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 Dark matter and energy may not exist?
- Phys12
- · Replies 1 ·
Undergrad Could vacuum decay save multiverse ideas?
- Suekdccia
- · Replies 1 ·
Undergrad Could dark matter be too reflective to detect?
- Jeth Orensin
- · Replies 5 ·
Undergrad How does the speed of light affect expansion acceleration?
- Joe Fatuch
- · Replies 15 ·
Undergrad Is There an Extra Time Dimension in Paul Steinhardt's Cyclic Model?
- lolofromfrance
- · Replies 4 ·
Undergrad What does BGC wobbling reveal about dark matter interactions?
- Arman777
- · Replies 7 ·
Stargazing How hard is it to find filtered color bands using telescope?
- spacetimedude
- · Replies 1 ·
Undergrad How Bright Would the Milky Way Look If It Had No Dust?
- CygnusX-1
- · Replies 1 ·
Undergrad What % of the heavy elements are produced by kilonovas vs. supernovas?
- bbbl67
- · Replies 38 ·
Undergrad What is the universe expanding into ? Eternal inflation
- windy miller
- · Replies 1 ·
Graduate Milancovitch cycles and how they relate to seasons
- caters
- · Replies 4 ·
High School How do scientists detect spacetime ripples if spacetime isn't real fabric?
- mr1batman
- · Replies 12 ·
High School Gravitational Wave Stretching: LIGO Arm vs Light
- Alfred Cann
- · Replies 5 ·
High School Did a Star Go Supernova Twice?
- mfb
- · Replies 16 ·
Undergrad Magnetic field of Solar System planets
- Pedro de la Torre
- · Replies 4 ·
Undergrad Does Entropy Change on Horizons?
- friend
- · Replies 12 ·
High School Acceleration of a proton/electron toward a neutron star
- Starkiller
- · Replies 6 ·
High School The bizarre rotation of galaxies
- Wallsy
- · Replies 4 ·
High School Why will the sun expand as it exhausts its fuel?
- shihab-kol
- · Replies 7 ·
Undergrad Can planets have multiple liquid layers with circulation?
- Brage Eidsvik
- · Replies 6 ·
Graduate What would happen if dark energy was injected into a black hole?
- saitzan
- · Replies 3 ·
High School Could a brown dwarf passing through our solar system ignite Jupiter?
- Beth Doodle
- · Replies 40 ·
Undergrad How to derive number of nucleons in Universe?
- jcap
- · Replies 2 ·
Undergrad Resemblances between moon surface and earth mantle
- mark!
- · Replies 2 ·
Undergrad Why is the Sun Yellow/Orange and Not White?
- nmsurobert
- · Replies 11 ·
Why is interest in physics and astronomy declining among younger people?
- valentinacozenkova
- · Replies 17 ·
Undergrad Determining The Inclination Angle of A Stellar Binary System
- Phys12
- · Replies 3 ·
Stargazing Impact of Kepler Telescope Findings on the Drake Equation
- SciencewithDrJ
- · Replies 8 ·
High School Singularities in spacetime diagrams: representation or artifact?
- Cerenkov
- · Replies 6 ·
High School Should dark photons be gauge bosons or non-gauge bosons?
- star apple
- · Replies 10 ·
Undergrad First Chinese space station about to de-orbit soon
- rootone
- · Replies 2 ·
Graduate Is the Higgs Field Vacuum Energy Density Negative?
- deneve
- · Replies 2 ·
High School Why does a planet's crust contain elements heavier than iron from neutron star mergers?
- swampwiz
- · Replies 4 ·
Undergrad How much number crunching is necessary in some simulations?
- lpetrich
- · Replies 1 ·
Graduate What Are the Future Strategies for Space Exploration and Colonization?
- ISamson
- · Replies 8 ·
Graduate Before the Big Bang - New videos - Cambridge university
- Eleni_
- · Replies 1 ·
High School Do black holes exist if mathematics breaks down at the singularity?
- wolram
- · Replies 36 ·
High School How Large Is the Entire Universe?
- Cato
- · Replies 22 ·
Undergrad Nuclear batteries on space probes
- nmsurobert
- · Replies 8 ·
High School Does Modern Astronomy have a problem?
- carl susumu
- · Replies 22 ·
High School Why is the asteroid belt located between Mars and Jupiter?
- shihab-kol
- · Replies 7 ·
High School How does LIGO measure gravitational waves
- AamsterC2
- · Replies 3 ·
Undergrad Center of Image - Brightness Distribution
- BOAS
- · Replies 3 ·
Undergrad Difference between oscillatory/cyclic model and big bounce?
- Suekdccia
- · Replies 1 ·
Undergrad Dark Matter Simulation in Today's APOD
- Buzz Bloom
- · Replies 5 ·
Undergrad Do causal patches with different matter reach thermal equilibrium at different rates?
- durant35
- · Replies 7 ·
High School Can I average travel times at initial and final velocity?
- Mantikore
- · Replies 20 ·
Stargazing Stunning Telescope Photo of Vega Captured with 130mm Eyepiece - See the Beauty!
- bruha
- · Replies 37 ·
Undergrad Enforcing artificial frozen orbit
- a_potato
- · Replies 3 ·
High School Where Did All the Matter in the Universe Come From?
- ISamson
- · Replies 5 ·
Graduate Why Are These Accretion Disk Concepts Challenging?
- Shan K
- · Replies 2 ·
Undergrad Angular momentum of the Universe
- rootone
- · Replies 12 ·
Undergrad Is there a stellar type that would make Firefly possible?
- DET
- · Replies 6 ·
Stargazing Why are there no stars visible on a clear night in Ireland?
- rootone
- · Replies 8 ·
Undergrad Cosmological constant problem, interesting solution?
- windy miller
- · Replies 3 ·
High School Should we search for non-biological "life"?
- SciencewithDrJ
- · Replies 33 ·
High School Apparent magnitude / absolute magnitude / luminosity
- mtig
- · Replies 2 ·
Undergrad Is there an alternative theory to dark matter?
- KBon
- · Replies 43 ·
Undergrad How to determine if an asteroid will burn up or hit Earth?
- justiny92
- · Replies 4 ·
High School Would a hidden planet behind the sun cause extreme tides and earthquakes?
- jayzun
- · Replies 4 ·
High School Wobbling galaxies: New evidence for dark matter
- wolram
- · Replies 1 ·
Undergrad Instability of the Solar System
- Silviu
- · Replies 10 ·
Undergrad What is the difference between phase space and state-space?
- student-engineer
- · Replies 1 ·
Undergrad Source of Heavier than Iron Nucleosynthesis
- SciencewithDrJ
- · Replies 2 ·
Stargazing Does pixel binning reduce noise better than software filtering?
- sophiecentaur
- · Replies 2 ·
High School How Do Electromagnetic Stellar Gravity Waves Simulate Sound at LIGO?
- carl susumu
- · Replies 5 ·
Stargazing Telescope Guiding Techniques: Improving Exposure Times through Auto Guiding
- sophiecentaur
- · Replies 51 ·
High School Does a gravitational wave change the speed of light?
- Happiness
- · Replies 7 ·
High School Telescope and Stopwatch for the Mass of a Planet
- Abu
- · Replies 8 ·
Undergrad Does knot theory explain why the universe is three-dimensional?
- wolram
- · Replies 5 ·
Undergrad Vibrations of astronomical bodies
- Stickman76
- · Replies 7 ·
High School We could lose electricity and satellites due to solar flares
- ianz1234
- · Replies 2 ·
Undergrad Can a supernova produce multiple stars?
- Albertgauss
- · Replies 16 ·
Stargazing What will be the outcome of the NGC4993 neutron remnant collision?
- JDL1964
- · Replies 14 ·
Insights Getting Started with Solar System Imaging - Comments
- NFuller
- · Replies 4 ·
Undergrad Number of galaxies in the Universe
- davidge
- · Replies 25 ·
Graduate Does gravitational collapse limit Neutron Star size?
- Will Oakley
- · Replies 7 ·
Undergrad Is Inflation unlikely or likely?
- star apple
- · Replies 8 ·
Undergrad Is it possible to have a black star?
- bbbl67
- · Replies 13 ·
High School Is the Edge of the Universe Defined by the Cosmic Microwave Background?
- SocratesRedux
- · Replies 14 ·
Undergrad Can a finite universe become infinite through expansion?
- laymanB
- · Replies 79 ·
Undergrad LIGO: How to Know Wave Direction?
- nmsurobert
- · Replies 2 ·
Undergrad Why does Hubble sphere expand with time?
- Happiness
- · Replies 13 ·
Undergrad Heavy elements from neutron star collisions?
- maline
- · Replies 6 ·
Undergrad Electromagnetism in the Lithosphere and Ionosphere
- Paul Brooke
- · Replies 6 ·
Undergrad Neutron star merge why didn't all EM radiation came at once?
- Borek
- · Replies 1 ·
Undergrad Why is U replaced by -kc² in the Friedmann equation derivation?
- Das apashanka
- · Replies 15 ·
Undergrad Why is the Matter+Lambda Universe Equation Equal to 1-Ω?
- Das apashanka
- · Replies 10 ·
High School The star's core cannot withstand its own gravitational force?
- Karagoz
- · Replies 8 ·
Graduate Quantum fluctuations of the metastable false vacuum
- momo666
- · Replies 37 ·
Undergrad Moving through space vs sitting in an expanding space
- Happiness
- · Replies 6 ·
Graduate Is gravitational constant unchanging over age of universe?
- Gate2wire
- · Replies 3 ·
Undergrad Dark Energy and the Cyclic Universe?
- bbbl67
- · Replies 3 ·
High School Dark matter and SMBH orbital decay
- newjerseyrunner
- · Replies 4 ·
Undergrad How does the solar wind affect power grids?
- rachelph
- · Replies 8 ·
High School Does Verlinde's theory explain galaxy rotation without dark matter?
- resurgance2001
- · Replies 46 ·
High School What is dark energy in the fabric of space-time?
- Daine
- · Replies 2 ·
Undergrad Dark matter theories for an astrophysics presentation
- Erenjaeger
- · Replies 30 ·
High School They found some missing mass, Hideki Tanimura Institute of S
- Spinnor
- · Replies 2 ·
High School Ring Found Around Pluto Neighbor Haumea
- CygnusX-1
- · Replies 1 ·