Astronomy, Astrophysics, Cosmology Forum

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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.
Graduate Inside the big bang were their other sub big bangs?
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Graduate Does Chiral EM Asymmetry Imply Matter-Antimatter Asymmetry?
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Graduate Relationship betwen ##Ω_k## and ##k##
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Graduate Expanding universe - some thoughts
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Graduate Universe density in Hyperbolic Universe
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Graduate Litterature on Statistical Homogeneity and Isotropy
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Graduate Upper bound on the Inflation's e-foldings
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Graduate CMB , Spherical Harmonics and Rotational Invariance
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Graduate Referance Frame Calculating Newtonian Friedmann Equation
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Graduate What is the cause of space expansion in the universe?
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Graduate Question about gravitational waves, E modes
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Graduate General differential equation solution for Kepler Problem
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Graduate How do galaxies die? Contradictions between two papers
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High School Question on Comet 67P tail in Rosetta image
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Undergrad Distance Comparison: Converting 48 Distance Modulus to Meters
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Undergrad Confirmation on the Effect of Solar Irradiance
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Graduate Lyman Series Wavelengths - measurement standard?
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Graduate Universe from nothing, again....
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Graduate M31 halo paper - question on metallicity
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Graduate Can we be sure about there was nothing before big bang?
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Graduate Galaxy Acceleration: Unraveling the Mysteries of Dark Energy
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Graduate Will the time will eventually stop like a snapshot?
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High School Orbiting Eternally: Physics Q&A with Steven
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Graduate Compatibility of General Relativity with SO(3)
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Graduate In Need of Some (Measurable) Illumination
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Graduate If space is curved, could it be detected
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Graduate Is "heavy nothing" already infinite or is it expanding?
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Graduate Does the Universe Have a Preferred Frame of Reference?
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Graduate Is the mass of the universe finite (collection of objects)?
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Graduate Detecting the presence of other universes
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Graduate Does Relativity Alter Our Perception of Galaxies?
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Graduate Boltzmann Brains: Are They Taken Seriously by Scientists?
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What will happen if our sun color blue?
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Graduate Can We See CMB Again If Universe Expands at a Constant Rate?
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Graduate Radio astronomical receiving system
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Graduate Can Dark Energy Be Described as a Force?
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Graduate Time and Universe: Shedding Light on Dark Energy & Dark Matter
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Graduate What's the universe radius function
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Graduate Earth's velocity wrt CMB gives the centre of the universe?
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Undergrad How can I know if two stars came from the same cluster?
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Graduate Measuring Gravitational Redshift due to Galaxies without GR
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Graduate How Far Can We Detect Faint Celestial Objects Near Our Solar System?
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Graduate Baryon number conservation in early universe when T<m
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Undergrad Find Radial Velocity of Galaxies
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Graduate What if expansion rate of a universe is the speed of light?
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Graduate Explaining Universe Expansion Through Gravity & 3D Geometry
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Undergrad Is Earth the Center of the Universe?
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Graduate Cosmic strings account for primordial SMBH production?
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Graduate CMB polarization: the E and B modes
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Graduate Very Large Halo Around the Andromeda Galaxy
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Stargazing Can I Make My Own 8 Telescope with These Required Instruments?
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Graduate Can time be a periodic function in GRFE?
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Graduate If the universe has a spin, was it causing the similar
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Undergrad Calculating Star and Planet Positions in the Night Sky: A Mathematical Approach
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Undergrad Is the expansion of the universe similar to an explosion?
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High School How much energy radiates from Jupiter?
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Graduate Universe: Is it Nothing? | Steven
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Undergrad If we consider the universe as bounded but infinite
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Undergrad Gravity moving toward the center of the Sun?
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Graduate How does a particle's kinetic energy vary with a(t)?
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Is there any physicists i could email?
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Undergrad Expansion of space in our neighborhood
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Graduate Primordial Neutrinos: Density & Temperatures
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Graduate Can the expansion of space affect the speed of light?
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Graduate Uncovering Krauss's Flaws: Analysis of Claims in a Universe from Nothing
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Graduate Gamow peak and nuclear reaction rate
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High School What Would Happen if I Threw My Watch into a Black Hole?
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Graduate Farthest Object in Universe & Multiverse | Steven
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Graduate Lightcone 1.0 basic redshift article development
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Graduate Big Bang Temperature - What Was It?
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Graduate Would a supermassive black hole explode?
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Stargazing Problem in making a small refracting Telescope
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Graduate Is Dark matter an optical illusion?
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High School Are there any "Polar" solar system structures?
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Undergrad Am I moving, or is space moving?
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Graduate Calculating the event horizon of black holes.
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Undergrad Redshift, Earth's orbital speed, and the speed of light
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Undergrad Using the Suns gravity for propulsion
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Stargazing Why is there no Hubble-like telescope on the International Space Station?
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Graduate Predicting angle of deflection of light
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Graduate How many cubic planck lengths are in the observable universe?
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Undergrad Loss of mass of an object falling through air
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High School Conservation of momentum of collision
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Graduate Are there multiverse models with infinte regress?
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Graduate Simple no-pressure cosmic model gives meaning to Lambda
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New Horizons Sees First Features on Pluto
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Graduate Observational difference between OS and FLRW
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Graduate Can NASA's Impossible EM Drive Revolutionize Space Travel?
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Graduate Do Dark matter and Dark energy interact?
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Graduate Mass of a galaxy without dark matter and with dark matter
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Can you see the atmosphere with you eyes or only through photos? (In space)
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Graduate How Does the Universe Use Temperature Differences to Create Structures?
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Graduate Is the Multiverse of Cantor Dust a Viable Solution to Olbers' Paradox?
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Undergrad Which laptop operating system do astronomers most often use?
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Graduate Observing galaxies that recess faster than c
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Graduate Complex organic molecules discovered in protoplanetary disk
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Graduate Supernova | Rogue Neutron Star Formation
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Graduate Looking for the complete fusion process inside our Sun.
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Graduate How much energy do we need to make an expanding universe?
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Graduate Cold Spot in Cosmic Background Radiation
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