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 Light that is directed towards the center of a black hole
- jaydnul
- · Replies 10 ·
Graduate Is space plasma the key to understanding dark matter?
- Reid Knapp
- · Replies 4 ·
Graduate Is Space Fabric Real or Just a Theoretical Construct?
- MathJakob
- · Replies 30 ·
Graduate What Are Stephen Hawking's Greatest Contributions?
- shounakbhatta
- · Replies 1 ·
High School Expanding Universe: Is Space Like a Balloon?
- us40
- · Replies 4 ·
Graduate After Big Bang: Are There Different Universe Building Blocks?
- Jobrag
- · Replies 1 ·
Graduate What is the Composition of an Exoplanet 50 Light Years Away?
- willstaruss22
- · Replies 8 ·
Undergrad What else do we know about dark matter?
- ryanuser
- · Replies 7 ·
High School What is the Speed of the Lunar Terminator?
- Numeriprimi
- · Replies 8 ·
Messier 45: Image from Oct 6th/2013
- spark802
- · Replies 8 ·
Graduate Gamma ray bursts (GRB's) and the Ordovician Mass Extinction
- jim mcnamara
- · Replies 12 ·
Undergrad Dark matter comprises over 80% of the universe
- Ameretsu
- · Replies 12 ·
Graduate Info on tests done in the past for expanding universe
- scott22
- · Replies 3 ·
High School How do clocks keep up with time?
- cowls192
- · Replies 15 ·
High School Compare weights at equator and poles?
- cbere2013
- · Replies 2 ·
High School Shape of Universe: What is Its Form?
- shivakumar06
- · Replies 2 ·
Graduate Explaining the Big Bang Theory for Dummies
- Just Wondering
- · Replies 27 ·
Graduate Photon pressure from energy density
- emz
- · Replies 5 ·
Undergrad Sunspot plotting and angular velocity
- ExoP
- · Replies 7 ·
Graduate What Lies Beyond the Observable Cosmos?
- jamescopple
- · Replies 2 ·
Graduate How does rainbow gravity reshape our understanding of inflation?
- wolram
- · Replies 1 ·
Graduate Is Dark Flow Evidence of Other Universes According to Planck Data?
- keepit
- · Replies 2 ·
Undergrad Calculating the Distance and Parallax of a Star: A Practical Guide
- fatima_a
- · Replies 3 ·
Graduate What happens to gravity in one dimension of space?
- KeplerJunior
- · Replies 6 ·
Graduate Centrifuge and Radial Bouyancy in space
- Albertgauss
- · Replies 6 ·
Undergrad Connection between right ascension and time
- Wheelwalker
- · Replies 3 ·
Graduate Physics & Cosmology: Dimensionless Void Pre Big Bang
- Rosen
- · Replies 7 ·
Graduate Can Matter Be Transferred Between Universes?
- shivakumar06
- · Replies 4 ·
Graduate Suppose gravitons do leak into Calabai Yau spaces
- keepit
- · Replies 13 ·
Undergrad Can Extra Dimensions Solve the Central Singularity of Black Holes?
- jaydnul
- · Replies 12 ·
Undergrad What is a gravitational sling-shot?
- rogerk8
- · Replies 11 ·
Graduate FRW Universe with Equation of State: Examining Singularity at Big Bang
- johne1618
- · Replies 2 ·
Graduate Two kinds of flatness? cosmological constant?
- Khashishi
- · Replies 7 ·
Graduate How to calculate when an object will be directly
- Wheelwalker
- · Replies 4 ·
Graduate The linearization of the metric of curved space-time
- maica
- · Replies 6 ·
Graduate Why is this theory simply ignored?
- MathJakob
- · Replies 1 ·
Undergrad How do atoms move through space?
- jovenstef
- · Replies 4 ·
Graduate What Do Canonical Quantum Gravity Models Tell Us About the Big Bang?
- skydivephil
- · Replies 2 ·
High School Is black hole a theoretical concept or a natural phenomenon?
- Phy_enthusiast
- · Replies 17 ·
Graduate Universe is infinite-no beginning and no end
- pullmanwa
- · Replies 3 ·
Undergrad Values of Right Ascension which are best for an observer
- ecastro
- · Replies 1 ·
Graduate Problem understanding how universe is infinitely flat
- nikolakis
- · Replies 10 ·
Graduate Predicting the Radius of the Sun as a Red Giant with SSM
- 1239
- · Replies 4 ·
Graduate Is Euclidean space an affine space?
- BruceW
- · Replies 0 ·
Graduate Are galaxies net importers or exporters of mass/energy?
- UltrafastPED
- · Replies 1 ·
Undergrad How has CMB research affected modern technology
- lightningmil
- · Replies 2 ·
Graduate Temperature & Survival at Big Crunch
- saurabhjain
- · Replies 1 ·
Graduate Is the Observable Universe Flat Despite Gravitational Warping?
- keepit
- · Replies 11 ·
Undergrad Fate of Galaxies: Will Stars be Pulled into Black Holes?
- pforeman
- · Replies 2 ·
Graduate Accelerating, Expanding Universe Questions from a Novice
- yonglin426
- · Replies 4 ·
Graduate Consumption of a galaxy by its central black hole
- Televisionary
- · Replies 3 ·
Graduate A small black hole goes thru a toroidal hole.
- negativzero
- · Replies 34 ·
Graduate Effects of super massive blackhole on galactic movement
- gusmuf
- · Replies 9 ·
Graduate What is space in contrast to void?
- goldust
- · Replies 7 ·
High School Evidence of water found in Martian soil
- MathJakob
- · Replies 11 ·
Undergrad Asteroid Impacting Venus: Will it Strike or Explode?
- willstaruss22
- · Replies 1 ·
Graduate Time & Gravity: How Much Slower on Earth?
- seb7
- · Replies 7 ·
High School Why does Earth have an axial tilt
- shifty88
- · Replies 22 ·
Graduate Can the shape of the universe be inferred from the CMBR?
- goldust
- · Replies 6 ·
Graduate Earliest Photons: Quark Era & Neutrino Decoupling
- mrcotton
- · Replies 5 ·
High School Explaining Gravity: A Simple Question Answered for Kids by an Expert Astronomer
- cookant
- · Replies 6 ·
Graduate Is the microwave background radiation still decreasing?
- goldust
- · Replies 13 ·
Graduate War, space, and the evolution of Old World complex societies
- jim mcnamara
- · Replies 1 ·
High School Is the Sun Really White? Investigating a Crackpot Theory
- killocan
- · Replies 11 ·
Undergrad Is the inner core of earth affected by the moon?
- DirectChange
- · Replies 2 ·
Graduate Gravitational waves analogous to photons and EM radiation?
- keepit
- · Replies 6 ·
Undergrad How can I use the Newton Method to find the eccentric anomaly for Mars?
- smmSTV
- · Replies 1 ·
Graduate Rewinding a black hole - Can a spinning black hole become a star?
- Umbra
- · Replies 1 ·
Graduate How Does Lower Moon Mass Affect Its Orbit Distance from Earth?
- paulcretu
- · Replies 9 ·
Discovering the First Binary Star System: The Fascinating Binary System Story
- Phy_enthusiast
- · Replies 20 ·
Graduate What about 2nd law of thermodynamics in Cyclic Universe Model?
- jarekd
- · Replies 3 ·
Graduate How Much Mass Energy Does a Black Hole Re-Radiate?
- Islam Hassan
- · Replies 10 ·
Graduate Traveling to other universes in an infinite multiverse
- Jared409
- · Replies 7 ·
Graduate Turn a sinusoid into a elliptic orbit
- Philosophaie
- · Replies 7 ·
Graduate Quantization of Gravity: Testing with CMBR Polarization | Krauss, Wilczek
- wolram
- · Replies 1 ·
High School Do 'Space Rainbows' Exist Outside of Planetary Atmospheres?
- BrowncoatsRule
- · Replies 4 ·
Graduate Find Perifocal in Kepler: Reconcile Answers from x0, y0, z0, vx0, vy0 & vz0
- Philosophaie
- · Replies 1 ·
Graduate Galileon Cosmology Explained: Summary & Overview
- skydivephil
- · Replies 2 ·
Graduate Could Dark Energy be a form of Dark Matter
- rp1220
- · Replies 9 ·
Graduate Nature of radiation on interplanetary space exploration
- wally_moot
- · Replies 7 ·
Undergrad Could Evil Parallel Universes Really Exist?
- jaykay000
- · Replies 4 ·
High School Is It Possible to Explore Comets with Today's Technology?
- EskWIRED
- · Replies 1 ·
Graduate Planetary habitability in proximity to nebulae
- TheDarkFrontie
- · Replies 4 ·
Undergrad Optimal Distance for Collision-Free Earth Orbit
- keepit
- · Replies 5 ·
Voyager: at edge of our solar system
- Naty1
- · Replies 30 ·
Graduate Goodbye Big Bang, hello black hole?
- marcus
- · Replies 8 ·
High School Microscopic Alien life found on British Balloon?
- wasteofo2
- · Replies 6 ·
Graduate Einstein field equations and scale invariance
- johne1618
- · Replies 10 ·
Graduate Is there a chronology in the multiverse?
- JC_CAN
- · Replies 5 ·
Graduate Is energy conserved in the expanding universe?
- ilikescience94
- · Replies 1 ·
Graduate Could Space Be an Energy Conversion Rather Than a Result of the Big Bang?
- Igottaknow
- · Replies 6 ·
Graduate Travel through different vacuum phase
- scasca
- · Replies 1 ·
Undergrad Star is expected to be torn apart in the center of our Galaxy
- Dmitry67
- · Replies 2 ·
Graduate Is the Universe Expanding into Nothing or Something?
- georgiagrace
- · Replies 8 ·
Graduate Is the expansion of the universe relative to our clocks and rulers?
- JackMartinelli
- · Replies 20 ·
Undergrad The Big Bang: Light Before Matter?
- taylor__hasty
- · Replies 3 ·
Graduate Orbital period of eclipsing binaries
- Sastronaut
- · Replies 5 ·
Graduate Question about pre-CMB & Lepton Number
- billyalex2
- · Replies 1 ·
Stargazing What Type of Brass Telescope Do I Have?
- Ricky Williams
- · Replies 4 ·
Graduate Energy and mass, equal in amount in the universe?
- goldust
- · Replies 2 ·