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 Pressure distribution in the sun
- lead341
- · Replies 2 ·
Undergrad Did the Big Bang create the most massive black hole in the universe?
- gmmo1971
- · Replies 9 ·
Graduate Gravity bending due to another Gravitational Source
- Philosophaie
- · Replies 1 ·
Graduate Mass to Light Ratio for Dwarf Galaxies
- nik6
- · Replies 4 ·
Beginner Just Joined and Got myself a toy
- rednus6
- · Replies 20 ·
Graduate Proof of the expansion of the universe-cosmological redshift?
- tunafish
- · Replies 8 ·
Graduate State of the Universe before Big Bang
- _shankybro_
- · Replies 28 ·
Hi nice to be in a Universe I understand
- Galron
- · Replies 6 ·
Undergrad How would I go about creating a computer simulation for a Space Elevator?
- EagarToLearn
- · Replies 6 ·
Graduate About some possible theories of the creation of the universe?
- C&L
- · Replies 6 ·
My theory on black holes/Big Bang.
- An Open Mind
- · Replies 8 ·
Graduate Any papers out that show the observed z vs. t?
- BillSaltLake
- · Replies 1 ·
Graduate What exactly is meant by the universe at late times ?
- Ai52487963
- · Replies 1 ·
Graduate Is the exotic environment of a black hole, home to the superforce?
- oseriph
- · Replies 13 ·
Graduate Zero-point energy cancelled by its gravitational energy?
- johne1618
- · Replies 4 ·
Undergrad What happened to stellar astrophysics?
- Simfish
- · Replies 13 ·
Graduate Matter, anti-matter, and singularities
- CannedParadox
- · Replies 4 ·
Graduate Sudarsky's Extrasolar Planet Classification System
- Simfish
- · Replies 1 ·
Undergrad Effect of Moon's Orbital Speed on Frequency of Solar Eclipses
- jdlawlis
- · Replies 10 ·
Graduate Laws of Physics not applicable at the 'moment of creation'?
- JSat92
- · Replies 14 ·
Graduate Pioneer anomaly not gravitational
- Zman
- · Replies 3 ·
Graduate What is the Probability of Existence?
- alvarogz
- · Replies 8 ·
Undergrad From every angle, what is the complete shape of a black hole?
- Astroboy123
- · Replies 7 ·
Stargazing Reflecting telescope principle and model please?
- rasik_35
- · Replies 3 ·
Graduate Reason for Loss of Mas of Planet Mercury
- BadBrain
- · Replies 5 ·
Graduate How Can 96% of the Universe Remain Unobservable?
- Provoker
- · Replies 4 ·
Graduate How would the Big Rip scenario interact with virtual particles?
- Edward Solomo
- · Replies 7 ·
Graduate Dark Energy Explained: A Layman's Perspective
- Havanyani
- · Replies 4 ·
High School Solving Mystery: Bright Star Disappearing in Vrboska, Croatia
- Borek
- · Replies 1 ·
Graduate Is Evacuating the Universe Possible Before Its Inevitable End?
- Dremmer
- · Replies 1 ·
Graduate Is the Universe Truly an Isolated System?
- TrickyDicky
- · Replies 3 ·
Undergrad What elements are present in the sun and how do they form?
- pzona
- · Replies 8 ·
Graduate Calculating the size of the universe?
- Sparky_
- · Replies 11 ·
Undergrad Can a Star Too Small to Go Supernova Still Go Supernova?
- Astroboy123
- · Replies 11 ·
Graduate Steady state state model consistent with Big Bang
- johne1618
- · Replies 2 ·
Graduate Spaceship concepts from The Dream Machines
- cjackson
- · Replies 1 ·
Graduate A question about time and universe expansion
- Geodesic Worm
- · Replies 22 ·
Graduate Forces and factors which act upon masses as they aproach c, and how they do so.
- obamallama
- · Replies 1 ·
Graduate Power transmission through space
- moejoe15
- · Replies 2 ·
Is Colonizing the Sun Possible in the Distant Future?
- Dremmer
- · Replies 16 ·
Graduate How does Heat Death work in a universe with negative curvature?
- Edward Solomo
- · Replies 4 ·
Graduate Finite Universe: Light speed and the Earth's distance/time from event
- rationalist76
- · Replies 6 ·
Graduate Does a Comet Speed Up Near the Sun or Does Time and Space Compress?
- Lord Challen
- · Replies 4 ·
Undergrad Silicon in Space: Robotics Applications Research
- general_ebisu
- · Replies 1 ·
Undergrad Hypothetical question: Meteor hitting Earth
- shezz150
- · Replies 4 ·
Graduate Can We Observe Our Own Galaxy's Development in its Early Stages?
- Edward Solomo
- · Replies 5 ·
Undergrad How do I calculate a planets mass?
- Vetmora
- · Replies 5 ·
Stargazing How to find the Point Spread Function of a Newtonian Telescope?
- Rana13
- · Replies 2 ·
Graduate Latest result for dark energy's equation of state
- bcrowell
- · Replies 10 ·
Astronomy vs Astrology: A Comparison | Physics 191 Book Cover and Side Photo
- 1MileCrash
- · Replies 2 ·
Undergrad Visibility of a solar shade from a planetary surface
- Shaira
- · Replies 14 ·
Graduate Amateur question: isotropy and the cosmologic principle
- lead341
- · Replies 4 ·
Graduate Does the Second Law of Thermodynamics Apply to Cosmology?
- TrickyDicky
- · Replies 27 ·
Graduate Do Hartle-Hawking and Hawking-Turok Models Align with a Flat Universe?
- TheTraceur
- · Replies 1 ·
Graduate Why is Earth made of Iron and Stone?
- zadignose
- · Replies 7 ·
Graduate Will Red Shift Eventually Make Distant Light Unobservable?
- stargazer843
- · Replies 5 ·
Graduate How Do Gravitational Waves Interact with Black Holes and Binary Pulsars?
- jlangdale
- · Replies 4 ·
Graduate Zero-point energy in empty space
- johne1618
- · Replies 1 ·
Graduate A de Sitter like Universe with matter
- johne1618
- · Replies 5 ·
Graduate How would a white light look in a universe where red light is the brightest?
- mikibaici
- · Replies 5 ·
Undergrad Speed of light vs. the universe's inflation
- Trailblzn
- · Replies 5 ·
Undergrad Comparing Angular Rates of Star Rotation at Different Latitudes and Longitudes
- Philosophaie
- · Replies 2 ·
Graduate The Observations of the Dark Flow
- Edward Solomo
- · Replies 4 ·
Graduate Parallel universe attracting galactic clusters
- Naty1
- · Replies 15 ·
Undergrad What is the Iron Mass in the Main Asteroid Belt?
- dBrandon/dC
- · Replies 2 ·
Graduate What fuels Io's volcanic activity?
- shelanachium
- · Replies 17 ·
Graduate Constant Hubble parameter -> accelerating Universe?
- johne1618
- · Replies 4 ·
Undergrad Calculating Orbit Parameters Given Perigee Velocity and Period
- dorai007
- · Replies 3 ·
Undergrad Gravity Decrease in Discs: Rate Explained
- gonegahgah
- · Replies 4 ·
Graduate Proof for the Impossibility of Higher and Lower Dimensions
- T.Calvary
- · Replies 13 ·
Undergrad Project Help - Distribution of AGN in a particular cluster
- navrit
- · Replies 3 ·
High School Is there any limit on how far light can travel -in a vaccuum that is.
- Tregg Smith
- · Replies 5 ·
Undergrad Star density calculation = weird result.
- Adyaphede
- · Replies 2 ·
Undergrad Understanding the Changing Density of the Sun's Core
- Rameesh
- · Replies 2 ·
Graduate How Does Finite Matter from the Big Bang Relate to the Quilted Multiverse?
- daviec
- · Replies 3 ·
Graduate Is there an alternate way to describe the expansion of the universe?
- properman
- · Replies 12 ·
Undergrad Why cant we see the light from the big bang ?
- abueljihad
- · Replies 11 ·
Graduate Foundations of the anthropic principle
- QuArK21343
- · Replies 15 ·
Undergrad What Innovative Astrophysics Project Ideas Can Reflect a Student's Creativity?
- X-rays
- · Replies 5 ·
Undergrad How do nuclear powered space craft generate thrust?
- JLA727
- · Replies 8 ·
Graduate Seeding a Solar System Simulation
- Bane1998
- · Replies 19 ·
Graduate How Do We Get Clear Images of Galaxies Despite the Light Travel Time Difference?
- FelixBiel
- · Replies 12 ·
Graduate The Theory that space has always existed
- Orion_
- · Replies 8 ·
Graduate What is the background density of dark matter?
- BillSaltLake
- · Replies 2 ·
Graduate Brane world with finite thickness
- mersecske
- · Replies 12 ·
High School Calculating the distance of the moon in Newton's day
- bobsmith76
- · Replies 2 ·
Undergrad Speculations and hypotheses about Theia
- Gliese123
- · Replies 2 ·
Graduate Max. rate of expansion of space?
- coyote2
- · Replies 17 ·
Undergrad Waterworlds: A Rarity Among Terrestrial Planets?
- bostonnew
- · Replies 8 ·
Undergrad Why would we ever terraform if we can develop cyborgs?
- bostonnew
- · Replies 16 ·
Graduate Using magnetic fields in place of heat shielding
- FireStorm000
- · Replies 6 ·
Graduate What happened before the big bang?
- Uranium235
- · Replies 23 ·
Graduate Is the Red Square Nebula MWC 922 Really a Hypercube?
- starkind
- · Replies 6 ·
Undergrad When did Gravity Begin? Investigating the Origins of this Fundamental Force
- sonofahbeech
- · Replies 1 ·
Graduate Origin of Universe - Hole with no bottom?
- Government$
- · Replies 49 ·
Graduate Time from big bang / size of universe
- Pjpic
- · Replies 5 ·
Stargazing Why Not Leave Hubble in Space Until It Fails?
- Majo18
- · Replies 2 ·
Graduate Gravitational Lensing or Inferior Mirage?
- 6nqpnw
- · Replies 3 ·
High School Are Phantom Planets Counterbalancing Our Solar System?
- scott_sieger
- · Replies 14 ·
Graduate Instead of a space elevator a well
- brad50
- · Replies 12 ·