parameter. What and How?
- Saul
- · Replies 28 ·