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 Rosetta's comet mission discussion thread
- marcus
- · Replies 205 ·
Undergrad Debunking Interstellar Travel: Separating Fact from Fiction
- bugatti79
- · Replies 248 ·
Undergrad Calculating the Rotation Curves of Galactic Disks
- PhotonSSBM
- · Replies 1 ·
High School Methods of accelerating in space?
- MetaUniverse
- · Replies 3 ·
High School How Are Images of Gravity Dips in Space Created Without a Sense of Direction?
- ItchyFungus
- · Replies 37 ·
Undergrad Space expansion and Universe as computation
- ErikZorkin
- · Replies 53 ·
High School Why the Milky Way shows band in all-sky energy scans
- jordankonisky
- · Replies 3 ·
Undergrad Moon's End: What's the Scenario?
- kantincatiskilari
- · Replies 16 ·
Undergrad Is the space elevator affected by lightening, sprites, emf?
- QuestionMark1
- · Replies 3 ·
Undergrad Is the Drake Equation a Reliable Tool for Estimating Extraterrestrial Life?
- Shayne T
- · Replies 2 ·
Graduate Advanced Aliens Are In Happiness Boxes: Why SETI Must Fail
- Jeff Corkern
- · Replies 4 ·
Undergrad What Were Earth's Rotation Rate and Tilt Before and After the Theia Impact?
- anorlunda
- · Replies 2 ·
Graduate Would a larger Martian moon create a stronger magnetic field
- Nick Michaud
- · Replies 3 ·
High School Cosmic horseshoe is not the lucky beacon
- wolram
- · Replies 8 ·
High School Is the universe expanding at an accelerating rate
- wolram
- · Replies 2 ·
Stargazing How do we know how bright a cepheid variable star is?
- Nuff-sed
- · Replies 5 ·
Undergrad Could we detect an intrinsic change in the flow of time?
- substitute materials
- · Replies 42 ·
Undergrad Simulating Binary Systems with RK4 in C
- mastrofoffi
- · Replies 4 ·
High School How could we "reactivate" Mars' magnetic field?
- hxckjxrvxy
- · Replies 8 ·
Stargazing What telescopes are good for seeing planets and galaxies?
- Galactium
- · Replies 10 ·
Undergrad Does spacetime have potential energy?
- IvicaPhysics
- · Replies 3 ·
High School Is supersymmetry a part of string theory
- wolram
- · Replies 7 ·
Graduate Redshift data on stars the same distance from earth
- Jim Hasty
- · Replies 3 ·
High School Marginal evidence for cosmic acceleration
- Greg Bernhardt
- · Replies 7 ·
Graduate Take FFT to find time period for eclipsing binaries
- CassiopeiaA
- · Replies 1 ·
High School Why do areas near the poles experience semidiurnal tides?
- Andreas C
- · Replies 11 ·
High School Is the Cosmic Horizon the Key to Understanding Holographic Reality?
- jacobassett
- · Replies 11 ·
Undergrad Where is the matter in a black hole?
- Green dwarf
- · Replies 83 ·
High School Cold spot still baffles scientists
- wolram
- · Replies 4 ·
High School Prediction: A Red Nova May Rival Polaris in 2022
- CygnusX-1
- · Replies 1 ·
Undergrad Accelerated expansion and Hubble plot
- GTFE
- · Replies 17 ·
High School Observational limit from the super-horizon mode spectrum
- GeorgeDishman
- · Replies 2 ·
High School Terraforming Venus: Why Nobody Discusses It?
- Stephanus
- · Replies 71 ·
High School Sean Carroll on Why Does Time Exist at All?
- Greg Bernhardt
- · Replies 1 ·
Undergrad Question about Relatavistic mass
- DHF
- · Replies 4 ·
Undergrad Largest Hard Planet of Gravity 1g we have ever Discovered?
- greswd
- · Replies 21 ·
High School MARVELS Discovery: 1 Giant Planet & 'Failed Star' Found
- wolram
- · Replies 3 ·
High School Gravitationally bound system in an expanding space
- RMV
- · Replies 11 ·
Undergrad Kepler 3rd law for circular orbits
- Silviu
- · Replies 1 ·
Undergrad Is BAO a standing or moving wave?
- Doctor Strange
- · Replies 2 ·
Undergrad Understanding the curvature parameter k
- throneoo
- · Replies 7 ·
Undergrad Why is Mercury Visible at Night?
- Porsha
- · Replies 18 ·
Graduate How is the red-shift of CMB obtained?
- Doctor Strange
- · Replies 19 ·
Undergrad So we've found the missing "dark matter"?
- fizzy
- · Replies 25 ·
High School Do Stars Experience Precession Like Our Sun?
- newjerseyrunner
- · Replies 1 ·
High School Need confirmation of planetary distances
- Porsha
- · Replies 3 ·
Graduate What is orientation of a needle shaped spacecraft?
- sayebms
- · Replies 30 ·
Undergrad How is the timing of the big bang known
- Pjpic
- · Replies 4 ·
High School Line absorption spectrum and stars
- Clara Chung
- · Replies 9 ·
Graduate What if i do not go into orbit but close in on a langrange p
- HaDeS I
- · Replies 5 ·
Undergrad How to draw figures and diagrams?
- Alexanddros81
- · Replies 8 ·
Insights Is the Universe a Black Hole? - Comments
- Multiple_Authors
- · Replies 6 ·
Undergrad Modeling a Binary Asteroid System Around the Sun
- DistinctlyPlain
- · Replies 1 ·
Undergrad Can dark matter explain Tully-Fisher relation & new paper
- kodama
- · Replies 24 ·
High School Nobel laureate perspective on the history, status and future of GR
- Chronos
- · Replies 22 ·
Undergrad Database of Galaxies and their parameters
- vinven7
- · Replies 3 ·
Stargazing Advanced Astrophotography - Comments
- Andy Resnick
- · Replies 2 ·
Stargazing The James Webb Space Telescope construction
- davenn
- · Replies 31 ·
High School Is a lunar space elevator a realistic proposition?
- Charles Kottler
- · Replies 3 ·
High School What do scientists mean by 'Nothing'?
- Akriel
- · Replies 7 ·
Undergrad Open access papers in JGR-Planets
- CapnGranite
- · Replies 1 ·
Undergrad How can Andromeda collide with the Milky Way?
- Jur van Oerle
- · Replies 4 ·
High School Uranus May Have Two Dark Unseen Moons
- CygnusX-1
- · Replies 2 ·
Undergrad No Boundary Proposal: Overview, Criticisms & Probes
- windy miller
- · Replies 4 ·
High School The aliens are silent because they are dead
- wolram
- · Replies 31 ·
High School What was the curvature of the early universe?
- newjerseyrunner
- · Replies 11 ·
Undergrad Why does this redshift v. light travel time equation work?
- substitute materials
- · Replies 13 ·
High School The news media on 2 trillion galaxies: Confused, or am I?
- OwenR
- · Replies 4 ·
Undergrad Why don't any stars "look" red? red shift
- just wandering
- · Replies 7 ·
Stargazing Intermediate Astrophotography - Comments
- Andy Resnick
- · Replies 2 ·
Undergrad How to Understand the Primordial Power Spectrum in TASI Lectures on Inflation?
- Figaro
- · Replies 12 ·
Undergrad How did Tycho Brahe measure time?
- jaqob
- · Replies 2 ·
High School Why isn't Dark Matter involved in Weak Nuclear reactions during BBN?
- Doctor Strange
- · Replies 6 ·
Graduate How is the duration of BBN calculated?
- Doctor Strange
- · Replies 9 ·
High School The observed spatial distribution of matter
- wolram
- · Replies 12 ·
High School Before Big Bang: What Surrounds the Singularity?
- Mohd Abdullah
- · Replies 11 ·
Undergrad Solar System Origins: Angular Momentum Problem?
- eliot6492
- · Replies 1 ·
Stargazing Seeing Uranus - Two Nights of Celestial Wonders
- Andy Resnick
- · Replies 12 ·
Graduate Finding an exoplanet via its magnetosphere's effect on starlight?
- Gitirana
- · Replies 11 ·
Stargazing Introduction to Astrophotography - Comments
- Andy Resnick
- · Replies 1 ·
Graduate Is the Universe Random or Chaotic?
- Passionate Eng
- · Replies 1 ·
High School Found: The Least Luminous Galaxy Ever Seen
- CygnusX-1
- · Replies 4 ·
High School Gravitational wave signal duration
- jordankonisky
- · Replies 4 ·
Stargazing How can the telescopes take photos of distant galaxies?
- Prog47
- · Replies 6 ·
High School Where is the Void? Universe Big Bang & Expansion
- lhedrick
- · Replies 27 ·
Graduate Types and Common Names of NGC/IC objects
- Philosophaie
- · Replies 3 ·
Graduate Sir Roger Penrose: Challenging Modern Physics Theories
- wolram
- · Replies 34 ·
Undergrad CMB-S4 Science Book: First Edition | The Universe's Secrets
- CapnGranite
- · Replies 1 ·
High School Gravity: Is it Spacetime or Mater-Dependent?
- wolram
- · Replies 4 ·
Stargazing How to build an optical telescope for research?
- Phys12
- · Replies 18 ·
High School Black Holes and The End of Spacetime
- SteveManPhy076
- · Replies 1 ·
High School What percentage of the universe do we know
- Radu Mitroi
- · Replies 6 ·
Undergrad What Causes Distinct Absorption Bands in the Sun's Spectrum During Sunset?
- sophiecentaur
- · Replies 5 ·
High School Space Finite? Inconceivable - Thoughts?
- Mohd Abdullah
- · Replies 1 ·
Graduate How do quantum fluctuations become gravity wells?
- Doctor Strange
- · Replies 11 ·
High School Unusual Exoplanet Discovery Using Star Pulsations: KIC 7917485b
- |Glitch|
- · Replies 3 ·
Undergrad Plotting the orbits of the planets
- Astro Student
- · Replies 2 ·
Undergrad What computer science would you need for astrophysics?
- victorhugo
- · Replies 2 ·
High School Entropy change during the formation and death of stars
- Valli RM
- · Replies 5 ·
Undergrad Gravitational acceleration and the baryon distribution
- member 342489
- · Replies 5 ·