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
High School Silly Question Re Distance and Time
- Ian J.
- · Replies 10 ·
Graduate The paradox of Hawking radiation - is matter infinitely compressible?
- jarekd
- · Replies 22 ·
Undergrad How does jupiter's moon get so hot?
- ehab_s
- · Replies 26 ·
Graduate Question on Gravity, Big Bang, Dark Energy and Black Holes
- vatzis
- · Replies 4 ·
Website For Universe map, and Matter Totals
- nick1o2
- · Replies 3 ·
Graduate Estimate the number of stars with present-day luminosity function
- 2203312
- · Replies 1 ·
High School Is it possible for the earth to come off orbit and crash into the sun?
- andyM1998
- · Replies 27 ·
Graduate The Observable Universe ve The Universe
- Nugso
- · Replies 5 ·
Undergrad Radiated Energy from the Sun: Is It Diminishing?
- Jimmy B
- · Replies 9 ·
Undergrad New Theory: Moon Formation & Potential Venus Collision
- Adrian07
- · Replies 2 ·
Graduate Tachyons and black matter/energy
- fantasio
- · Replies 1 ·
Graduate Can a closed universe expand forever?
- Crazy4Physics
- · Replies 1 ·
Graduate Inflation and Element Formation: Irreconcialble?
- aboro
- · Replies 33 ·
Odd Body in Asteroid Belt with 6 Tails
- Dotini
- · Replies 4 ·
Undergrad Forgotten force: The other great cosmic attractor
- mrcotton
- · Replies 4 ·
Finding an Astronomer for Your Fictional Galaxy: Tips and Tricks
- sozme
- · Replies 1 ·
Undergrad What Will Happen if Universe Stops Expanding?
- sozme
- · Replies 3 ·
Graduate Seeking thorough derivation of Friedman equations
- andrewkirk
- · Replies 22 ·
Graduate Giant monopoles as a dark matter candidate
- Chronos
- · Replies 1 ·
Graduate Can electric fields/currents be seen on the sun?
- online365
- · Replies 5 ·
Undergrad Unveiling the Universe: Understanding the Composition of Our Cosmos
- wolram
- · Replies 6 ·
Graduate How did time behave while the universe expanded so rapidly?
- noxic
- · Replies 18 ·
Graduate Can neutrinos travel faster than light?
- Ysara
- · Replies 6 ·
Graduate What's on the other side of a black hole?
- assassinsdoc
- · Replies 6 ·
Undergrad Is Big Bang True? Physics and SR/GR
- jinchuriki300
- · Replies 84 ·
Graduate What is the current evidence for dark matter?
- dryogeshd
- · Replies 31 ·
Graduate Conceptual problem on black hole singularity
- assassinsdoc
- · Replies 6 ·
Undergrad How Many Universes Exist in the Multiverse?
- Ahmed_usa
- · Replies 4 ·
Graduate What is the estimated mass flow in relativistic jets from black holes?
- mcjosep
- · Replies 1 ·
Undergrad Calculating Mass Lost of Iron Asteroid Hitting Earth
- dannyod6504
- · Replies 5 ·
Graduate Curious inquiry about exotic matter
- sozme
- · Replies 3 ·
Undergrad Why Do Galaxies Spin and What Role Do Black Holes Play?
- ryanuser
- · Replies 8 ·
Graduate Is cosmology truly precise or is it just full of approximations and assumptions?
- Fizicks1
- · Replies 8 ·
Graduate How to Calculate the Lower Limit of the Diameter of an Icy Minor Planet?
- duder1234
- · Replies 3 ·
Undergrad How long do you expect transit to last?
- duder1234
- · Replies 3 ·
Graduate Why wasn't the Big Bang an isotropic explosion?
- randybryan
- · Replies 13 ·
Graduate Pulsar Orbiting another body, doppler shifted pulse rate problem
- Mechanic403
- · Replies 1 ·
Graduate In the future, an Exobyte of astronomical data per day
- rhody
- · Replies 4 ·
Graduate Flywheel inside a spaceship experiment
- Jeronimus
- · Replies 11 ·
Undergrad Achievable orbit from launch location
- ank_gl
- · Replies 4 ·
Graduate Inflationary Cosmologys effects on the strong nuclear force
- ilikescience94
- · Replies 7 ·
Undergrad Aphelion and Perihelion distance calculations
- ExoP
- · Replies 5 ·
Graduate What factors affect the age of the universe?
- anubodh
- · Replies 2 ·
Graduate What Insights Does the LUX Experiment Provide on Dark Matter Detection?
- bcrowell
- · Replies 12 ·
Graduate Which came into existance first: Energy or Mass?
- jacket
- · Replies 20 ·
Graduate LUX Results: Trouble for WIMPs Dark Matter Models?
- John86
- · Replies 1 ·
Graduate Help with Friedman equations and density of energy
- Helpsearcher
- · Replies 2 ·
Graduate Lower Bound On Dark Matter Mass Density
- embphysics
- · Replies 1 ·
Undergrad Temperature in Space: Is -273°C Possible?
- Jarfi
- · Replies 15 ·
Undergrad Designs for a space station with artificial gravity
- ProdiG
- · Replies 12 ·
High School Are galaxy orbiting around something?
- 13lackJesus
- · Replies 3 ·
Most Distant Galaxy EVER Discovered
- bodykey
- · Replies 5 ·
Graduate Can We Poke a Hole Through the Fabric of Space?
- Axefly
- · Replies 9 ·
Graduate Understanding double-peaked HI profiles
- clandarkfire
- · Replies 1 ·
Graduate Can Luminosity Give You a Star's Age?
- chefskitten
- · Replies 8 ·
Graduate How fast can a neutron star spin before it becomes asymmetrical?
- MathJakob
- · Replies 10 ·
Graduate What is the equation for the amplitude of scalar perturbations ?
- phypar
- · Replies 3 ·
Graduate Calculating Angular vs Lateral Acceleration of Objects Suspended in Zero Gravity
- xpoisnp
- · Replies 3 ·
Graduate What would happen to an earth sized body of water?
- emergentsystem
- · Replies 10 ·
Graduate What Caused the Small Flash in the New Bang Theory?
- mephestopheles
- · Replies 8 ·
Graduate Why space expansion is limited to scales larger than galaxy clusters?
- Andrea Panza
- · Replies 2 ·
Graduate Neutron stars on collision course.
- Pds3.14
- · Replies 2 ·
Graduate Coronal heating by solar braiding
- Astronuc
- · Replies 1 ·
Graduate How are neuton stars intensly magnetic?
- Superposed_Cat
- · Replies 10 ·
High School Can Astronomy and Cosmology Bridge the Gap Between Creationism and Evolution?
- Canis Majoris
- · Replies 5 ·
Graduate Will light get reflected at edge of space
- DRBU012
- · Replies 4 ·
Graduate How do you think of the Cosmic Event Horizon?
- marcus
- · Replies 9 ·
Graduate Sensors and Cameras for Local Space Analysis
- bodykey
- · Replies 4 ·
Graduate What are the boundary conditions of the universe?
- Superposed_Cat
- · Replies 4 ·
Graduate Is H(hbar)/2c^2 a Possible Fundamental Unit of Mass?
- yogi
- · Replies 89 ·
Undergrad Hubble's Deep Field View in the long long Future
- PhanthomJay
- · Replies 22 ·
Undergrad Simulated astrophysics equations
- conure
- · Replies 2 ·
Graduate Cosmology as quantum, ie. M-theory
- Milan Nikolic
- · Replies 2 ·
Graduate Proper Motion, Radial Velocity
- ckirmser
- · Replies 4 ·
Unfathomable Possibilities of an Infinite Universe
- howabout1337
- · Replies 16 ·
Undergrad Orbits of objects of equal mass
- emergentsystem
- · Replies 1 ·
Graduate Can We Visualize Spatial Direction in Space?
- USCadam89
- · Replies 3 ·
Stargazing How deep can Hubble Telescope see?
- Herbascious J
- · Replies 4 ·
Graduate Novel way for interstellar travel
- udtsith
- · Replies 5 ·
Undergrad Are Galaxies the Same Age if they are the Same Distance From Us?
- EskWIRED
- · Replies 3 ·
Graduate Is the concept of space and time before the Big Bang scientifically irrelevant?
- Superposed_Cat
- · Replies 4 ·
Graduate Can a solid planet become a star?
- fbs7
- · Replies 21 ·
Undergrad What Are the Key Challenges Preventing Us from Occupying Space?
- bodykey
- · Replies 20 ·
Undergrad Can a Gamma Ray Burst create a shadow on Earth from the Sun?
- tionis
- · Replies 12 ·
Graduate Laser Communications in Outer Space
- bodykey
- · Replies 9 ·
Graduate Could the objects in the universe be shrinking?
- theojohn4
- · Replies 24 ·
Graduate Could Black Holes Be Baby Universes Evolving Backwards in Time?
- fractalzen
- · Replies 1 ·
Graduate Origin from Nothing - what does it mean?
- StateOfTheEqn
- · Replies 51 ·
Undergrad IRAF can't deal with .fits files
- PLuz
- · Replies 7 ·
Graduate Empirically testing black holes.
- MathematicalPhysicist
- · Replies 5 ·
Graduate Deceleration Parameter Computation
- roam
- · Replies 5 ·
Graduate Does geometry have any bearing on the fine tuning argument.
- Redstart
- · Replies 12 ·
Graduate Is it Reasonable to Assume our Galaxy is in a Steady State?
- mmtwwla
- · Replies 1 ·
Undergrad Acceleration proportional to what?
- us40
- · Replies 3 ·
Graduate Can you imagine geometry without matter and light?
- marcus
- · Replies 31 ·
Undergrad Gravity and Supernova - My understanding
- EinsteinII
- · Replies 6 ·
Graduate Acceleration of expanding universe question
- qedigiv
- · Replies 1 ·
Graduate How Does Light Behave Near a Star?
- bodykey
- · Replies 2 ·
Graduate No Boundary Condition Universe: Stephen Hawking
- us40
- · Replies 5 ·
Graduate Light that is directed towards the center of a black hole
- jaydnul
- · Replies 10 ·