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
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 Can single stars exist between galaxies?
- thetexan
- · Replies 21 ·
High School How Far Back Can We See with Better Optics?
- wolram
- · Replies 9 ·
Undergrad Directed panspermia mission to Mercury
- Alltimegreat1
- · Replies 28 ·
Undergrad Inconsistencies re Astronomical constants
- Buzz Bloom
- · Replies 13 ·
Undergrad Earth rotation different in hemisphere
- vishnu kumar
- · Replies 8 ·
Graduate Having Trouble Plotting the Cosmic Shear Power Spectrum Kernel?
- sunrah
- · Replies 4 ·
Undergrad Why does dark matter halo extend beyond the galaxy if Newton's shell theorem applies?
- greswd
- · Replies 12 ·
High School Can an object have too little mass to have a stable orbit?
- josh0196
- · Replies 4 ·
Graduate What are the implications for dark matter searches and supersymmetry?
- kodama
- · Replies 2 ·
High School Does gravitational radiation do work passing through objects?
- wolram
- · Replies 18 ·
Graduate Was there more galaxy clustering in early Universe?
- SteveDC
- · Replies 2 ·
Graduate Could gamma rays imply GW sources not black holes?
- Jonathan Scott
- · Replies 5 ·
Graduate Is this possible "giant planet' a hot topic in astronomy?
- alw34
- · Replies 10 ·
Undergrad Artificial Intelligence and astrophysics
- carllacan
- · Replies 5 ·
Graduate Interferometry of distant sources
- naima
- · Replies 4 ·
Undergrad Why doesn't the sun's gravity destabilize the moon's orbit around Earth?
- Zarhult
- · Replies 3 ·
Undergrad Acceleration in an Elliptical Orbit
- Geoff Pollock
- · Replies 4 ·
Graduate Is the Expansion of Space/Time a Result of Object Motion or Framework Growth?
- thetexan
- · Replies 3 ·
Undergrad Kepler's third law for elliptical orbits
- DanHelzer
- · Replies 10 ·
Undergrad Increase in Radius when a Star becomes a Red Giant
- Madi Araly
- · Replies 3 ·
Graduate Universe geometry and the FLRW metric simplified
- Mordred
- · Replies 29 ·
Graduate Does Dark Matter Contribute to the Mass, Charge, and Spin of Black Holes?
- Gerinski
- · Replies 13 ·
Graduate Conundrum of Solving True Anomaly in Binary Orbits: A Scientist's Dilemma
- Rod_123
- · Replies 3 ·
Graduate How Does Dark Energy Influence the Expansion of Our Universe?
- FredrikJ
- · Replies 7 ·
Graduate Do Magnetic Fields Affect Photons in Binary Pulsars?
- Ben123
- · Replies 4 ·
Graduate Integrating equations of motion with Earth perturbations
- morinmau
- · Replies 1 ·
Graduate Multiverse theory and Dark Matter
- billyp245
- · Replies 8 ·
Graduate How is the redshift of gravitational wave events measured?
- Jorrie
- · Replies 2 ·
Graduate How Did Earth's Rotation Change After the Moon's Formation?
- Buzz Bloom
- · Replies 19 ·
High School What Is Our Current Understanding of the Fabric of Space?
- icantevenn
- · Replies 7 ·
Graduate Gravitational waves, distance and space-time
- tim9000
- · Replies 11 ·
Graduate Is SUSY the next big step in cosmology
- wolram
- · Replies 2 ·
Undergrad What causes orbits to change over time?
- Algren
- · Replies 15 ·
Graduate What happens to energy of the stars?
- Whitefire
- · Replies 5 ·
Graduate What is a finite and bounded universe and how do scientists envision it?
- Alltimegreat1
- · Replies 24 ·
Graduate Three body problem: degrees of freedom and first integrals
- throneoo
- · Replies 2 ·
Stargazing Stellar abberation (water in telescope)
- Buckethead
- · Replies 2 ·
Why does the moon appear full near the sun in photos?
- Jessica Ann Yost
- · Replies 53 ·
Graduate EM length of gravitational waves
- pioneerboy
- · Replies 7 ·
High School How are gravitational waves detected by LIGO?
- Saanchi
- · Replies 18 ·
Graduate Gravitational waves, compensate for the Earth's movement
- MartinMb
- · Replies 10 ·
Graduate Are there a regions of space with no gravity?
- thefredman
- · Replies 27 ·
Undergrad Does the age of the universe constrain its total size?
- Pjpic
- · Replies 4 ·
Graduate Do masses warp spacetime in a way that affects galaxy rotation curves?
- IsaacM
- · Replies 14 ·
Undergrad What If I Were Able to Remove All Matter From the Universe?
- Strong Eagle
- · Replies 4 ·
Undergrad Are researchers really this interested in 'Planet 9'
- alw34
- · Replies 6 ·
Graduate Difference between spacetime and the gravitational field?
- R. E. Nettleton
- · Replies 1 ·
Undergrad Why isn't Mercury considered for manned missions instead of Mars?
- Alltimegreat1
- · Replies 10 ·
High School Supernova discovered in Centaurus A on February 7, 2016
- davenn
- · Replies 2 ·
Graduate Computing 'Sound' Frequency of a Planet: Possible Methods?
- Nineways
- · Replies 4 ·
Graduate Can a black hole shrink another black hole's event horizon?
- Algren
- · Replies 5 ·
Undergrad Gravitational waves due to Big Bang?
- smims
- · Replies 2 ·
Graduate F(R) gravity and the Hubble parameter
- shadishacker
- · Replies 2 ·
Graduate Expansion of the universe, acceleration limit
- tim9000
- · Replies 23 ·
Graduate Why do merging black holes lose energy as gravitational waves?
- TheMohawkNinja
- · Replies 8 ·
Graduate The mechanics of gamma ray bursts
- Abdul.119
- · Replies 8 ·
Graduate Question on gravitational waves and redshift in BH coalesce
- Javier Zapater
- · Replies 5 ·
Graduate Question: Accelerating Universe = Net Positive Energy?
- HappyMonster3000
- · Replies 7 ·
Graduate Perception of time, gravitational waves.
- Densedog
- · Replies 1 ·
Graduate When is the peak energy of gravitational radiation
- wolram
- · Replies 2 ·
Graduate Accurate Measurement of Cosmological Constant Value
- Einstein's Cat
- · Replies 3 ·
Graduate What happens to the wave impedance of free space at ω=0?
- Shinji83
- · Replies 3 ·
Graduate Can LIGO data replicate the Michelson-Morley experiment?
- fizzy
- · Replies 6 ·
Graduate What Does the Gravitational Wave Signal GW150914 Sound Like?
- snorkack
- · Replies 2 ·
Undergrad How diverse would a subterranean ocean be?
- newjerseyrunner
- · Replies 18 ·
Graduate Clearing up my Cosmological Confusion - what is expanding?
- rede96
- · Replies 1 ·
Insights LightCone7 Tutorial Part III - How Things are Computed - Comments
- Jorrie
- · Replies 1 ·
Graduate Rumors of 3rd LIGO Event: New Scientific Article Sheds Light
- phyzguy
- · Replies 1 ·
Graduate The big bang was a fluctuation of what?
- w0_0dy
- · Replies 2 ·
High School Stars we see are actually their past?
- Esas Shakeel
- · Replies 12 ·
Graduate Did an explosion of a Black Hole make the Big Bang
- Gjmdp
- · Replies 13 ·
Graduate What are the properties of de Sitter space?
- momo666
- · Replies 4 ·
Graduate Where do gravitational waves get their energy from?
- thetexan
- · Replies 4 ·
Graduate Nobel prize for Brown and Batygin?
- pioneerboy
- · Replies 2 ·
Graduate Dark Energy Constant: Is It Constant or Increasing?
- Einstein's Cat
- · Replies 3 ·
Graduate Are newly discovered galaxies the source of the Great Attractor?
- wolram
- · Replies 2 ·
Stargazing Brightness of objects through a telescope
- NihalRi
- · Replies 1 ·
Graduate How are dark energy and matter quantified?
- gnnmartin
- · Replies 6 ·
Graduate Why do pulsars emit radiation from both poles?
- rnielsen25
- · Replies 3 ·
Graduate Why Does the ELP2000-82b Lunar Theory Differ from Jean Meeus' Adjustments?
- cptolemy
- · Replies 2 ·
Graduate Is Planetary Contamination Prevention Enough for Space Colonization?
- Alltimegreat1
- · Replies 5 ·
Undergrad Getting a feel for how much the Universe expands
- wolram
- · Replies 11 ·
Undergrad How are mathematical concepts translated into illustrations
- Alice 123
- · Replies 4 ·
Graduate What is the trace of a second rank covariant tensor?
- dwellexity
- · Replies 4 ·
Graduate Could Dark Energy Be Caused by Imaginary Mass Traveling Faster Than Light?
- tmv3v
- · Replies 6 ·
Undergrad Has time always ticked the same?
- dodo
- · Replies 8 ·
Undergrad How would Earth be affected by an additional smaller moon?
- Kid Ljungblom
- · Replies 10 ·
Graduate Is the LCDM Model Challenged by Evidence of Running Cosmic Vacuum?
- wolram
- · Replies 7 ·
What's going on in this snapshot from the ISS?
- Zarhult
- · Replies 45 ·
Undergrad Will the night sky change as the solar system orbits the galactic center?
- Alltimegreat1
- · Replies 9 ·
Undergrad What other explanations have physicists proposed for the birth of our universe?
- at94official
- · Replies 1 ·
Undergrad What is dark matter/dark energy? Are there differences?
- Malkin6701
- · Replies 5 ·
What's going on with the jets from SS433?
- Bernie G
- · Replies 1 ·
Undergrad Could Planets Exist in Intergalactic Space?
- Alltimegreat1
- · Replies 2 ·
Undergrad Observational evidence for universal expansion beyond redshift
- TheCanadian
- · Replies 2 ·
Graduate How Are Mean Orbital Elements Calculated?
- cptolemy
- · Replies 1 ·