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
Undergrad Convert to "Of Date" Apparent coordinates from "J2000" coordinates
- Philosophaie
- · Replies 1 ·
Undergrad What is the similarity between the spectra of white dwarfs and the sun?
- MMS
- · Replies 6 ·
Graduate Astronomical Implications of Quantum Entanglement?
- secur
- · Replies 4 ·
High School Day-related calculations for BC dates
- James Bejon
- · Replies 7 ·
Undergrad VR/AR big bang model (Virtual Reality Simulation)
- Toxis
- · Replies 4 ·
High School Gas Giants & Stars: Do They Have a Solid Part?
- Allen_Wolf
- · Replies 5 ·
High School What Are the Latest Insights on CMB Anomalies from Ali Frolop and Douglas Scott?
- Garth
- · Replies 1 ·
Undergrad Does the Sun's Movement Create a Solar System Vortex Motion?
- Shazamuel89
- · Replies 1 ·
High School Why does light not have infinite mass?
- Allen_Wolf
- · Replies 8 ·
Graduate What distance is used in Hubble's Law.
- Javier Chornet
- · Replies 4 ·
High School Tidally Locked Planets: How Close to the Star?
- AstroCody
- · Replies 2 ·
High School What Is the Lifespan of a Neutron Star?
- dendros
- · Replies 19 ·
Undergrad Dark Era of the Universe: Is it Really Dark?
- jordankonisky
- · Replies 2 ·
Undergrad Does the Universe's Expansion lead to Critical Mass < 1?
- HappyMonster3000
- · Replies 2 ·
Undergrad What's Next for Astrogeology and Planetary Sciences?
- pioneerboy
- · Replies 3 ·
High School What Are Common Misunderstandings About the Big Bang Theory?
- Alltimegreat1
- · Replies 19 ·
Undergrad Universe from Nothing: Cosmological Theory Explained
- Narasoma
- · Replies 28 ·
Stargazing Amateurs Discover Asteroid Impacting Jupiter
- russ_watters
- · Replies 4 ·
Undergrad Could "dark matter" be regions where Lambda is lower?
- Gerinski
- · Replies 2 ·
High School How Much Do Astronauts Age at Light Speed on a 50-Light-Year Journey?
- Alltimegreat1
- · Replies 22 ·
High School Why Does Free Space Permittivity Have Its Specific Value?
- Shubham135
- · Replies 1 ·
High School Is the Earth the centre of the universe?
- Stuart21
- · Replies 24 ·
Graduate Do Large Galaxies Exist Without Central Supermassive Black Holes?
- secur
- · Replies 1 ·
High School What would be the minimum size for a galaxy to have a disk form?
- Adraasa Kynuei
- · Replies 1 ·
Undergrad What happens to light when it reaches the edge of the universe?
- fbsthreads
- · Replies 95 ·
High School Planet/Dwarf Planet Classification - Regarding Rogue Bodies
- Madi Araly
- · Replies 11 ·
Undergrad Can Dark Matter just be vacuum fluctuations?
- bbbl67
- · Replies 6 ·
Undergrad Thought experiment: Communication beyond the particle horizon
- Lanniakea
- · Replies 1 ·
Undergrad Calculated solar irradiation not matching up with measured
- KarenRei
- · Replies 1 ·
High School Final Temperature of the Universe: Effects of Dark Energy and Spatial Curvature
- wolram
- · Replies 16 ·
High School Could redshift be caused by time speeding up?
- paulharter
- · Replies 11 ·
High School Is Space Infinite? Examining the Big Bang Theory and the Curvature of Spacetime
- arupel
- · Replies 3 ·
Undergrad "Dark energy" may be nothing more than baseline curvature
- marcus
- · Replies 51 ·
High School How Did the God Particle Explode to Create Our Universe?
- Docscientist
- · Replies 10 ·
Undergrad Hypersphere mock-ups for educational purposes
- Spourk
- · Replies 7 ·
High School Discover the Phenomenon of One New Star Every Hour: Science Daily"
- wolram
- · Replies 1 ·
High School Why is the CMB relatively uniform?
- hewiiitt-
- · Replies 5 ·
High School How was the KSN 2011d Supernova Detected?
- Greg Bernhardt
- · Replies 4 ·
Undergrad Lift-off of ExoMars mission to find life on Red Planet
- arist
- · Replies 4 ·
Undergrad CMB Radiation Q: Can It Be Detected from 42 Million Light Years?
- gluon
- · Replies 11 ·
Stargazing Diameter of Charles Messier's Telescope
- AstroCody
- · Replies 6 ·
Undergrad Are almost all stars in the night sky brighter than the Sun?
- wolf1728
- · Replies 40 ·
High School Effect of Density and Geometry on Gravity and Luminosity
- townfool
- · Replies 25 ·
High School How come black holes have a mass?
- Dhaga
- · Replies 6 ·
High School Why isn't water on the ISS dangerous?
- Zarhult
- · Replies 3 ·
Undergrad Cosmology Large Angular Scale Surveyor
- Buzz Bloom
- · Replies 2 ·
Undergrad Dark Matter Detection Experiment Results?
- secur
- · Replies 6 ·
Undergrad Does The LCDM Model need reworking?
- Berenices
- · Replies 20 ·
Undergrad Direction of stars' orbits around galactic center
- Alltimegreat1
- · Replies 1 ·
High School Why Does LIGO Only Detect the Famous 'Chirp' Pulse from Black Hole Mergers?
- houlahound
- · Replies 8 ·
Undergrad Binary system of a neutron star with a black hole
- Stella.Physics
- · Replies 2 ·
Graduate Solar drive / neutron atmosphere
- synch
- · Replies 5 ·
Graduate What is the solution to the black hole information paradox?
- wolram
- · Replies 2 ·
Ceres' bright spots seen in striking new detail
- PF_SpaceNews
- · Replies 4 ·
High School Challenge to humanity to see beyond and further than the CMS
- Elbert Anstein
- · Replies 3 ·
High School Pulsars and Neutron Stars debunked?
- Elbert Anstein
- · Replies 4 ·
Undergrad Asymmetric Tensor: Definition & Examples
- izzi wekwek
- · Replies 1 ·
High School How does the cosmic background radiation help us measure expansion in cosmology?
- thetexan
- · Replies 4 ·
High School Gravity at the Core of the Sun: How Strong is it?
- Kingpin1880
- · Replies 4 ·
Undergrad How to Convert Plummer Distribution of Stars Parameters into Standard Units?
- jimbo007
- · Replies 1 ·
Undergrad Could Planets Have Dual Cores Similar to Cell Structures?
- STC4476
- · Replies 1 ·
Stargazing How to measure a magnifying glass (I want to build a telescope)
- Avijit Palit
- · Replies 2 ·
High School How is the characteristic age of pulsars typically calculated?
- rnielsen25
- · Replies 2 ·
High School Is the Expansion Rate Truly Accelerating?
- thetexan
- · Replies 1 ·
Undergrad Dark energy and the gravitational constant
- windy miller
- · Replies 1 ·
Undergrad Detecting organic compounds in interstellar dust
- Prez Cannady
- · Replies 2 ·
High School Orbit Likelihood: The Odds of Objects Falling into Stable Orbits Explained
- Alltimegreat1
- · Replies 2 ·
Undergrad Monopole Creation and Higgs Field
- expos4ever
- · Replies 1 ·
Stargazing Calculating a Telescope's Limiting Magnitude
- Ishtar_UK
- · Replies 3 ·
High School Why not the sun revolves around the Earth?
- hackhard
- · Replies 11 ·
Undergrad Can Energy Naturally Convert to Matter in the Universe?
- momo666
- · Replies 21 ·
Stargazing Setting up first telescope - need advice
- Brek
- · Replies 9 ·
High School How Will Scott Kelly's Space Radiation Exposure Affect His Health?
- Greg Bernhardt
- · Replies 10 ·
High School How Was the Binary Black Hole Collision Predicted?
- gianeshwar
- · Replies 10 ·
High School How far outward can we rule out intelligent life?
- Alltimegreat1
- · Replies 94 ·
Stargazing Receding Galaxies and the Range of Gravity
- MCoulson
- · Replies 15 ·
High School Understanding the Flat Geometry and Curvature of the Universe
- Alltimegreat1
- · Replies 11 ·
Undergrad Is the following a smaller version of dark energy?
- Mike Templeton
- · Replies 12 ·
High School Are Lunar Phases Affected by Earth's Orbit and Rotation?
- Zarhult
- · Replies 6 ·
Undergrad How to calculate kinematic distances in the Milky Way
- Ben231111
- · Replies 1 ·
Undergrad How to determine an asteroid survey efficiency?
- pioneerboy
- · Replies 4 ·
High School Black Holes and Degenerate Pressure
- lavinia
- · Replies 5 ·
Undergrad Current views on what happens at largest and smallest scales
- Tanelorn
- · Replies 15 ·
High School Trying to understand the Andromeda-Milky Way collision
- Alltimegreat1
- · Replies 9 ·
High School If the Earth stopped spinning? (orbiting the Sun)
- avito009
- · Replies 17 ·
High School Does a Star's Fuel Running Out Lead to a Black Hole or Stellar Plasma?
- Arceus74
- · Replies 35 ·
High School What do you see at the edge of the universe?
- thetexan
- · Replies 3 ·
High School Can a black hole reach equilibrium between accretion and Hawking radiation?
- wolram
- · Replies 5 ·
Graduate Can We Create a Magnetic Field on Mars through Moon Formation?
- tanzanos
- · Replies 44 ·
Undergrad Rotation curve of galaxy Keplerian method
- Shailesh Pincha
- · Replies 4 ·
Undergrad Extinct Curium 247 Found in Meteors
- snorkack
- · Replies 3 ·
High School Hubble breaks the distance record with a redshift of 11.1
- Tanelorn
- · Replies 3 ·
Undergrad Deriving the second Friedman equation from the first.
- thebiggerbang
- · Replies 2 ·
Undergrad Early Earth: A Rapid Spin Through History
- Buzz Bloom
- · Replies 10 ·
Undergrad Plausibility of high density rocky planets
- SammiEmN
- · Replies 9 ·
Graduate How Do Black Holes Affect Time and the Fate of the Universe?
- Sei
- · Replies 2 ·
High School Will super symmetry become part of cosmology
- wolram
- · Replies 1 ·
Graduate Degeneracy pressure and stellar collapse
- backward
- · Replies 2 ·
Graduate Is Detecting Distant Asteroids/NEOs from the ISS Possible?
- ErdosFan
- · Replies 8 ·
High School Intergalactic Stars: Are There Single Stars Between Galaxies?
- thetexan
- · Replies 21 ·