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
Stargazing Is this USB eyepiece camera a lemon?
- DaveC426913
- · Replies 26 ·
Undergrad Accelerating Universe and spherical distribution of matter
- Ranku
- · Replies 9 ·
High School Meteor Photographed by Accident: Spectacular Green Bolide
- swampwiz
- · Replies 11 ·
High School Did the Big Bang expand faster than light?
- brajesh
- · Replies 26 ·
High School Can We See Beyond the Voids in Our Universe?
- David Fosco
- · Replies 14 ·
High School Creation and distribution of elements - looking for recommendations
- BWV
- · Replies 2 ·
Undergrad Was the Ancient Universe More Compact Between 12,000 BC and 400 BC?
- ASTRA225o4
- · Replies 9 ·
High School Are Most Star Systems Composed Mainly of Light Elements?
- David Fosco
- · Replies 3 ·
High School Will You Capture Jupiter and Saturn's Historic Conjunction?
- fresh_42
- · Replies 28 ·
High School Earth & Moon Gravity Gradient: Investigating Its Impact
- artriant
- · Replies 33 ·
Graduate What is the jerk parameter in terms of the Density parameters?
- Arman777
- · Replies 1 ·
Undergrad Infrared energy flux from the Moon
- Incnis Mrsi
- · Replies 7 ·
High School The infinite and the infinitesimal
- Tanelorn
- · Replies 10 ·
Undergrad How Does Space Travel Affect Natural Aging?
- redferry
- · Replies 4 ·
High School An interesting consequence of the closedness of the Cosmos
- bayakiv
- · Replies 13 ·
Graduate Black Holes Formalism: Overview of Misner Sharp Mass
- AHSAN MUJTABA
- · Replies 13 ·
High School How can dark energy comprise 74% of the Universe?
- Quotidian
- · Replies 36 ·
Undergrad Is Scale Factor Continuity and Differentiability Necessary?
- Arman777
- · Replies 6 ·
High School Nature: "A massive white-dwarf merger product before final collapse"
- tovisonnenberg
- · Replies 1 ·
High School Are subspaces of Hilbert space real?
- Jaycurious
- · Replies 7 ·
Undergrad Laws of physics from initial conditions?
- Suekdccia
- · Replies 5 ·
Undergrad Transparency of a gas compared to a plasma
- Herbascious J
- · Replies 18 ·
High School Can iron form via processes like the r- or s-process?
- Teichii492
- · Replies 5 ·
Undergrad Is there any inflationary model without a fundamental theory?
- Suekdccia
- · Replies 2 ·
High School Where do the electrons go? (in stellar nuclear fusion)
- Thies_Kohl
- · Replies 4 ·
Undergrad Gravitational lensing: deriving magnification of lensed image
- astrostudent21
- · Replies 2 ·
High School Snapped Cable Damages Arecibo Observatory Radio Telescope
- hutchphd
- · Replies 5 ·
Undergrad How is Adaptive Optics Revolutionizing Our Understanding of the Galactic Center?
- fresh_42
- · Replies 1 ·
Stargazing What do stars actually look like from up close?
- Nathi ORea
- · Replies 2 ·
High School Question about things moving through outer space
- Sundown444
- · Replies 27 ·
Undergrad Blackbody colour of metals versus stars
- Nathi ORea
- · Replies 27 ·
Undergrad What are the Characteristics of a Perfect Meteorite?
- davenn
- · Replies 17 ·
Undergrad Is there a Friedmann equation form with inflation?
- Buzz Bloom
- · Replies 2 ·
Undergrad Matter leaving a spinning galaxy
- Ranku
- · Replies 13 ·
Undergrad Astronomy in a Simple Solar System
- saddlestone-man
- · Replies 122 ·
High School Question about Planck's Function
- tovisonnenberg
- · Replies 1 ·
Undergrad Could Planck Stars Explain Black Hole Bounce and Resolve Physics Paradoxes?
- junjunjun233
- · Replies 1 ·
Graduate What is a dynamic spectrum measurement?
- TheCanadian
- · Replies 1 ·
Graduate Is the Universe Undergoing an Infinite Series of Expansions and Contractions?
- ranyart
- · Replies 1 ·
Graduate How to calculate Helium lensing
- Jon Richfield
- · Replies 1 ·
High School What causes orbits to be inclined?
- Dreksler
- · Replies 5 ·
High School Did the Big Bang follow multiple bangs? How did matter come to collide?
- Nick Levinson
- · Replies 43 ·
High School Does Jupiter have an angular momentum problem?
- Brian Turner
- · Replies 23 ·
Undergrad Some questions about absorption lines
- PainterGuy
- · Replies 4 ·
Undergrad Change law of gravitation to remove dark energy and dark matter
- Alain De Vos
- · Replies 13 ·
High School Question about the s-process and r-process in stellar evolution
- TheCelt
- · Replies 11 ·
Undergrad At what wavelength do we observe ionized gas?
- Mikkel
- · Replies 1 ·
High School Nervous about James Webb Space Telescope?
- Maximum7
- · Replies 23 ·
Undergrad Can a Tube Launch System Harness Atmospheric Energy to Reach Space?
- TommyThompson
- · Replies 34 ·
High School Pair Instability Supernovae & Electron Capture Supernovae
- tovisonnenberg
- · Replies 2 ·
High School Earth's Hubble velocity and measuring Hubble at large distances
- Nick Levinson
- · Replies 5 ·
Undergrad Contradictory Cosmological Values: Crisis for Cosmology?
- Buzz Bloom
- · Replies 14 ·
High School Help in explaining a question on gravity
- trees and plants
- · Replies 7 ·
Undergrad Do we first determine the gravity or density of a celestial object?
- Dreksler
- · Replies 1 ·
High School Star at black hole event horizon
- BWV
- · Replies 8 ·
Graduate Orbital shutter as a beacon for interstellar communication
- VACUUMIST
- · Replies 4 ·
Graduate How you add gauge groups to spacetime
- Haelfix
- · Replies 2 ·
High School The composition of interstellar dust
- ChinleShale
- · Replies 11 ·
Undergrad Acquiring a Small Dataset of a pulsar signal
- koroshii
- · Replies 3 ·
Undergrad Determining Relative Position of Space Object to Earth
- Py3_3
- · Replies 3 ·
Undergrad What is the best current value for Omega_r?
- Buzz Bloom
- · Replies 22 ·
Graduate An article on Big Bang theory contradictions
- ChrisVer
- · Replies 3 ·
Undergrad Question about spacetime singularities
- trees and plants
- · Replies 1 ·
High School How does the cosmological constant affect gravitational collapse?
- Cerenkov
- · Replies 2 ·
High School Why is Carbon considered volatile?
- Qshadow
- · Replies 5 ·
High School Dark matter interactions other than gravity
- jake jot
- · Replies 12 ·
Undergrad Fast Radio Bursts (FBR) detected in our own Galaxy
- Tom.G
- · Replies 7 ·
The International Space Station as a Human Abode
- BillTre
- · Replies 1 ·
Undergrad Cosmology Comoving coordinates and observers
- AHSAN MUJTABA
- · Replies 4 ·
High School NASA discovers water on the moon
- Greg Bernhardt
- · Replies 21 ·
Undergrad Demonstration of comoving volume between 2 redshifts
- fab13
- · Replies 59 ·
Undergrad Big Crunch and the Universe's shape
- LCSphysicist
- · Replies 1 ·
Undergrad In the Universe do straight lines exist?
- LightningInAJar
- · Replies 24 ·
Graduate Average of the power spectrum of Poisson noise
- arcTomato
- · Replies 1 ·
Undergrad Fourier Series and Cepheid Variables
- no_drama_llama_77
- · Replies 40 ·
Undergrad Shape of Dark Matter Halos & Visible Matter Angular Momentum
- Ranku
- · Replies 3 ·
Undergrad How does the Singularity produce all the diverse matter in the universe?
- shushi_boi
- · Replies 9 ·
High School How does the observable Universe have meaning?
- allisrelative
- · Replies 25 ·
Undergrad Does Hawking Radiation Cause Black Holes to Evaporate?
- Robert Friz
- · Replies 24 ·
Undergrad What Mechanism Creates the Jet Emanating From a Quasar?
- Robert Friz
- · Replies 26 ·
Undergrad Earth's Rotation & Orbit: Effects on Space Objects?
- timeuser84
- · Replies 1 ·
Undergrad Can Alfvén waves be observed on a stellar spectrum using amateur equipment?
- Getterdog
- · Replies 1 ·
Closed vs. Open Crawlspace & Automatic Vents vs. Dehumidifer?
- kyphysics
- · Replies 10 ·
Graduate Biological Agent Phosphine Found on Venus
- Greg Bernhardt
- · Replies 54 ·
High School New theory of the early Universe
- windy miller
- · Replies 1 ·
Undergrad Book to study the big bang theory
- LCSphysicist
- · Replies 1 ·
Undergrad Number of known asteroids reaches 1 million
- mfb
- · Replies 10 ·
Undergrad Huge Hole Found in the Universe
- Buzz Bloom
- · Replies 38 ·
Stargazing What are some good beginner telescopes for under £100?
- Zoiona
- · Replies 11 ·
Graduate Efficiency of a heat engine in space
- phyzguy
- · Replies 4 ·
High School Question about calculating the density of the Universe
- tovisonnenberg
- · Replies 2 ·
High School Difference between an Einstein frame and a String frame?
- windy miller
- · Replies 4 ·
Graduate BGV-theorem and Penrose's Conformal Cyclic Cosmology
- haushofer
- · Replies 5 ·
Undergrad How fast do galaxies 1 billion light-years away move away from us?
- Dreksler
- · Replies 2 ·
Undergrad Q: Volume of the largest ellipsoid in space which contains no stars?
- Buzz Bloom
- · Replies 2 ·
Undergrad Schwartzchild radius and the Big Bang
- saltburnman
- · Replies 13 ·
Undergrad What happens to a small star after burning all of its fuel?
- kelly0303
- · Replies 3 ·
High School Some historic remarks on astrometry by Terence Tao
- fresh_42
- · Replies 2 ·
Undergrad IRAS Filter Profile: Computing ##\lambda_{mean}##
- tryingtolearn1
- · Replies 4 ·
Undergrad Reason for matter rather than antimatter?
- jcap
- · Replies 4 ·