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
Garbage Universe: A Thought on Parallel Dimensions
- Chaos' lil bro Order
- · Replies 30 ·
Stargazing Reflecting Telescopes: Hole in Picture at Focus?
- skiboka33
- · Replies 20 ·
Stargazing Trig in Telescopes: Theta Formula & Astronomy Sites
- skiboka33
- · Replies 9 ·
Graduate Galaxy Rotation Curves Without Non-B. Dark Matter
- marcus
- · Replies 1 ·
High School Space-Time dimentions & plane of Sxistence
- bayan
- · Replies 2 ·
Graduate Pure randomness & the incomprehensible universe
- decs
- · Replies 19 ·
Graduate Can a powerful telescope reveal the true limits of the universe's distance?
- Spin_Network
- · Replies 3 ·
Graduate Is the Universe Shaped Like a Dodecahedron?
- Spin_Network
- · Replies 7 ·
Graduate [Andromeda] Fast traveling stars
- vincentm
- · Replies 11 ·
High School Project in relation to Einstein on geo-reactors
- dietrich schuler
- · Replies 1 ·
Graduate Is the universe still expanding?
- Simetra7
- · Replies 69 ·
Graduate Quantum Geometry and Schwarzschild Singularity?
- Spin_Network
- · Replies 2 ·
Graduate How can accurate orbits and masses be determined in astronomy?
- petra
- · Replies 1 ·
Parallel Universe: Existence & Speculations
- ranger
- · Replies 2 ·
Graduate Fastest neutron star, 1100 km/second
- marcus
- · Replies 10 ·
Stargazing New 135mm/f2.8 Lens & Rig: My Experiences So Far
- russ_watters
- · Replies 3 ·
Graduate Could dark matter be error in GR or temporal effect
- jim_990
- · Replies 2 ·
Undergrad Is the Big Crunch a Mathematical Possibility for the Universe's End?
- aniket
- · Replies 2 ·
Undergrad Looking for an Introductory Book on Orbital Mechanics?
- BobG
- · Replies 3 ·
Undergrad Unraveling the Mystery of Dark Matter
- aniket
- · Replies 4 ·
Graduate Solar/Stellar Model Overview & Parameters
- Nereid
- · Replies 6 ·
Finally, the Greatest Questions of the Universe Have Been Answered
- Entropy
- · Replies 2 ·
Graduate AIAA - Textbooks in Aerodynamics and Space Engineering
- Astronuc
- · Replies 0 ·
Graduate Omega pointe and the Big crunch theories
- vincentm
- · Replies 6 ·
Graduate Halo and Lissajous Orbits: Powered or Natural?
- tony873004
- · Replies 5 ·
Graduate Is there a connection between antimatter and the expansion of the universe?
- Nekromancer
- · Replies 8 ·
High School Relation between the moon's gravitation and the level of ocean
- kiru
- · Replies 1 ·
SpaceTiger has wandered into the cellar
- wolram
- · Replies 61 ·
High School What would be the effects of Earth not having a moon?
- vincentm
- · Replies 13 ·
High School Saturn Satellites: Collapse & Reconstruction
- nzahra_ghasemi
- · Replies 9 ·
Did an Asteroid Really Hit Antarctica in 2004?
- LURCH
- · Replies 11 ·
Graduate What's the acceleration of our galaxy?
- Lucretius
- · Replies 9 ·
Undergrad Question on stellar absorption spectra
- ddoctor
- · Replies 25 ·
Graduate Most distant gammaray blast detected
- marcus
- · Replies 10 ·
Graduate An Old quasar in a Young Universe?
- Garth
- · Replies 14 ·
Undergrad What are some recommended objects for a semester project in optical astronomy?
- DarkEternal
- · Replies 1 ·
Graduate Space Ship Collision: How Far Did Meteorite Come?
- japam
- · Replies 2 ·
High School Is the Milky Way Moving Towards the Hydra Constellation?
- anarchy.spirit
- · Replies 3 ·
Graduate The solar systems and space probes
- vidmar
- · Replies 1 ·
Undergrad Theories about the beginning of the universe
- amitmis
- · Replies 1 ·
Graduate Clustering of primordial black holes
- wolram
- · Replies 7 ·
Graduate Formula for solar radiation pressure
- tony873004
- · Replies 8 ·
Course :astrophysics ,introduction ,e.a
- petra
- · Replies 1 ·
High School Identification of an object in the sky
- Cladson
- · Replies 6 ·
Undergrad Universe expansion and merging galaxies
- vincentm
- · Replies 20 ·
Undergrad Saturn's Rings Shifting: New Findings
- Cladson
- · Replies 3 ·
Undergrad Do Light Wavelengths from the Sun's Edges Differ from Its Center?
- mcgucken
- · Replies 11 ·
High School Stars move as the night progresses
- big man
- · Replies 14 ·
Graduate Absorption in 'CMBR' wavelengths - observations? processes?
- Nereid
- · Replies 21 ·
Can someone help me identify this object in my photo?
- Uchuujin_7
- · Replies 4 ·
Undergrad Why Does Planet's Molten Core Create Magnetic Fields?
- sniffer
- · Replies 28 ·
Space & Military: Militarization of Space?
- grant555
- · Replies 23 ·
Undergrad Can a Galaxy Collapse Inward Over Time?
- wonderingx
- · Replies 3 ·
Graduate Speculation is detracting true astrometry
- wolram
- · Replies 3 ·
Graduate What Is the True Nature of Empty Space?
- Tjl
- · Replies 4 ·
Stargazing What do you recommend is the best way to clean a lense(telescope)
- Cladson
- · Replies 1 ·
Mars rover adds hill climbing to list of accomplishments
- AA Institute
- · Replies 4 ·
How many tv programs are about astronomy, science?
- wolram
- · Replies 7 ·
Graduate Observational Dark Energy - SN1a wiggle room?
- Nereid
- · Replies 1 ·
Graduate The origin of cold dark matter halo density profiles
- Garth
- · Replies 2 ·
Stargazing How is the principle of the operation of radio telescope?
- yu_wing_sin
- · Replies 2 ·
If you could go anywhere in time and space
- Ivan Seeking
- · Replies 18 ·
Undergrad For those who think life is rare
- turbo
- · Replies 57 ·
Graduate Can You See the Entire Universe Before Entering a Black Hole?
- Temporarily Blah
- · Replies 9 ·
Undergrad What If the Earth's Orbit Was Changed?
- Boo75
- · Replies 11 ·
Undergrad [astrogeology] measuring atmospheric density
- vincentm
- · Replies 2 ·
Graduate What resources are available for studying higher dimensional quantum cosmology?
- ylping
- · Replies 6 ·
Mystery Light: Can Anyone Explain What I Saw in the Sky?
- matthyaouw
- · Replies 18 ·
Graduate Did condensation accompany the initial big bang expansion?
- Loren Booda
- · Replies 5 ·
Undergrad Everything about Big Bang theory
- Lisa!
- · Replies 20 ·
High School Confused on Orbits: Ellipses vs Circles
- Ptolemy
- · Replies 15 ·
Graduate Isn't space expansion expectable?
- Gerinski
- · Replies 10 ·
Power Outage & Mysterious Sky Objects in My Neighborhood
- Cladson
- · Replies 3 ·
Graduate 1 Parsec = 3.08568025 × 10^16 meters
- VantagePoint72
- · Replies 3 ·
Undergrad A supernova can out light a entire galaxy
- Zelos
- · Replies 5 ·
Undergrad Help: Application of Optical Fibre In Astronomy?
- alfu
- · Replies 1 ·
Graduate Does My NBody Simulation Look Accurate?
- crepincdotcom
- · Replies 7 ·
Undergrad Solar Energy Q: Mass of Sun Decrease/s?
- asdf1
- · Replies 6 ·
Undergrad Is Mounting a Telescope on the ISS a Viable Option for Atmospheric-Less Viewing?
- Phobos
- · Replies 2 ·
Graduate Mature stars in ancient galaxies
- turbo
- · Replies 42 ·
High School Why Do Planets Rotate on Their Axis?
- Caesar_Rahil
- · Replies 3 ·
High School What Makes Neutron Stars So Unique?
- BigBang
- · Replies 32 ·
Undergrad Is there a super-massive black hole in the center of our galaxy?
- Echo 6 Sierra
- · Replies 7 ·
Graduate On the large-angle anomalies of the microwave sky
- marcus
- · Replies 21 ·
Graduate Orbit smulation and speed of gravitation
- serge
- · Replies 3 ·
Graduate Do White Holes Really Exist and What Are Their Properties?
- paul_abbotts
- · Replies 8 ·
Undergrad What is the Chandrashekhar Limit and How is it Calculated?
- aniket
- · Replies 16 ·
Undergrad How closely could the Moon orbit the Earth
- ohwilleke
- · Replies 17 ·
Undergrad Free Graphing Software for Polar Coordinates & Irreducable Functions
- HiPPiE
- · Replies 6 ·
Graduate Galactic Formation: The Last Galaxy and the Ongoing Creation Process
- Spin_Network
- · Replies 15 ·
High School How Our Place in the Galaxy Affects Life on Earth
- Bobby R
- · Replies 5 ·
Undergrad How long until we reach Type 1, 2, & 3 civilizations?
- Whitestar
- · Replies 48 ·
Graduate Who was John Bahcall and what impact did he have on the astrophysics community?
- SpaceTiger
- · Replies 7 ·
High School Philosophy in The Elegant Universe
- Jeremy
- · Replies 6 ·
Graduate Parallel Worlds: A Question From Olbers' Paradox
- Crumbles
- · Replies 20 ·
High School Telescope Recommendations for Viewing Galaxies & Nebulae in FL
- Cladson
- · Replies 3 ·
Is there a dominant colour in our universe?
- wolram
- · Replies 9 ·
Graduate Black Holes & Universes: Theory & Discussion
- kjknohw
- · Replies 4 ·
Graduate Dark Matter CEUs: Katherine Freese's State of the Union Address
- Chronos
- · Replies 3 ·
Stargazing 14mm reflector with a 900mm focal length
- zanazzi78
- · Replies 7 ·