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
Undergrad Is there any cosmological research field concerning signal processing?
- uglybachelor
- · Replies 3 ·
Graduate The theory of Cosmological Relativity by Dr. Moshe Carmeli.
- kuartus4
- · Replies 7 ·
Undergrad Is Dark Flow Considered a Fringe Theory?
- Chaos' lil bro Order
- · Replies 4 ·
Graduate Finding the Optimal Time to Launch a Mission to Mars
- xaz
- · Replies 1 ·
Undergrad How does one descibe a co-orbiting system?
- Lino
- · Replies 2 ·
Graduate An Infinite Time's Arrow is Impossible and Incompatible with Scientific Theory
- james.goetz
- · Replies 58 ·
Graduate Will Neutron Stars Last Forever Without Proton Decay?
- Dremmer
- · Replies 9 ·
Undergrad Why are black holes shaped like hurricanes?
- daveandjack
- · Replies 20 ·
Graduate What if Neutron Stars Collide: Matter, Mass & Metal
- drakken1985
- · Replies 7 ·
Graduate Nature and The Universe, How can Nature being conscious, know what it is doing ?
- SBC
- · Replies 2 ·
Graduate Frustrated Over Tonight's Morgan Freeman Show
- BadBrain
- · Replies 15 ·
Graduate Relativistic Jets from Supermassive Black Holes?
- Islam Hassan
- · Replies 13 ·
Undergrad Are Black Holes Really Black and Just Holes?
- Dremmer
- · Replies 16 ·
Graduate Difference between outbursts and flares in X-ray accreting binaries
- RHK
- · Replies 1 ·
Graduate How do we know there is a timespace fabric?
- Vierstein
- · Replies 1 ·
Graduate Discovering the Shape of Spacetime from the Big Bang: A Scientific Exploration
- AlbertE
- · Replies 142 ·
Graduate Object Approaching Black Hole: Time Dilation & Visibility
- FOIWATER
- · Replies 4 ·
Graduate A could be explenation for the universe but probably not.
- AustinJones
- · Replies 15 ·
Graduate Infinite universe and big bang singularity
- kuartus4
- · Replies 26 ·
Graduate Gravitational waves and others contradictoriness
- Dinar
- · Replies 9 ·
Graduate Is the Milne model compatible with Einstein's field equation?
- andrewkirk
- · Replies 11 ·
Undergrad First post a question about Black Holes and Gravity
- Rossi_UK
- · Replies 37 ·
Undergrad Acceleration due to gravity in a galaxy?
- Bjarne
- · Replies 5 ·
Graduate Just wondering what the latest descriptions of space were.
- bill alsept
- · Replies 8 ·
Graduate How Fast Do Stars Orbit in Different Galaxies?
- Bjarne
- · Replies 2 ·
Undergrad Active Volcano in Venus: Unveiling the Mystery
- Mehrdad1
- · Replies 8 ·
Why Does My DSI Pro II Show a Black or Grey Screen?
- Chronos
- · Replies 10 ·
High School For Just How Long Has the Periodicity of Halley's Comet Been Known?
- BadBrain
- · Replies 2 ·
Graduate Neutron Star Stability: Does Proton Crust Matter?
- iced199
- · Replies 31 ·
Undergrad With the laws of physics you can get Universes?
- jackmell
- · Replies 21 ·
What Is The Sky - Gazing Into Space?
- moatasim23
- · Replies 3 ·
Graduate How Does Dark Matter Influence Gravity in Galaxies?
- keepitmoving
- · Replies 3 ·
High School Has There Been a Recent Supernova in Andromeda?
- Thecla
- · Replies 4 ·
Undergrad Matter, energy, space, time and gravity
- Dremmer
- · Replies 4 ·
Graduate Could every possible universe exist somewhere ?
- IngemarAEH
- · Replies 16 ·
List of Astronomical Associations / Astrologist in USA
- exchanger107
- · Replies 1 ·
Who Decides Humanity's Space Destinations and Why?
- sigurdW
- · Replies 9 ·
Graduate Why is the Hubble sphere expanding?
- andrewkirk
- · Replies 16 ·
Undergrad Universe Expansion = Drop in Gravity ?
- blackskynet
- · Replies 6 ·
High School Comet near the sun whose orbit is?
- dolphinsny
- · Replies 7 ·
Undergrad What Powers a Supernova Explosion?
- Xcellerator
- · Replies 2 ·
High School What happens to an empty can in space?
- bigdog7696
- · Replies 4 ·
Undergrad How big and bright is the Sun seen from 120 AU?
- beginner49
- · Replies 5 ·
Graduate Solar sailing Mercury into Venus
- Mou_Laurin
- · Replies 7 ·
Graduate Black Hole - Dark Energy and Matter Question
- Eddyb1
- · Replies 7 ·
Graduate How much hydrogen has been consumed?
- iced199
- · Replies 15 ·
Graduate Traveling to Alfa Centauri at 1/2 the speed of light
- McCartney
- · Replies 40 ·
Graduate How do we know that 74% of the universe is dark energy?
- iced199
- · Replies 5 ·
Graduate Quantum Confusion - Does not exist until it's observed and age of universe
- sshai45
- · Replies 3 ·
Graduate Constraints, Concept , Kant & Space
- John Creighto
- · Replies 6 ·
Graduate Redshift Time and the Start of the Solar System
- John15
- · Replies 3 ·
Stargazing Viewing night sky in the middle of a major city
- BadBrain
- · Replies 4 ·
Graduate Can Time Exist Before the Big Bang?
- blackskynet
- · Replies 2 ·
Undergrad Should the Astronomical Unit be replaced by the Light Second/Light Minute Etc.?
- BadBrain
- · Replies 23 ·
High School Does Space Need to Be Filled for Distance to Exist Between Two Objects?
- nick1o2
- · Replies 3 ·
High School Need Help Understanding Expanding Universe
- courtney1111
- · Replies 37 ·
Undergrad Astro Physics Research for Undergrads
- kptsilva
- · Replies 15 ·
Undergrad The First Three Minutes - Steven Weinberg
- s_sayed
- · Replies 24 ·
Graduate Relationship between dark energy and the strong force
- silent bob
- · Replies 10 ·
Graduate Mirror neutrons all over the science news
- skydivephil
- · Replies 20 ·
Undergrad Can quasar gets converted into pulsar?
- Mehrdad1
- · Replies 4 ·
Graduate What value is expected for baryon to photon density?
- arroy_0205
- · Replies 1 ·
Graduate How Is Satellite Orbit Speed Calculated with Atmospheric Resistance?
- Bjarne
- · Replies 3 ·
Graduate Images of the Universe: Lasting Through Time
- Frank Stepien
- · Replies 15 ·
Graduate Size of universe and quantity of mass
- kuartus4
- · Replies 1 ·
Undergrad 10^80 particles in observable v unobservable universe
- robertjford80
- · Replies 45 ·
Graduate Mission to Probe the Universe's Darkest Secrets
- skydivephil
- · Replies 5 ·
Graduate Is the inverse-square law valid for all cosmological distances?
- StateOfTheEqn
- · Replies 34 ·
Stargazing James Webb Telescope capability ?
- blackskynet
- · Replies 1 ·
Graduate Planetary Axis Stability: Examining the Role of Moons and Other Factors
- iced199
- · Replies 2 ·
Graduate Collision course trajectory / velocity
- CarlosMarti12
- · Replies 1 ·
Undergrad G-Forces in Space and the Human Body
- jonc151
- · Replies 8 ·
Undergrad Relation between the sol, mass, gravity, and black holes
- Jeaaas
- · Replies 1 ·
Undergrad Heliosphere's Long-theorized Bow Shock Does Not Exist
- chemisttree
- · Replies 7 ·
Graduate Carried along by the Hubble flow.
- yuiop
- · Replies 37 ·
Graduate Need specific Hubble images. Archive does not have them.
- Peb63
- · Replies 2 ·
Undergrad Position of the Sun and Moon in ECEF coordinates
- Trolll
- · Replies 3 ·
Graduate Tugs from Beyond the Observable Universe
- blackskynet
- · Replies 2 ·
Undergrad Can gravity increase on its own?
- schiz0ai
- · Replies 7 ·
Graduate How are measurements done in the Doppler Orbitography Radiopositioning
- Ankit C
- · Replies 1 ·
Graduate Is the Universe Infinite or Just Expanding?
- calios
- · Replies 3 ·
Graduate How does the graph of V(φ) support the concept of slow-roll inflation?
- robertjford80
- · Replies 3 ·
Graduate Series of GR questions about universe expansion
- lobro2002
- · Replies 2 ·
Graduate Are black holes the great organizers of the universe?
- Antioch
- · Replies 5 ·
Graduate Spacetime for an anti-black hole?
- MadViolinist
- · Replies 3 ·
Graduate Is the Universe Leaking Energy? Tamara M. Davis
- Naty1
- · Replies 24 ·
Undergrad Gravitation - Why don't planets smash into each other?
- physio
- · Replies 3 ·
Undergrad Mysterious Night Sky Object - Help?
- NeuronsAtWork
- · Replies 15 ·
Graduate Question about supernova kinetic energy
- lr1
- · Replies 3 ·
Graduate Dim Stars: Are There Almost-Black Holes in the Universe?
- mrspeedybob
- · Replies 19 ·
Graduate What causes angular momentum in rotating bodies
- John15
- · Replies 16 ·
Graduate Is the multiverse cosmology or metaphysics?
- Ken G
- · Replies 43 ·
Graduate Assumption that Anti-Matter Galaxies Would Emit Detectable Gamma Ray Bursts
- Cadaei
- · Replies 7 ·
Graduate Is it possible that antimatter would exert antigravity on matter?
- StevenJParkes
- · Replies 6 ·
Graduate Does Dark Matter Gather Near Black Holes and Suns?
- Some Slacker
- · Replies 4 ·
Undergrad Question About Light From the Big Bang
- Jorge G.
- · Replies 2 ·
Is it possible that Our universe could be a tiny spec in a say, sandbox?
- Minchken
- · Replies 5 ·
Graduate What Does t→0 Mean in Neutron Freeze-Out?
- AuraCrystal
- · Replies 2 ·
Graduate Would Jupiter steal matter from our Sun when it reach red giant phase?
- Czcibor
- · Replies 4 ·
Graduate What Causes Stellar Expansion During Hydrogen Fusion?
- ehabmozart
- · Replies 4 ·