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 Light fluctuations and finding exoplanets
- Paul Colby
- · Replies 3 ·
Undergrad Would Heat Death overcome Strong Nuclear Force?
- Gerinski
- · Replies 12 ·
High School Combine a horizon line with expansion
- newjerseyrunner
- · Replies 3 ·
Undergrad Is something pulling our universe?
- Plup
- · Replies 5 ·
High School Shapes and gravitational radiation
- wolram
- · Replies 5 ·
Undergrad Gravitating particles and entropy
- Student100
- · Replies 16 ·
High School Coordinated galactic bangs instead of big bang
- Wolfgang Konle
- · Replies 2 ·
Undergrad How would dark matter aggregate?
- haruspex
- · Replies 69 ·
High School Unsolved Mystery: Where Do These X-Rays Come From?
- wolram
- · Replies 4 ·
Graduate How do we explain universal complexities?
- Timedial
- · Replies 37 ·
High School When to see aurora borealis in Lincoln, NE?
- aheight
- · Replies 5 ·
Undergrad Average size of the biggest G-bound structures in the Universe
- tzimie
- · Replies 1 ·
High School 'Strong signal' from sun-like star sparks alien speculation
- Garth
- · Replies 32 ·
High School Does water pressure decrease in zero gravity?
- allister109
- · Replies 13 ·
Undergrad Lunar versus Solar orbit at solstices
- grisly
- · Replies 2 ·
Undergrad Need help with some calculations with gravitational waves
- Meerio
- · Replies 4 ·
Graduate New Radial Velocity Experiment (RAVE) Data Release
- patmurris
- · Replies 2 ·
Undergrad What would a universe look like if it had 2 time dimensions?
- Mathijsgri
- · Replies 5 ·
High School What do you think of the "Now Hypothesis"?
- Hunter235711
- · Replies 1 ·
Graduate Did the LUX Dark Matter Experiment Fail to Detect Dark Matter?
- Garth
- · Replies 93 ·
Graduate How much energy to fly Spaceships from sci -fi movies
- Yolanda2016
- · Replies 1 ·
High School Graph of rotation curve of a cluster (not a galaxy)
- Buckethead
- · Replies 5 ·
High School Astrophysics Science Fair Project Ideas?
- astro_chara
- · Replies 1 ·
Graduate Motivation behind the theory of cosmological perturbations
- spaghetti3451
- · Replies 19 ·
Undergrad What's the feasibility of space mining companies?
- ramzerimar
- · Replies 29 ·
Graduate Quantum fluctuations in early universe
- spaghetti3451
- · Replies 3 ·
High School What is the initial temperature of the Big Bang?
- wolram
- · Replies 9 ·
Graduate Photon densities within galtactic disc compared to CMB
- UHECRon
- · Replies 4 ·
High School Delta-v for orbit if already at ideal velocity and altitude?
- Treva31
- · Replies 7 ·
Stargazing H.E.S.S. gamma ray telescope got an image of the moon
- Noduagga
- · Replies 4 ·
Undergrad Why are stars grouped in galaxies?
- TheDoctor46
- · Replies 2 ·
High School Unraveling the Mystery of Hydrogen Times Pi Frequency
- Stephanus
- · Replies 20 ·
Undergrad How to Calculate Longitude and Latitude Speed from Cartesian Values?
- cptolemy
- · Replies 1 ·
Stargazing Amateur Astrography: Stitching Together Large Fields of View
- Andy Resnick
- · Replies 2 ·
Undergrad Planetary Orbits in AU - Stability & Mass Limits
- QuantumPowered
- · Replies 8 ·
High School Explaining the Color Variations of Main Sequence Stars
- jordankonisky
- · Replies 6 ·
Stargazing Can a Planet Have Multiple Moons with Unique Orbital Patterns?
- Lymsleia
- · Replies 4 ·
High School Aerogel comet particle capture experiment?
- houlahound
- · Replies 7 ·
Insights A Poor Man's CMB Primer. Part 4: Cosmic Acoustics - Comments
- bapowell
- · Replies 1 ·
High School What is the total size of the Asteroid Belt in kilometers?
- eurus
- · Replies 13 ·
High School Simulating orbit trajectory based on position and velocity
- AlenC
- · Replies 14 ·
Undergrad Does LQC Resolve the Information Paradox Without Complementarity?
- windy miller
- · Replies 14 ·
High School What came first, matter or energy?
- Aaron1947
- · Replies 35 ·
Graduate Can Time Scale Change Analogously to Spatial Expansion?
- TheCanadian
- · Replies 1 ·
Undergrad What is the average number of planets per star?
- Abdul.119
- · Replies 3 ·
High School Fact check: Planetary collisions
- Noisy Rhysling
- · Replies 16 ·
Undergrad Spacetime and effects of being super close to the Sun
- Justawildwonder
- · Replies 16 ·
Stargazing Processor power for entry level Astrophotography
- sophiecentaur
- · Replies 33 ·
Undergrad Scale invariance in the power spectrum
- windy miller
- · Replies 3 ·
High School Can Non-Rigid Spacesuits Provide Adequate Protection for Space Travel?
- GTOM
- · Replies 2 ·
High School Capturing a distant planet's light
- Greg Bernhardt
- · Replies 5 ·
Graduate Newtonian theory of cosmological perturbations
- spaghetti3451
- · Replies 6 ·
Graduate Cosmological perturbations in homogeneous and isotropic spac
- spaghetti3451
- · Replies 3 ·
Stargazing GAIA - 1 billion stars and counting
- Borg
- · Replies 9 ·
Graduate Can black holes convert matter/dark matter?
- Khashishi
- · Replies 7 ·
High School Regression of Universe: Is Time Repeatable?
- petrushkagoogol
- · Replies 2 ·
Undergrad How to determine a planet's size given gravity
- ckirmser
- · Replies 8 ·
Undergrad How does the expansion of space affect the age of the universe?
- yazanhomsi
- · Replies 25 ·
Graduate Exploring the Pauli Exclusion Principle and Black Holes
- Alfred Cann
- · Replies 14 ·
High School Why is planet X always depicted as being blue?
- Tris Fray Potter
- · Replies 3 ·
Undergrad How to derive full solar sprectrum from gamma rays
- jordankonisky
- · Replies 16 ·
High School Van Allen Belt "mirror points"-- How do these work?
- Chris Frisella
- · Replies 2 ·
Undergrad Intergalactic Space: Time, Radiation & Distance
- Greta
- · Replies 5 ·
High School What is the significance of the spooky alignment among quasars?
- wolram
- · Replies 2 ·
Graduate Gravitational Lensing: Einstein's Blue Run Mystery
- Oscar01
- · Replies 16 ·
Undergrad How can I find journals about this discovery?
- Abdul.119
- · Replies 2 ·
Undergrad Can Gravitational Lensing Be Caused by Refraction?
- Oscar01
- · Replies 17 ·
High School Are There Really Hundreds of Black Holes in NGC 6101?
- wolram
- · Replies 4 ·
High School Why Quantum loop or string theory
- wolram
- · Replies 26 ·
High School Do we currently have interstellar com capabilities?
- newjerseyrunner
- · Replies 1 ·
Undergrad Is there a point during star formation when gas is 1 atm?
- Artlav
- · Replies 19 ·
High School Very close asteroid pass in a few hours
- tony873004
- · Replies 1 ·
High School How do stars orbit the center of the Milky Way?
- Irfan Nafi
- · Replies 7 ·
High School Gold Synthesis in Supernovae: What Form Does It Take and Under What Conditions?
- tionis
- · Replies 8 ·
Undergrad How Big is a Planet with a 5000mph Rotation and a 52-Hour Day?
- Amber_smith
- · Replies 5 ·
High School When Did the First Stars in the Universe Form?
- wolram
- · Replies 3 ·
High School What kind of supernova do binary neutron stars produce?
- Irfan Nafi
- · Replies 3 ·
High School Why Do Stars Show Both Emission and Absorption Spectra?
- Nishantkumar19
- · Replies 3 ·
Undergrad Calculating distance, object speed, etc - RE:Falcon9
- InquiringMindaloo
- · Replies 7 ·
Undergrad If radiowaves are reflected from objects (i.e planets)....
- Noduagga
- · Replies 5 ·
Undergrad Difference between omega 0 and omega k
- windy miller
- · Replies 4 ·
Undergrad Is an integral over phase space reasonable?
- Hyla Brook
- · Replies 17 ·
High School View Zodiacal Light Before Morning Twilight - Prime Season Now!
- jim mcnamara
- · Replies 1 ·
Undergrad Early opaque universe - why little proton-photon scattering?
- Lapidus
- · Replies 4 ·
High School Solar Energy at Mars: How Much Can Be Produced?
- Allen_Wolf
- · Replies 1 ·
High School Can we know what exists in planets' subsurfaces?
- Noduagga
- · Replies 13 ·
Stargazing The Pleiades: an underrated glory of the night sky
- sophiecentaur
- · Replies 9 ·
High School Could dark matter be regular matter?
- kolleamm
- · Replies 5 ·
High School What is the next step in cosmology
- wolram
- · Replies 1 ·
Undergrad Hawking Radiation: Explaining the Evaporation Effect
- thetexan
- · Replies 6 ·
Graduate What Lies Between the CMB and the First Stars?
- Gerinski
- · Replies 37 ·
Stargazing How Does Hubble's Field of View Compare to Amateur Telescopes?
- jordankonisky
- · Replies 2 ·
Undergrad Trying to solve the restricted two-body problem
- tomwilliam2
- · Replies 4 ·
Stargazing Kepler Telescope Views Single Point in Space 4.2ly Away
- bill ginger
- · Replies 15 ·
Graduate Shape of the Universe: Is it Infinite or Finite?
- arupel
- · Replies 39 ·
Undergrad Constants of nature in the early universe
- windy miller
- · Replies 5 ·
Undergrad Are Cosmic Rays Intensifying Across the Globe?
- Dotini
- · Replies 4 ·
Undergrad Why does hawking radiation in black holes slowly increase?
- victorhugo
- · Replies 3 ·
Undergrad Moon revolution period 27.32, but got 27.53 from equation?
- cnnn
- · Replies 2 ·
Undergrad If the observable universe was visible to the naked eye....
- rollete
- · Replies 23 ·