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 Will Uranus Ever Be Tidal-Locked to the Sun?
- pixel01
- · Replies 3 ·
Graduate Pioneer 10 and 11 anomylous acceleration
- Chaos' lil bro Order
- · Replies 16 ·
Undergrad Why doesn't hydrogen in Jupiter's atmosphere ignite?
- fluidistic
- · Replies 5 ·
Graduate Why do voids exist if clustering doesn't form until z < 2?
- hellfire
- · Replies 8 ·
High School Should we Makemake anything about the name?
- Ai52487963
- · Replies 5 ·
Graduate Merger of Neutron Stars and Black Holes
- FNL
- · Replies 2 ·
Graduate Most Distant Galaxy: Mysteries Explained
- yuiop
- · Replies 6 ·
Graduate How Does Quark-Gluon Plasma Influence Big-Bang Nucleosynthesis?
- jal
- · Replies 4 ·
Graduate Why the excess of young stars close to Milky's supermassive BH?
- marcus
- · Replies 1 ·
Binary Star System Data - Get Answers Here!
- glueball8
- · Replies 2 ·
Graduate The Blackhole Paradox: Can EM Radiation Escape?
- protonic_mass
- · Replies 3 ·
Undergrad What does the theory of the big bang say about this
- Mozart
- · Replies 3 ·
Graduate Our Local Group's Microwave Background Radiation dipole
- zankaon
- · Replies 5 ·
Stargazing 6 inch vs 8 inch Dobsonian for galaxy and nebula viewing
- Sheneron
- · Replies 14 ·
Graduate Is dark energy really responsible for the expansion of the universe?
- wolram
- · Replies 1 ·
Graduate Entropy & Cosmology: Arrow of Time Paradox
- yuiop
- · Replies 11 ·
Graduate What Is an Unambiguous Standard for Pulsar Periods?
- nicksauce
- · Replies 3 ·
Graduate Is spacetime a thing that can curve or just relations between objects?
- madness
- · Replies 72 ·
Graduate How does the light from distant galaxies support the theory of the Big Bang?
- GTrax
- · Replies 3 ·
Graduate Does a finite universe make sense to you?
- epkid08
- · Replies 151 ·
High School Why is a space probe spinning around its own axes, when flying through space?
- Bjarne
- · Replies 6 ·
Graduate What does CMB data directly tell us about the universe's age and size?
- mysearch
- · Replies 19 ·
Graduate Could it be possible that gravity is the reason why the universe is expanding?
- brianthewhitie7
- · Replies 6 ·
Stargazing Building a telescope from a Coronado H-alpha solar scope
- vincentm
- · Replies 2 ·
Is black hole a racially insensitive term?
- freerangequark
- · Replies 79 ·
High School Energy carried by the bulk motion of matter
- Katt
- · Replies 2 ·
Undergrad Does the Earth-Moon barycentre move in two different cycles?
- natski
- · Replies 2 ·
Undergrad Expanding universe expanding atoms
- Adrian Baker
- · Replies 19 ·
Undergrad At what altitude and velocity is an orbit geosynchronous?
- Loren Booda
- · Replies 11 ·
Graduate Does the Planck length grow with the scale factor?
- robheus
- · Replies 5 ·
Graduate Terminology: Omega_0 = Omega_m? and more
- hAndrew
- · Replies 1 ·
Undergrad Why Do Objects in Space Spiral Around Larger Masses?
- nuby
- · Replies 11 ·
High School Why Does Thrust Differ for Objects of Different Mass in Space?
- DarkElfa
- · Replies 3 ·
Undergrad Observational anomalies in Earth orbit besides pioneer anomaly
- adastra
- · Replies 12 ·
Undergrad Can we see galaxies receding faster than light?
- Sorry!
- · Replies 13 ·
Graduate How to measure the tangential component of velocity of receding starsor quasars?
- aniketp
- · Replies 2 ·
Graduate Red - blue shifts and stellar rotation
- Libmr2bs
- · Replies 8 ·
Graduate Topology Q: Curved Space w/out Higher Dimensions?
- Pavel
- · Replies 5 ·
Graduate Beginning of space, time, matter, energy
- PhysicsDilettante
- · Replies 5 ·
Graduate Is the universe a recycling bin? (Entropy)
- Flux
- · Replies 22 ·
Undergrad Is IK Pegasi (HR 8210) dangerous to us at all?
- izzywizzy
- · Replies 4 ·
Graduate Is the Universe's Expansion Slowing Down or Speeding Up?
- Holocene
- · Replies 6 ·
High School How do astronomers know about distant galaxies and stars we can't see?
- Dumbmum
- · Replies 4 ·
Undergrad Why most extrasolar planet names start with HD
- adastra
- · Replies 2 ·
Graduate Determining the Argument of the Perihelion of the Earth: Which Value is Correct?
- Philosophaie
- · Replies 2 ·
Undergrad Are they moving faster than light?
- Desiree
- · Replies 3 ·
Undergrad A Layman's Question of the Big Bang
- sgitlin
- · Replies 9 ·
Graduate The Time Evolution of an Infinite 3D Grid of Mass Particles
- jonmtkisco
- · Replies 28 ·
Graduate Could the Big Bang Theory Be Incorrect?
- Relena
- · Replies 7 ·
Graduate Where did the singularity come from before the Big Bang?
- Jordan Joab
- · Replies 25 ·
Graduate Deriving the Chandrasekhar Limit on a Napkin
- FunkyDwarf
- · Replies 9 ·
Graduate Beyond Big Bang gets a bit more visible
- marcus
- · Replies 17 ·
High School Why do the Sun and Moon appear larger at the horizon?
- orangepeel
- · Replies 4 ·
Graduate Astronomical influence on climate
- giann_tee
- · Replies 6 ·
Undergrad Does spacetime curvature cause expansion in the balloon universe model?
- zwest135
- · Replies 1 ·
Undergrad Absorb all sort of matter and radiations and still not releasing out?
- GAGS
- · Replies 13 ·
Water Found on Mars: Now to Melt It
- sanman
- · Replies 54 ·
Graduate Could matter condensation explain cosmic expansion?
- Rafterman1
- · Replies 36 ·
Graduate Does the Capernican Principle Apply to Pre-Big Bang Models?
- zankaon
- · Replies 20 ·
Graduate Does the universe have infinite mass?
- yuiop
- · Replies 17 ·
Graduate What will happen when the CMB will raise the zero?
- Ignition
- · Replies 4 ·
Graduate Finding eccentric anomaly faster than Newton's method
- NoobixCube
- · Replies 19 ·
Is it possible to get someone's Myspace email?
- php111
- · Replies 1 ·
Graduate Atmospheric Gamma Ray Interactions
- chrispy
- · Replies 2 ·
Graduate Do Cosmological Tidal Forces Prove the Expansion of Space?
- jonmtkisco
- · Replies 9 ·
Undergrad Giant Asteroid Flattened Half of Mars, Studies Suggest
- LowlyPion
- · Replies 2 ·
High School Why is Martian ice water ice rather than dry ice?
- lwymarie
- · Replies 26 ·
Graduate Would Procyon and Capella systems undergo Type Ia supernovae?
- izzywizzy
- · Replies 3 ·
Undergrad Perihelion Pass Dates for Planets - Alex's JS Orrery
- twinsen
- · Replies 5 ·
Graduate How can a wave fragment have frequency?
- wolram
- · Replies 1 ·
What are your thoughts about the Large Hadron Collider?
- tkitchen
- · Replies 2 ·
Undergrad Cosmic Microwave Background and Its Temperature
- quantumkiko
- · Replies 18 ·
Graduate Understanding Hubble's Law: Calculating Recession Velocity and Hubble's Constant
- thenewmans
- · Replies 3 ·
Mars - this is how it went down. (just for fun/argument sake)
- offtheleft
- · Replies 11 ·
Graduate Kustaanheimo-Stiefel transformation ?
- astronomia84
- · Replies 2 ·
Graduate Proof That the Universe is Electrically Neutral
- Moneer81
- · Replies 41 ·
Graduate Twins stars born at different time
- lwymarie
- · Replies 1 ·
Mars Soil Has Nutrients Capable of Supporting Life
- sanman
- · Replies 19 ·
High School Are All Planets Rotating in the Same Direction, Except Venus and Uranus?
- Philosophaie
- · Replies 1 ·
High School Read in a book that fall in a bh is the sameto go at c
- Ignition
- · Replies 2 ·
Graduate Surface brightness profiles: sech^2 fit in mag/arcsec^2 units?
- mdemone
- · Replies 1 ·
Graduate Is the Multiverse a Revolving Landscape of Universes?
- dkv
- · Replies 5 ·
Graduate Does the accelerated Expansion add credibility to Steady State Cosmology?
- Herbascious J
- · Replies 17 ·
Temperature of the surface of a satellite?
- pixel01
- · Replies 7 ·
When will average people be able to take private spaceflights?
- 00PS
- · Replies 9 ·
Graduate How Does the Sudbury Neutrino Observatory Confirm Neutrino Interactions?
- WriterMon
- · Replies 5 ·
What does sky cut mean?
- maverick280857
- · Replies 2 ·
Undergrad Type1a supernovae as evidence for an accelerating universe
- supernovae
- · Replies 1 ·
Graduate Reconstruction Primordial Fluctuations from Temperature Anisotropy
- maverick280857
- · Replies 4 ·
Graduate Does the coordinates of time cause the uncertainty in the universe?
- eextreme
- · Replies 1 ·
What is Hanny's Voorwerp?
- Garth
- · Replies 1 ·
Graduate Why didn't the Big Bang singularity become a black hole?
- Alan McDougal
- · Replies 32 ·
Graduate Basic physics in remote universe (proton/electron mass ratio)
- marcus
- · Replies 1 ·
High School Pluto classified as a plutoid
- pixel01
- · Replies 7 ·
Undergrad Can Newton's Law Be Expressed as F=G\rho\rho1\frac{}{} d^{}2?
- Ignition
- · Replies 1 ·
Undergrad Phoenix craft to dig under Mars ice (landing planned 25 May)
- marcus
- · Replies 53 ·
Undergrad How Come Planets Don't Fall Into Stars?
- NYSportsguy
- · Replies 24 ·
Undergrad Gravity Pull: Calculating Time to Impact
- O-r-i-o-n
- · Replies 4 ·
Graduate Comments on the tethered galaxy propblem.
- yuiop
- · Replies 1 ·