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 Cosmic Microwave Background primer
- Chronos
- · Replies 7 ·
Roving Mars: IMAX movie coming soon
- Ivan Seeking
- · Replies 2 ·
Graduate A question related to cosmology( or perhaps philosophy)
- kant
- · Replies 13 ·
Graduate Dating techniques for our universe
- nnxion
- · Replies 2 ·
Graduate Do quasar redshift anomalies challenge mainstream theories?
- lezardo
- · Replies 10 ·
High School Has Dark Matter Been Found and Does It Bend Light?
- touqra
- · Replies 2 ·
Undergrad How Do We Calculate the Weight of Celestial Bodies in the Solar System?
- Blahness
- · Replies 4 ·
Graduate Stellar evolution of massive stars at very low metallicities
- Chronos
- · Replies 1 ·
Undergrad Is the Sun's Core Really Made of Iron?
- /0
- · Replies 6 ·
Graduate Terrestrial planet search review paper
- marcus
- · Replies 1 ·
Graduate How do massive planets eject smaller planets during formation?
- topito2
- · Replies 2 ·
Undergrad Horizons Mission: How Will the New Horizons Probe Leave the Solar System?
- Nacho
- · Replies 2 ·
Graduate CMBR as an absolute reference frame
- Dorje
- · Replies 2 ·
Undergrad Gravitational flux in solar system?
- jhe1984
- · Replies 6 ·
Undergrad Equitorial/Horizontal co-ordinate questions
- Brewer
- · Replies 6 ·
High School Air baloon and came back down about 12 hours later
- gm5170
- · Replies 6 ·
Undergrad Do black holes really vaporize through Hawking radiation?
- varsha
- · Replies 8 ·
Graduate Important Findings on Dark Matter
- franznietzsche
- · Replies 12 ·
Undergrad Does the Expansion of Space Mean Everything is Growing?
- Saoist
- · Replies 4 ·
Graduate Sun ejects its outer layers as it becomes a white dwarf
- ukmicky
- · Replies 7 ·
Graduate Close encounters of the massive kind
- Nereid
- · Replies 14 ·
Undergrad Why doesn't Jupiter's gravity compress its gases into solids?
- Hurricane
- · Replies 10 ·
Undergrad Stardust sample return mission results
- Ivan Seeking
- · Replies 16 ·
Graduate Is the Singularity Infinitely Dense and Small?
- JCCol
- · Replies 2 ·
Undergrad NASA Observation: Cartwheel's Massive Rings
- hypatia
- · Replies 3 ·
Graduate Life on a brown dwarf or a fissioning rouge planet?
- Loren Booda
- · Replies 2 ·
Graduate Can Nemesis and Planet X still be ruled out?
- Nereid
- · Replies 14 ·
Graduate Pioneer anomaly and outer planet orbital motions
- varsha
- · Replies 16 ·
High School Why don't interstellar gas clouds drift through our solar system?
- jhe1984
- · Replies 8 ·
High School 'nothing' happened before the big bang?
- varsha
- · Replies 3 ·
High School How to find the best time of year to observe a star from my location
- Brewer
- · Replies 1 ·
Graduate Are Multi Universes and Infinite Space Possible with Big Bang Theory?
- David_777
- · Replies 3 ·
Graduate What is the Latest Update on CMB (end 2005)?
- marcus
- · Replies 1 ·
Graduate A New Explanation for Venus' Retrograde Rotation
- WarrenPlatts
- · Replies 10 ·
Graduate Areas of space that we cannot see that also have an effect on expansion?
- Rake
- · Replies 14 ·
High School Can Sound Be Heard on Other Planets?
- bags
- · Replies 1 ·
Graduate Can we observe black holes consuming matter?
- ukmicky
- · Replies 5 ·
Graduate Modeling the Milky Way with isothermal and NFW dark matter profiles
- S.P.P
- · Replies 7 ·
Graduate Not sure this is the right thread for this?
- Schrodinger's Dog
- · Replies 3 ·
High School Are distant stars actually younger or the same age as nearby stars?
- Blahness
- · Replies 10 ·
Graduate What Is the Shape of the Universe?
- Wizardsblade
- · Replies 6 ·
High School Trapezium in orion was a very strange quadruple star
- jnorman
- · Replies 2 ·
Three cheers and two years for the Mars rovers
- Ivan Seeking
- · Replies 7 ·
Undergrad Why don't stars explode? What holds them together?
- alancj
- · Replies 32 ·
Undergrad Planetary Orbits Around Black Holes
- varsha
- · Replies 2 ·
Undergrad How do they know the universe is expanding
- ukmicky
- · Replies 9 ·
Graduate What happens if you travel beyond the edge of the universe?
- Silverbackman
- · Replies 7 ·
Heim-Dröscher space,eight-dimensional universe, Mars-Earth: three hour trip
- Dr. Nick
- · Replies 1 ·
Earth Seen from Mars - NASA JPL Image
- scott1
- · Replies 4 ·
Undergrad Can a 2 million pound asteroid stay in moon orbit for 20 years?
- Plastic Photon
- · Replies 16 ·
Undergrad Finding the distance to an Asteroid
- dimensionless
- · Replies 2 ·
Graduate The Cosmological Parameters 2005
- marcus
- · Replies 3 ·
What would it take to completely destroy a planet?
- NavyMan
- · Replies 21 ·
Graduate Frank Tipler on Matter-Energy Conversion
- WarrenPlatts
- · Replies 21 ·
Earth Space Agency: Your Opinion Matters
- sandijs
- · Replies 2 ·
Graduate Would black holes form before matter converted to energy in a contracting universe?
- zanazzi78
- · Replies 4 ·
Graduate Same star in many places in the sky
- -Job-
- · Replies 11 ·
Graduate Addressing Impossibilities in the Standard Cosmological Model
- turbo
- · Replies 33 ·
High School What would a spacetime diagram of a binary star system look like?
- blumfeld0
- · Replies 5 ·
High School Holographic universe and werewolves/shapeshifters.possible?
- jimmy1200
- · Replies 2 ·
Graduate New Clifford Will paper (LISA, BHs)
- marcus
- · Replies 1 ·
Not your standard '2005 in review' thread
- Nereid
- · Replies 3 ·
Graduate Alternate sources for 3K background radiation?
- Graviman
- · Replies 7 ·
Undergrad How do Earth's orbital plane and Moon's orbital plane intersect?
- -Job-
- · Replies 1 ·
Undergrad What is the physical description of negative pressure?
- helenwang413
- · Replies 12 ·
Undergrad What Causes the Vibrant Cloud Colors on Jupiter?
- mrjeffy321
- · Replies 1 ·
Undergrad How Big Would a Black Hole Be if All the Stars in the Universe Combined?
- van gogh
- · Replies 6 ·
Undergrad How Do We Know the Sun's Orbit Through the Galaxy?
- Mk
- · Replies 2 ·
Graduate Is It Possible to Destroy Stars Technologically?
- Aurora Firestorm
- · Replies 27 ·
High School I am probably going to be critizied for this, but
- modeman
- · Replies 34 ·
Graduate What Happens When a Star Exceeds the Chandrasekhar Limit and Forms a Black Hole?
- ThomasFuhlery
- · Replies 3 ·
Graduate Number of parallel universes formed at each measurement
- Mr. Tambourine Man
- · Replies 8 ·
Graduate Does an intelligent universe require time travel to exist?
- Causal
- · Replies 1 ·
Undergrad Will the temperature in the universe ever reach absolute zero?
- shanu_bhaiya
- · Replies 3 ·
Graduate Do atoms expand at the universal expansion rate?
- Paul Martin
- · Replies 19 ·
Undergrad Could Black Holes Be the Opposite of Suns in the Big Bang Theory?
- runicle
- · Replies 4 ·
Graduate Could the Big Bang Be a Pinched-Off Bubble from a Greater Dimension?
- Lord Draco
- · Replies 6 ·
Graduate Is Blackhole Symmetry Proportional to Information Exchange?
- Olias
- · Replies 38 ·
Graduate What do we actually know about dark energy and dark matter?
- jhe1984
- · Replies 1 ·
About to become an armchair astronomer
- jhe1984
- · Replies 1 ·
Graduate Why is the CMB so uniform and isotropic?
- vincentm
- · Replies 1 ·
Undergrad How do know if something is red-shifted without prior knowledge?
- Saoist
- · Replies 4 ·
Undergrad How Do We Know The Age Of The Universe For Sure?
- Silverbackman
- · Replies 6 ·
Graduate Why does both a static and expanding universe need a cosmological constant?
- pivoxa15
- · Replies 6 ·
Graduate What is Universeguy's Paradox in the Study of the Pary Galaxy?
- japam
- · Replies 26 ·
Graduate Correct Understanding of Big Bang Theory
- Lord Draco
- · Replies 3 ·
Graduate A theory of gravity based on special relativity
- Garth
- · Replies 7 ·
Graduate Space-Time Fabric: Is There Anything Beyond?
- M Telepathic
- · Replies 1 ·
Graduate What is coordinate precession in Mercury's perihelion precession?
- RandallB
- · Replies 15 ·
Undergrad Does the Earth-Moon center of mass follow an elliptical orbit around the sun?
- dimensionless
- · Replies 7 ·
Graduate Big Bang and the Law of Conservation of Matter/Energy?
- M Telepathic
- · Replies 3 ·
Graduate What is the cuspy halo problem in dark matter?
- jhe1984
- · Replies 2 ·
Graduate Will cosmology ever confirm the Big Bang theory?
- vincentm
- · Replies 2 ·
High School Lifecycles of Stars: What Causes Gravity in the Beginning?
- mrhessy
- · Replies 1 ·
Have You Ever Watched the Movie Spaceballs?
- Blahness
- · Replies 14 ·
Graduate Do gravitational waves exist?
- Spin_Network
- · Replies 37 ·
Graduate Discussion/essay for uni on the Inflation proscess
- JohnnyTheFox
- · Replies 24 ·
Undergrad Does a Flat Universe Have an Edge?
- pivoxa15
- · Replies 3 ·
Undergrad Can the universe repeat identically after a big crunch and new big bang?
- waderoo
- · Replies 17 ·
Graduate Could the Big Bang Allow for an Infinite Universe?
- pivoxa15
- · Replies 1 ·