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 What causes the equatorial bulge?
- Sheneron
- · Replies 10 ·
Graduate Is Cosmological Inflation the reason for the uniformity of the universe?
- Dav333
- · Replies 8 ·
Graduate How would a universe with zero total mass behave?
- Xbehave
- · Replies 8 ·
Graduate A question regarding the orbit of material in a galaxy such as ours
- shalayka
- · Replies 2 ·
Undergrad Can two planets inhabit the same orbit?
- astro1000000
- · Replies 4 ·
An astrophysicist (+blogger) to be aware of
- marcus
- · Replies 0 ·
Undergrad Just Checking - Calculating Angular Diameter of Moon
- TFM
- · Replies 2 ·
Graduate Can there be anything outside of our Existance?
- Blahness
- · Replies 15 ·
Graduate Measuring the temperature of quasars
- Frank Lampard
- · Replies 2 ·
Undergrad Finding absolute magnitude from parallax and apparent magnitude
- redbaldyhead
- · Replies 1 ·
Graduate Could Dark Matter be mass in EM fields?
- warwickphys
- · Replies 7 ·
How to solve an HR diagram problem
- Tuugii
- · Replies 3 ·
Graduate Dark Energy and the Accelerating Universe (survey)
- marcus
- · Replies 2 ·
Undergrad Advantage of measuring stellar parallaxes from Mars rather than Earth?
- bse
- · Replies 2 ·
Graduate Would dark matter accumulate at the centers of stars and planets?
- nesp
- · Replies 11 ·
Graduate Acceptable cosmological discussions
- CBC
- · Replies 4 ·
Support Space Exploration: Agree or Not?
- wolram
- · Replies 1 ·
Graduate If blackholes, then antiblackholes?
- pseudo
- · Replies 2 ·
How do i find a Astronomy club close to me ?
- mouse23432
- · Replies 2 ·
Undergrad Is the Universe Spinning After the Big Bang?
- Hool
- · Replies 1 ·
Undergrad Satellite Right Acension and Declination Calculations
- isi
- · Replies 4 ·
Undergrad Are matter and energy equally represented
- crazylum
- · Replies 2 ·
Stargazing Meade DS-2130AT GoTo telescope for a beginner
- mouse23432
- · Replies 4 ·
Stargazing Why Do Telescopes Have Long Focal Lengths?
- pixel01
- · Replies 11 ·
Graduate Can Particle-Antiparticle Pairs Form Stable Unions?
- ffleming7
- · Replies 3 ·
Graduate Radiative transfer to space affected by atmosphere?
- Mapes
- · Replies 3 ·
Graduate Cosmological relativity theories
- cosmoboy
- · Replies 3 ·
Star Threatens Earth: Is it Real?
- engineroom
- · Replies 4 ·
Undergrad Measuring Distance: How Far Are Stars?
- iGen3
- · Replies 3 ·
Appearance of the lakes on Titan
- Meatbot
- · Replies 2 ·
High School Gravity Anomaly: What Could Be Causing It?
- Ms Music
- · Replies 2 ·
Graduate Is There a Gravitational Spectrum for Measuring Wavelengths?
- sysreset
- · Replies 3 ·
Graduate Can Information Really Be Lost in Black Holes and Our Minds?
- lazyaxus11
- · Replies 15 ·
Graduate Can an observer entering a black hole reach the end of time?
- Tuugii
- · Replies 3 ·
How do I remove Tom from my MySpace friends list?
- quantumdude
- · Replies 78 ·
Graduate Is the Drake Equation Still Relevant in Today's Rapidly Advancing Technology?
- fab07
- · Replies 1 ·
Graduate Carbon dust mistaken for Dark Energy all this time?
- SF
- · Replies 2 ·
Undergrad Would you expect comets to follow the ecliptic? Explain.
- kay89
- · Replies 2 ·
Graduate Birth of Planetary Systems: Starless Possible?
- TShock
- · Replies 2 ·
Undergrad Where Can I Find the Radial Velocity of the Sun Relative to Earth?
- Archduke
- · Replies 5 ·
Undergrad Galactic Structure: Do Astrophysicists See Stars Where They Are Now?
- TShock
- · Replies 1 ·
Graduate Gravity as consequence of universe expansion
- Blade Runner
- · Replies 4 ·
Undergrad Why do stars vary in size if fusion begins at a critical mass?
- TShock
- · Replies 5 ·
Graduate Pioneer anomaly and whether gravity weakens with distance
- Ivan Seeking
- · Replies 65 ·
GRAVITAS GRAVITAS: Portraits of a Universe in Motion - Freely Available
- shalayka
- · Replies 5 ·
Graduate Trajectory of a Test Particle in a Semidetached Binary
- M87
- · Replies 1 ·
Undergrad Do Planets' Magnetic Fields Depend on Their Composition?
- CaptainQuasar
- · Replies 3 ·
Graduate Can objects in space appear to move backwards in time?
- Matthieu
- · Replies 3 ·
Undergrad Rotation period vs. mass of planets in solar system
- pixel01
- · Replies 7 ·
Graduate Can Negative Energy Keep Wormholes Open in the Theory of Inflation?
- hammertime
- · Replies 2 ·
Undergrad Why did the universe cool after the big bang?
- Alex48674
- · Replies 16 ·
Undergrad Sun rotation difference (equator/latitude/pole)?
- drewterry
- · Replies 5 ·
Graduate Fecund Universe Theory: How Different Are Baby Universes?
- hammertime
- · Replies 1 ·
Undergrad Earth's Orbit Change: Impact on Life - Will We Die?
- night_stroller
- · Replies 3 ·
Graduate What is the Wavelength of Hawking Radiation?
- Orion1
- · Replies 8 ·
Graduate How Do You Convert Monochromatic Flux Between Wavelength and Frequency Units?
- jeebs
- · Replies 1 ·
Undergrad Would Two Identical Planets Opposite Each Other Coalesce Over Time?
- pixel01
- · Replies 4 ·
Stargazing How to Buy a Telescope for Under $150?
- tictac
- · Replies 9 ·
High School Why does anything with mass have it's own gravitational field?
- _Mayday_
- · Replies 20 ·
Graduate Quantum Cosmology Evidence: String, Brane & LQC
- wolram
- · Replies 1 ·
Graduate Can Black Holes Explode Back into Normal Matter After Evaporation?
- Denton
- · Replies 2 ·
Graduate How does black hole evaporation end?
- belliott4488
- · Replies 9 ·
Graduate How unpredictable are stellar evolution paths on the HR diagram?
- Simfish
- · Replies 1 ·
Graduate The Boltzmann distribution of uniformly spaced energy levels
- corr0105
- · Replies 2 ·
Graduate Giant ropes of dark matter found in new sky survey
- SF
- · Replies 1 ·
Graduate How can matter enter a black hole if time stops at the singularity?
- life=games&math
- · Replies 25 ·
High School Stars twinkle, but planets don't?
- fatty
- · Replies 1 ·
High School What is the difference between cosmology and astrophysics
- danzi
- · Replies 6 ·
Stargazing Total eclipse of the moon tonight.
- Jimmy Snyder
- · Replies 76 ·
Stargazing Eclipse viewing last night with a Dobsonian telescope
- NerfMonkey
- · Replies 11 ·
High School What causes gravity? Is it mass or weight?
- razerfish
- · Replies 15 ·
Undergrad Can Gravity Really Repel? Understanding Gravitons and Common Misconceptions
- shaan_aragorn
- · Replies 31 ·
Shooting the moon. did i get a space station?
- glondor
- · Replies 2 ·
Graduate How Does Solid Hydrogen Influence Astrophysics?
- jal
- · Replies 2 ·
Graduate Where did the Big Bang's particles come from and what does the universe expand into?
- thinkies
- · Replies 27 ·
Graduate Are Singularities in the Universe Possible?
- Chimps
- · Replies 13 ·
High School Orbital data for the nine planets
- Nawaf
- · Replies 3 ·
Graduate Does planetary reflected light spectrum equal the star's spectrum scaled by albedo?
- BERGXK
- · Replies 3 ·
Graduate Why doesn't light blueshift entering our local space if redshifted by metric expansion?
- Emreth
- · Replies 13 ·
Graduate Hubble expansion inside a contracting supercluster
- jonmtkisco
- · Replies 24 ·
High School Ultimate fate of ISS (International Space Station)
- sysreset
- · Replies 5 ·
Undergrad What Would Happen if Earth and a Black Hole Interacted?
- pchalla90
- · Replies 10 ·
Undergrad The Milky Way is twice the size we thought it was
- SF
- · Replies 2 ·
Undergrad Protecting Craft from Solar Wind: How Far Does Our Magnetic Field Reach?
- Sheneron
- · Replies 2 ·
Graduate What causes the universe to eventually colapse?
- Alex48674
- · Replies 12 ·
Graduate Can Higgs Particles Cause Universe Expansion Due to Negative Density?
- Invariant
- · Replies 3 ·
Undergrad Human in outer space without space suit
- smallphi
- · Replies 20 ·
Graduate Dark matter and the Standard Model
- jnorman
- · Replies 17 ·
Undergrad Is Dark Matter Just Unseen Molecules?
- touqra
- · Replies 12 ·
Graduate A few questions =] (time and big bang)
- Alex48674
- · Replies 9 ·
Graduate How Can Astrophysicists Be Rescued from Mars Using Special Relativity?
- Veratule
- · Replies 8 ·
Graduate Dark energy a furphy, says new paper
- SF
- · Replies 50 ·
Is Big Bang the Funniest Show Ever?
- razerfish
- · Replies 17 ·
Graduate SETI: What would it take to monitor all probable bands.
- Taremos
- · Replies 4 ·
High School What is the difference between opacity and optical depth?
- O-r-i-o-n
- · Replies 10 ·
How Can We Improve Our Community Together?
- Nickelodeon
- · Replies 4 ·
Graduate What Happens to Matter Before a Black Hole Collapses?
- japam
- · Replies 5 ·
Graduate Galaxy from 700 million year old universe
- marcus
- · Replies 1 ·
Undergrad What is Vacuum Energy and How Does it Exist in Empty Space?
- Alex48674
- · Replies 1 ·
Graduate Could the Universe Have Expanded Immediately After the Big Bang?
- shemszot
- · Replies 18 ·