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 Why doesn't light interact with dark matter?
- uniquestring
- · Replies 21 ·
Graduate ISIS image subtraction program; trouble running
- akf1001
- · Replies 2 ·
High School What can i see with this? (astronomy on a budget)
- jehan60188
- · Replies 11 ·
Graduate Spacetime: continuous or quantized?
- johann1301
- · Replies 1 ·
Can Satellite Watching Become an Addictive Hobby?
- DaveC426913
- · Replies 7 ·
Graduate Highest expansion rate during inflation.
- MTd2
- · Replies 8 ·
Undergrad Can Stars Become Black Holes Without Going Supernova?
- Routaran
- · Replies 6 ·
Graduate Particle creation in an accelerating Universe?
- johne1618
- · Replies 22 ·
Graduate Can Non-Conservation of Momentum Be Explained by an Asymmetry of Space?
- azabak
- · Replies 2 ·
Graduate What is the physical significance of the WMAP power spectrum?
- ditzycloud
- · Replies 10 ·
Graduate Newtonian cosmology vs relativistic cosmology
- houhou.trad
- · Replies 1 ·
Undergrad Energy of photons and the red shift
- davidmroper
- · Replies 2 ·
Graduate I have some somewhat detailed questions about inflation, curvature, and entropy
- ocsis2
- · Replies 12 ·
High School Can you see stars from the surface of a ringed planet?
- TkyToaster
- · Replies 3 ·
High School Tilt of the earth's axis. Why does it change?
- McLaren Rulez
- · Replies 5 ·
Graduate What Lies Beyond the Expanding Universe?
- beatlemaniacj
- · Replies 1 ·
Graduate Help with calculating an impact on the moon
- John Clayborn
- · Replies 2 ·
Graduate Spectral Energy Distribution of T Tauri stars
- Jamipat
- · Replies 1 ·
High School Any idea on how to identify a celestial event?
- murdochandi
- · Replies 5 ·
High School Question About the Wow Signal from 1977
- AlexSETI
- · Replies 10 ·
Graduate How Do We Distinguish Red Shift Changes Over Time in Distant Objects?
- kinman
- · Replies 5 ·
Graduate Does the Universe have a Boundary ?
- Aquafire
- · Replies 33 ·
Undergrad Convective motion and Stellar jitter
- Jamipat
- · Replies 1 ·
Graduate What about gravity's relativity?
- C. Bernard
- · Replies 18 ·
Graduate Where is the center of the universe?
- thetexan
- · Replies 127 ·
Graduate Is the total energy of each particle constant in an expanding universe?
- johne1618
- · Replies 2 ·
High School Why Can't I See the Milky Way in the City?
- joeyjo100
- · Replies 16 ·
Undergrad Fund ESA's Billion-Plus Euro Project for 2020s Launch
- Ryan_m_b
- · Replies 20 ·
Graduate What Caused the Flaw in the Singularity that Triggered the Big Bang?
- curiouschris
- · Replies 27 ·
Graduate Dark Energy Changing Into Dark Matter.
- hankaaron
- · Replies 9 ·
Graduate Could Neutrinos Be the Key to Understanding Dark Matter?
- WhiteKnights
- · Replies 47 ·
Graduate The Cyclic Model: Multidimenstional Membranes? Where do these come from?
- Physgeek123
- · Replies 2 ·
Graduate Antineutrinos? Is this a plausible theory?
- Physgeek123
- · Replies 1 ·
Undergrad Plank curves and emission/absorbtion spectra
- goldsax
- · Replies 5 ·
Undergrad Eccentricity of orbits and gravitational energy
- sk9
- · Replies 9 ·
Graduate Mechanism for matter creation in an expanding Universe?
- johne1618
- · Replies 3 ·
Graduate Question on how stars are located
- jackcr
- · Replies 9 ·
Undergrad Biggest Physics Discoveries 1980-2012
- Opus_723
- · Replies 16 ·
Graduate Can Simple Mass Accretion Turn a Neutron Star Into a Black Hole?
- tvscientist
- · Replies 12 ·
High School What is Gravity? How Does it Work & What Are Effects?
- Nash Su
- · Replies 3 ·
Graduate What happens when a neutron star collapses into a black hole?
- edearl
- · Replies 58 ·
High School Going to Mars as a private company - How hard would it be?
- Lightingbird
- · Replies 3 ·
Undergrad What would happen if the sun was hit by a gamma ray burst?
- Nash Su
- · Replies 1 ·
Graduate Cosmologists: why the acceptance of any weird theory but god?
- Homesick345
- · Replies 14 ·
Graduate Looking for an introduction to eternal inflation
- IRobot
- · Replies 2 ·
Graduate Spaghettification electromagnetism
- VeronicaS
- · Replies 7 ·
Undergrad Why Does Pi Appear in So Many Scientific Equations?
- goldsax
- · Replies 5 ·
Graduate The Sun and Hydrogen into Helium Fussion?
- parallaxoz
- · Replies 4 ·
Graduate Can light be affected by other masses in deep space?
- dan4blues
- · Replies 1 ·
Graduate How to Calculate Intensity in Airy Disk from a Point Source?
- Drakkith
- · Replies 2 ·
Graduate How to accrete neutral gas after the reionization of the universe?
- philherna
- · Replies 6 ·
Undergrad Do objects really take up space?
- taurusaud
- · Replies 11 ·
Graduate The Impact of Multiple Universes on Big Bangs
- space_buster
- · Replies 9 ·
Stargazing How many percent does the kepler telescope investigate of the sky?
- Gliese123
- · Replies 2 ·
Undergrad What is our perpective, where did it start, and why can we see it?
- Dokshifty
- · Replies 9 ·
Undergrad Is the Universe Finite or Infinite in Space?
- goodoldrebel
- · Replies 33 ·
Graduate Half Closed Universe: Is It Finite?
- sea100
- · Replies 16 ·
Graduate How do we account for all the elements in the Universe?
- CramerTV
- · Replies 3 ·
Graduate How Do We Know Gas Contributes to Galactic Gravity?
- adamq1
- · Replies 9 ·
Graduate How to calculate perihelion precession
- Bjarne
- · Replies 4 ·
High School Can Earth sustain much bigger object with an infinite weight?
- Munyit
- · Replies 22 ·
Undergrad Unraveling the Mystery of ISM Dust: Origins & Categories
- skydivephil
- · Replies 1 ·
Graduate Angular Resolution: Best Possible Observing Distance for Stars
- intervoxel
- · Replies 3 ·
Graduate Do Gravitational Waves Scatter and Increase Entropy?
- pawprint
- · Replies 7 ·
Graduate Rate of universe expansion question
- AdamLin
- · Replies 10 ·
Graduate If Betelgeuse Went Supernova Soon
- Drakkith
- · Replies 27 ·
Undergrad Where do the heavier elements come from, such as those found in planets?
- Kaldanis
- · Replies 5 ·
Graduate Could dark matter have gamma-ray absorption lines?
- johne1618
- · Replies 3 ·
High School How quickly does a star's supernova become apparent to the naked eye?
- Ender55
- · Replies 4 ·
Graduate Small scale effects of expansion, and 'bound' objects
- zhermes
- · Replies 16 ·
Graduate Short GRB's: Neutron Star Merger Evidence?
- skydivephil
- · Replies 3 ·
Graduate How do we define 'Earth like planet'
- YummyFur
- · Replies 20 ·
High School Why does the moon appear sideways in Michigan?
- Tomato
- · Replies 28 ·
Graduate What might happen if an object struck and replaced Luna
- highjustice
- · Replies 1 ·
Graduate Dark Energy, Dark Matter, and Empty Space
- soyounoat
- · Replies 8 ·
Graduate Need help learning about Dark Matter
- Bhumble
- · Replies 5 ·
Graduate Does Space Expand? What Do You Think?
- Wallace
- · Replies 176 ·
Undergrad Is the Universe’s Accelerating Expansion Theoretical or Observable?
- gttjohn
- · Replies 20 ·
Graduate Great Analogy of Holding a Rope Above a BH?
- Drakkith
- · Replies 3 ·
Graduate The meaning of the curvature term
- Loro
- · Replies 6 ·
Graduate Is the mass of a black hole diminishing for a free falling observer ?
- dreynaud
- · Replies 7 ·
Graduate Cosmo calculator-recession speed tutorial
- marcus
- · Replies 67 ·
Undergrad A few qustions about Dark Matter from a beginner.
- 721
- · Replies 3 ·
Graduate What is Magnetic Buoyancy and How Does it Affect Neutron Stars?
- ImaLooser
- · Replies 6 ·
Graduate Cantor, infinity and cosmology
- dkotschessaa
- · Replies 24 ·
Graduate Neutron star temperature and cooling
- tom.stoer
- · Replies 8 ·
Graduate What is the significance of JD and how is it calculated?
- JeffOCA
- · Replies 8 ·
Undergrad When astronomers speculate the distance of galaxies are they talking about its
- =entropy
- · Replies 1 ·
Graduate Hubble's law and cosmological density
- Naty1
- · Replies 20 ·
Graduate Does Creation of Energy in Universe Violate Conservation of Energy?
- Pandasaur1702
- · Replies 13 ·
Graduate Best Computer Language for Employment
- Andy Morris
- · Replies 6 ·
High School What is the minimum angular distance from the Sun for Venus to be visible?
- kaleidoscope
- · Replies 4 ·
Undergrad Dark Energy: Does It Affect All Space?
- binbots
- · Replies 32 ·
What Should I Include in a 15-Minute Astronomy Presentation for Special Kids?
- loocary
- · Replies 4 ·
High School I understanding the edge of the universe
- sambarbarian
- · Replies 5 ·
Did We Just Witness a Supernova in M95?
- Drakkith
- · Replies 11 ·
Undergrad Why Does the Analemma Show an Ellipse for Solstices?
- JeffOCA
- · Replies 8 ·
Graduate Is order a natural occurrence or a result of chaos?
- Primus2x
- · Replies 7 ·
High School Human Eyes See Cosmic Bubbles that Algorithms Miss
- Dotini
- · Replies 4 ·
Graduate What Are the Major Conflicts with Standard Cosmology Models?
- bill alsept
- · Replies 16 ·