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 impact of life on Earth and its environment?
- korben dallas
- · Replies 20 ·
Graduate Psr b1913+16: Impact of Periastron Epoch Change on Orbital Period Rate
- TrickyDicky
- · Replies 12 ·
Graduate Is the standard model of cosmology unfalsifiable like religion?
- Andrew Mason
- · Replies 22 ·
Graduate If wormholes connect two areas in spacetime, wouldn't that require 5
- Jonnyb42
- · Replies 24 ·
Graduate Friedmann Equation demonstration - Liddle
- go quantum!
- · Replies 1 ·
Graduate Inflaton Field, Cosmological Constants and Spacetime
- rogerl
- · Replies 14 ·
Graduate Mechanism for Gammaray Bursts (computer sim shows neutron star merger works)
- marcus
- · Replies 1 ·
Graduate Can You See a Parallel Universe Through a Black Hole?
- cashflow
- · Replies 8 ·
Undergrad Pyramids = were they pointing at supernova?
- Chaballa
- · Replies 7 ·
High School Why would we detect an undiscovered planet from its gravitational effects?
- Tregg Smith
- · Replies 15 ·
Undergrad Which Textbooks Cover Cosmology and Measuring Cosmic Distances?
- go quantum!
- · Replies 3 ·
Graduate Could anti-mass explain the missing anti-matter from the big bang?
- Fortnum
- · Replies 2 ·
Undergrad Why does the sun emit a continuous spectrum if only hydrogen and helium are present?
- Cantstandit
- · Replies 15 ·
Undergrad Why do we see cosmic microwave background radiation equally in all directions?
- remmeler
- · Replies 17 ·
Undergrad After Supernova: What Happens Next?
- aydinmustafa
- · Replies 5 ·
Graduate Can light escape a black hole's event horizon through tidal forces or cosmic expansion?
- typical guy
- · Replies 6 ·
Graduate Why artificial gravity is not possible?
- wllsrvive
- · Replies 156 ·
Graduate Star and planet formation according to the 2nd Law of Thermodynamics
- mess1n
- · Replies 3 ·
Graduate Creating an Artificial Supernova
- FtlIsAwesome
- · Replies 11 ·
Graduate Understanding Boltzman Equation: Probability of Energy in an Ideal Gas
- shirin
- · Replies 3 ·
Graduate Do Singularities Prove Actual Infinities Exist?
- Matt1128Y
- · Replies 6 ·
Stargazing Will Ultra Advanced Telescopes Enable Real-Time Planetary Surface Imaging?
- stany
- · Replies 3 ·
Undergrad Could a life made of antimatter interact with a life made of matter?
- Dremmer
- · Replies 18 ·
Graduate Is the Hubble Deep Field evidence for inflation in the early universe?
- joeydendron
- · Replies 4 ·
Graduate Are Black Holes Matter Sprinklers?
- Rami.Rom
- · Replies 30 ·
Graduate Energy required to destroy a terrestrial planet or moon
- FtlIsAwesome
- · Replies 16 ·
Stargazing Pleasure of owning a telescope a telescope
- Dr know
- · Replies 2 ·
Graduate Plutonium - the last ironic trace of civilization?
- cph
- · Replies 12 ·
Graduate Is computer simulation the simplest explanation of our universe?
- mistergrinch
- · Replies 4 ·
High School The Universal Gravitational Constant G
- cassiek
- · Replies 2 ·
Graduate What fields have the hardest papers to read?
- Simfish
- · Replies 7 ·
Does the Supermoon Look Different Depending on Geographical Location?
- theitcrowd
- · Replies 9 ·
Graduate Orbital elements within a gravity simulator problem
- CrLf
- · Replies 7 ·
Graduate Milankovitch 100,000 years cycle problem
- Bjarne
- · Replies 10 ·
Graduate Could Heat Radiation Solve the Pioneer Anomaly?
- S.Daedalus
- · Replies 2 ·
Graduate Light speed and time in intergalactic space
- stilotto
- · Replies 2 ·
Undergrad Age of Universe: 13.7B Years & Cosmologist Qs
- Jvonderlinn
- · Replies 15 ·
Graduate Why don't rings spread or coalesce under gravity?
- Phantasia
- · Replies 6 ·
Graduate Why does the black hole preferentially absorb antiparticles in Hawking radiation?
- cbd1
- · Replies 20 ·
Graduate Roger Penrose's Crazy Idea on the Big Bang
- dm4b
- · Replies 8 ·
High School Is our sun part of a star cluster?
- lilythmagebor
- · Replies 5 ·
Graduate Mean Equinox J2000.0: Confirm Ecliptic Plane Intersection
- WildEnergy
- · Replies 1 ·
Graduate How does the universe move beyond PI?
- LeeJeffries
- · Replies 1 ·
Undergrad Do asteroids fuse when they collide in space?
- lilythmagebor
- · Replies 6 ·
Undergrad Question: Normalforce (in the universe)?
- Xcrypt
- · Replies 5 ·
Graduate Neutron Star vs Earth - Effects of a Collision
- kindaroomy
- · Replies 27 ·
Graduate What Do Epoch J2000.0 Orbital Elements Tell Us About Earth's Orbit?
- mattrix
- · Replies 4 ·
Undergrad Measuring Parallax Angle to the Method
- AlchemistK
- · Replies 1 ·
Undergrad Sky seen from a planet orbiting a star in intergalactic void
- FtlIsAwesome
- · Replies 7 ·
Graduate Escape from a black hole with another black hole?
- CosmicVoyager
- · Replies 17 ·
Graduate Radio Astronomy Cold Load Question
- racshot65
- · Replies 2 ·
Graduate Quantum Jitter and 120 Magnitude Prediction
- rogerl
- · Replies 12 ·
Graduate Planck Mission and M-Theory Cosmology
- dm4b
- · Replies 5 ·
Graduate CMB Radiation from Big Bang? Why not dark energy?
- ericosg
- · Replies 7 ·
Graduate The Incredible Advances in Cosmology of the Last Decade
- Tanelorn
- · Replies 8 ·
Undergrad Introduction and Questions about Asteroid Belt/Jovians
- redwood973
- · Replies 6 ·
Graduate Can Moons and Exoplanets Have Ring Systems?
- FtlIsAwesome
- · Replies 3 ·
Undergrad Why are orbits elliptical rather than circular?
- JulianBoolean
- · Replies 8 ·
Undergrad How quickly did American researchers get data from Soviet probes like Venera?
- Simfish
- · Replies 1 ·
Undergrad How is the age of the universe calculated across different reference frames?
- henryc09
- · Replies 7 ·
High School Why Does the Milky Way Appear as a Streak in the Night Sky?
- racshot65
- · Replies 5 ·
Undergrad Low density bubble in Hubble expansion article
- dubsed
- · Replies 1 ·
Undergrad How Are Nebular Images Composed?
- shaggywolfhou
- · Replies 2 ·
Undergrad Converting supervoid sizes from megaparsecs to light years
- Moloch11
- · Replies 2 ·
Undergrad What force triggered the Big Bang singularity to expand?
- filegraphy
- · Replies 10 ·
Undergrad Approximating Ellipse Orbits with Newton's Law
- Chetic
- · Replies 6 ·
High School How did moluculair oxygen devoleped on Mercury?
- 2ossy
- · Replies 7 ·
Undergrad What Was the Initial Size of the Big Bang?
- rogerl
- · Replies 1 ·
Graduate Is 13 Billion Years Enough for Carbon Abundance in the Universe?
- TrickyDicky
- · Replies 10 ·
Graduate Could redshift be from cooler stars rather than cosmic expansion?
- CuriousBobby
- · Replies 5 ·
Undergrad Expansion of the Universe: Is There a Way to Tell?
- Darken-Sol
- · Replies 5 ·
Undergrad Why Don't Jet Airplanes Heat Up Like Probes Re-entering Earth's Atmosphere?
- cj
- · Replies 10 ·
Graduate A question for people smarter than myself 8)
- PeterReynolds
- · Replies 15 ·
Graduate Relativistic Mass and high relative Velocity of distant galaxies
- Tanelorn
- · Replies 22 ·
Graduate How Do Supernovae Lead to Black Hole Formation?
- Drakkith
- · Replies 2 ·
Graduate Is it Possible to Escape a Black Hole?
- soothsayer
- · Replies 21 ·
Undergrad Why do the lowest tides follow the full moon by a few days?
- sea slug
- · Replies 9 ·
Graduate Space time is not phisical object
- menniandscience
- · Replies 25 ·
Undergrad Instant communication between great distances?
- dollarbill220
- · Replies 4 ·
Undergrad Jovian planet with breathable oxygen atmosphere.
- FtlIsAwesome
- · Replies 30 ·
Graduate Program for Supernova Data Fitting
- micomaco86572
- · Replies 3 ·
Graduate Could we be living in a black hole?
- Chen
- · Replies 19 ·
Graduate Taking issue with random walk of photon in star
- FourierFaux
- · Replies 22 ·
Graduate Does expansion of spacetime also stretch amplitude of light waves?
- SteveinLondon
- · Replies 3 ·
Graduate Does the Universe Have an Edge or Boundary?
- arroy_0205
- · Replies 5 ·
Graduate What is the truth about radiation pressure in stars?
- Ken G
- · Replies 43 ·
Graduate Phase-Space volume V - Roger Penrose
- bobsmith76
- · Replies 2 ·
Graduate Do redshifts really indicate expansion of the universe?
- Lino
- · Replies 35 ·
Graduate My conversion with someone regarding cosmology, conclusion included
- Baroque
- · Replies 3 ·
Graduate Can a 12-year-old's theory challenge the Big Bang?
- Museigen
- · Replies 3 ·
Graduate Did space and time exist before the Big Bang?
- Parbat
- · Replies 81 ·
Graduate Is BEC still considered a viable dark matter candidate.
- petergreat
- · Replies 2 ·
Graduate Equation of state for electron degenerate matter
- aleazk
- · Replies 1 ·
Graduate Static spacetime as static universe
- johank
- · Replies 7 ·
Undergrad Queston about the darkness of the universe
- phinds
- · Replies 10 ·
Graduate Do the conditions created by the LHC accurartely simulate the big bang?
- BernieM
- · Replies 6 ·
High School Is Cosmology the Same as Cosmic Rays?
- welatiger
- · Replies 2 ·
Graduate Is Dimensionality Frame-Dependent in Spacetime Theories?
- J.F.
- · Replies 2 ·
Graduate Galaxies travelling away from each other faster than light
- Tombo254
- · Replies 5 ·
Graduate Black holes can be characterized by their event horizons.
- NOHK2710
- · Replies 1 ·