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 What is the cosmic microwave background radiation and where did it come from?
- THE 1
- · Replies 23 ·
Graduate Quantum tunneling and the universe
- Rational T
- · Replies 74 ·
Graduate Why Does Dark Matter Appear Scale Variant in Galactic Rotation?
- StationZero
- · Replies 4 ·
Graduate Gravitational field strength for irregular object
- donaldosaurus
- · Replies 3 ·
Graduate Will the expanding universe really end up cold and empty?
- QuantumHop
- · Replies 12 ·
Undergrad What Would Happen if Our Moon Had a Moon?
- lxXTaCoXxl
- · Replies 6 ·
Graduate Spatial dimensions inside a black hole
- atrchi
- · Replies 6 ·
High School Why do different latitudes see different stars?
- buzzdiamond
- · Replies 10 ·
Graduate How is galaxy mass calculated using luminosity
- mesa
- · Replies 5 ·
Graduate Low Entropy big bang , models that explain it
- skydivephil
- · Replies 2 ·
Undergrad How does declination and right ascension relate to latitude / longetude?
- Sqw
- · Replies 4 ·
Graduate If the Earth were adrift in space, what would happen to its atmosphere?
- CCWilson
- · Replies 3 ·
Graduate Viscous fingering and structure of space
- andreas.zita
- · Replies 2 ·
Graduate Big Crunch to Big Bang: Is Our Universe Eternal?
- navilon
- · Replies 2 ·
Graduate Is there a maximum mass for a black hole?
- rogerperkins
- · Replies 94 ·
Graduate Black hole information loss and the holographic principle
- hubble_bubble
- · Replies 2 ·
High School Is the Earth Electrically Charged?
- ealbers
- · Replies 19 ·
Undergrad How do you relate space&time and matter&energy?
- Abidal Sala
- · Replies 1 ·
Graduate Estimate Star Formation Rate: Kennicutt-Schmidt Law
- Sagar_C
- · Replies 1 ·
Graduate Which process produces silicon, lithium, bismuth, nickel and uranium?
- Orion78
- · Replies 3 ·
Undergrad Minimum distance between Earth and Mars in their orbits
- deltasata
- · Replies 1 ·
Graduate Does WMAP data imply spacetime is flat?
- johne1618
- · Replies 14 ·
Graduate Is 300eV the Correct Mean Photon Energy for a Black Body at 1 Million K?
- Orion78
- · Replies 5 ·
Graduate The philosophy of Wormholes, Blackholes, Deep space, etc
- ijwakeel
- · Replies 2 ·
Graduate Can an Asteroid Collision with the Moon Create a Debris Cloud Around Earth?
- Groggen
- · Replies 6 ·
Undergrad Are solar flares and CMEs a serious threat to Earth?
- Jeem
- · Replies 14 ·
High School Positions of stars as seen from Mars-different than from Earth?
- KenJackson
- · Replies 10 ·
Graduate Poisson and continuity equation for collapsing polytropes
- AmenoParallax
- · Replies 1 ·
Undergrad Why Correct Horizontal Parallax Errors?
- Philosophaie
- · Replies 2 ·
Undergrad Can a Planet Support an Atmosphere with 50% Earth's Gravity?
- willstaruss22
- · Replies 25 ·
Graduate Do gravitational waves affect our measurements of weight?
- Lelephant
- · Replies 13 ·
Is the Milky Way winding up or spinning out in space?
- Pjpic
- · Replies 10 ·
Graduate Is there an event horizon beyond the visible universe?
- QuantumHop
- · Replies 15 ·
Undergrad Fictional Earthbound Asteroid Collision
- Sporkitude
- · Replies 2 ·
Graduate Derivation of the formula for cosmological redshift
- andrewkirk
- · Replies 32 ·
Undergrad Where there more planets being formed?
- Charles123
- · Replies 4 ·
Graduate What would Mars be like with 50% more density?
- willstaruss22
- · Replies 7 ·
Undergrad Black hole - frequencies used for viewing
- isha89
- · Replies 1 ·
Undergrad Is a black hole a quasar or blazar?
- isha89
- · Replies 6 ·
Graduate Lightlike radial null geodesic - how do we know it has constant theta and phi?
- andrewkirk
- · Replies 3 ·
High School What role do neutrinos play in the universe?
- RobinSky
- · Replies 7 ·
High School What would happen to a bullet shot into space?
- tackyattack
- · Replies 9 ·
Can someone identify what this is in the sky below the moon.
- TheRanker
- · Replies 27 ·
Graduate Trying to understand the normalisation of the scale factor to be 1 today
- Heldo Jelbar
- · Replies 4 ·
Graduate Pulling information out of a black hole
- 007craft
- · Replies 1 ·
How to convert my MXF files for importing into FCP X
- Maical Jecol
- · Replies 1 ·
Graduate Sudden Earth Rotation Deceleration Theory
- Cyghost
- · Replies 9 ·
Graduate How can order arise from disorder without violating the second law?
- Dadalus
- · Replies 10 ·
Graduate Atmospheric Creation on the Moon
- -Callisto-
- · Replies 8 ·
High School Will Curiosity rover's sky crane landing system work?
- jackmell
- · Replies 37 ·
Graduate How thick is a black hole event horizon?
- europa1
- · Replies 11 ·
Graduate New unbiased technique for the measure of the local dark matter density
- drrail
- · Replies 2 ·
Graduate Super Structure - Evidence for Handedness Spiral Galaxies
- betzalel
- · Replies 2 ·
Graduate Black Hole Information Loss Question
- Ynaught?
- · Replies 64 ·
Graduate Can Gauss's Law Explain the Field of an Electron in a Closed Finite Universe?
- Khashishi
- · Replies 4 ·
Graduate Is Dark Energy Present Everywhere in the Universe?
- Chaos' lil bro Order
- · Replies 28 ·
High School Why is the moon in its 3rd quarter on the 7th of the month?
- DeepSpace9
- · Replies 7 ·
Undergrad Could a Hypernova Have Caused the Big Bang?
- DLHill
- · Replies 7 ·
High School When a star forms where does the Gravity come from?
- MattA147
- · Replies 14 ·
Undergrad Could there be a portal inside or near the sun?
- Astrid
- · Replies 4 ·
Graduate Antimatter decay rate in a book?
- morganhondam
- · Replies 4 ·
Undergrad Can a planet/moon's atmosphere generate a magnetic field?
- jarroe
- · Replies 5 ·
Graduate Is Spacetime Linear? - The Universe in a Nutshell
- Justinmcg67
- · Replies 3 ·
Graduate Can magnetic fields escape a black hole?
- TheOtherDave
- · Replies 13 ·
Graduate Is it Possible to Locate Earth's Future and Past Positions in the Starry Sky?
- CuriositE
- · Replies 8 ·
Graduate The Big Bang: Radiation Era and Hydrogen Fusing to Helium
- g.lemaitre
- · Replies 5 ·
Graduate Could Black Holes Lead to New Universes?
- aishwaryaj
- · Replies 1 ·
Undergrad Why can't Light Escape Black Holes?
- DRC12
- · Replies 16 ·
Graduate Solar flares triggering seismic events
- Idoubt
- · Replies 19 ·
Undergrad Center of the universe the origin of the big bang?
- jarroe
- · Replies 28 ·
Undergrad Could the Supernova Shock Wave That Created Our Solar System Still Be Detected?
- Ms Music
- · Replies 4 ·
High School How strong is gravity in the center of the earth?
- Bjarne
- · Replies 46 ·
Graduate How does light act leaving, traveling between, and entering galaxies?
- tm3
- · Replies 3 ·
Undergrad The Universe is expanding, but why aren't we?
- Gregory.gags
- · Replies 14 ·
What do you think of The Universe series?
- kikko
- · Replies 2 ·
Graduate Berman's zero energy condition for universe
- twofish-quant
- · Replies 6 ·
Graduate Using iteration to orbit dual suns - losing energy
- Rapidrain
- · Replies 5 ·
Graduate Can New Galaxies Appear Due to Doppler Shift at High Speeds?
- RobinSky
- · Replies 7 ·
Graduate Planck satellite, gravitational waves
- g.lemaitre
- · Replies 8 ·
Graduate What does SR say about the expanding universe?
- NWH
- · Replies 23 ·
High School Does Gravity Ever End and How Does It Affect Objects in Space?
- raeshun
- · Replies 6 ·
Graduate How can EVERY point in the universe be the center?
- Cody Richeson
- · Replies 11 ·
Undergrad Is There a Formula for Calculating Star Altitude and Azimuth Over Time?
- TheSource007
- · Replies 1 ·
Graduate Finding a type Ia supernova catalog with redshift, distance modulus and position data
- smithhs
- · Replies 3 ·
Graduate Singularity in infinite space-time
- Kristiandhd
- · Replies 29 ·
Graduate How exctly the higgs field originted after the big bang?
- Abersman
- · Replies 5 ·
Graduate How is the gain of a radio antenna at 230GHz calculated?
- isha89
- · Replies 2 ·
Graduate Is the Multiverse Hypothesis Losing Steam in Scientific Circles?
- genphis
- · Replies 13 ·
Undergrad Are Lawrence Krauss' theories accepted in physics academia?
- thetaobums
- · Replies 30 ·
Graduate What is the scientific reasoning behind Inflation after the big bang?
- Rorkster2
- · Replies 14 ·
Graduate One planet, two suns, ellipse or hyperbola?
- Rapidrain
- · Replies 7 ·
Graduate Planetary orbits spiraling outward in n-body simulation
- Dmalyuta
- · Replies 16 ·
Graduate ESO sheds light on type II supernova
- Chronos
- · Replies 2 ·
Graduate Estimating Star Formation Rate in Plasma Clouds
- Sagar_C
- · Replies 3 ·
Mass, energy, gravity, space, time and math
- Dremmer
- · Replies 6 ·
Undergrad Is the sun electrically charged if its matter is ionized plasma?
- Vinay R Hegde
- · Replies 24 ·
Graduate Polarized Light and Quantum Spin
- ImaLooser
- · Replies 4 ·
Graduate What Lies Beyond the Expanding Universe?
- ImBatman
- · Replies 15 ·
Graduate Why should rotating black holes emit particles?
- Confuses
- · Replies 3 ·
Graduate Can We Detect an Ongoing Enlarging of Everything in the Universe?
- jharvath
- · Replies 7 ·