Cosmology Forum

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Join in expert discussion on topics revolving around cosmology. Cosmology is the origin, evolution, structure and eventual fate of the universe.
Undergrad Continuous Lensing Models: Discrete Data
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High School Is cosmopsychism theory just babble copied from The Force?
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Undergrad Mass in the early universe and the CCC model
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High School The Universe vs Observable Universe
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Graduate Can a 3d holographic universe exist in 3d?
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High School MPEG movie: traveling to a black hole or a neutron star
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Undergrad Question regarding Evaporation of galaxies
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Undergrad Is it possible to stretch a singularity?
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Graduate Primordial black holes need to be collisionless....
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Graduate Are our equations for this universe valid in all universes?
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Undergrad Deriving the Cosmological Constant
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High School Why is there something rather than nothing?
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Undergrad Topology of the Universe and infinities
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Undergrad Could it have been the Big Leak and not the Big Bang?
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Undergrad If the universe is truly infinite in size....
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Graduate How can the universe keep on expanding if it's infinite?
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Undergrad How do CTCs allow a universe to self-create?
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High School What is the highest redshift (Z number) a galaxy can have?
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Undergrad Origin of supermassive blackholes in the very early universe
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Insights Coordinate Dependent Statements in an Expanding Universe - Comments
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High School What was matter like during the GUT and Electroweak Epochs?
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Undergrad Exploring Different Models of the Universe
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Undergrad Is Expansion of Space Affecting Gravitational and Nuclear Forces?
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Undergrad Cosmological Redshift: Distinguishing From Doppler Effect
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High School From where is the universe expanding?
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Undergrad What Values Can Ωk Take in the Equation Ωm+Ωr+Ωk=1?
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Undergrad Observable Universe Tempature and CMB
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Undergrad Is Gravitation Responsible for the Stability of the Universe?
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Insights What Insights Does the Friedmann Equation Offer About Our Universe?
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Graduate Entropy and derivations - is my logic faulty?
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Undergrad Friedmann Equation - Positive Curvature
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Insights A Poor Man's CMB Primer. Part 5: Quantum Seeds - Comments
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High School Why does the multiverse theory have only 4 levels?
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High School Does the multiverse really include ALL outcomes?
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Graduate Does zero exist in the energy term?
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Graduate Equation of State w=1: Why Not Considered in Cosmology?
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High School Do we see things slower the further away they are?
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Undergrad How to measure time in the early universe?
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Undergrad What is the acceleration of expanding space?
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High School Can someone explain the Aguirre-Gratton model & how it works?
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High School Is Everything in the Expanding Universe Growing Along with It?
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Undergrad How did time move forward during the Big Bang?
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Undergrad Is the Friedmann Space-Time Observable Without Dark Energy?
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Graduate New high-redshift quasar age issue
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High School Spacetime Geometry: Understanding Causality & Effects
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Undergrad Expansion Rate of Cosmic Bubbles
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Undergrad Entropy of the last scattering surface and today's universe?
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Undergrad Is high redshift data a problem for ΛCDM?
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High School Big Bang Wasn't the Beginning? Study Proposes Alternative....
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Undergrad What is the Cause of Space Expansion?
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Undergrad Can someone explain the Higgs Boson and its significance in particle physics?
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High School A photon left galaxy G, 12 by ago and is reaching Earth now
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Undergrad MUST every possible thing happen in a Tegmark L1 Multiverse?
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Undergrad Will the acceleration of the expansion of universe ever decrease?
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High School Balloon Analogy - 3D universe on a 2D plane
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Undergrad Dark Matter and Dark Energy Conundrum
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High School De Sitter Equilibrium: Could it Exist in Heat Death?
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High School Does the Universe have finite or infinite size?
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High School Scale Invariance and dark matter/dark energy
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High School What if the universe's expansion is actually slowing down?
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Undergrad Cosmological constant and rate of expansion of the universe
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High School Is Scale Invariance the Key to Understanding the Expansion of the Universe?
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High School Implications of gravitational waves from the Big Bang?
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High School Could time move inside a black hole?
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Undergrad Could the Big Bang's Location Be Defined by Gravitational Forces?
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Undergrad Could dark matter be just too reflective?
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Undergrad How does the speed of light affect expansion acceleration?
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Undergrad Is There an Extra Time Dimension in Paul Steinhardt's Cyclic Model?
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Undergrad What is the universe expanding into ? Eternal inflation
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Undergrad Does Entropy Change on Horizons?
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Undergrad How to derive number of nucleons in Universe?
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High School Can somebody help me understand singularities better please?
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High School Decoding Dark Photons: Gauge Symmetry in the Dark Matter Sector
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Is the Higgs Field Vacuum Energy Density Negative?
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High School How Large Is the Entire Universe?
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Undergrad Difference between oscillatory/cyclic model and big bounce?
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Undergrad Equilibrium of Universe: Earth vs. Black Hole
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High School Calculating Average Time for Travel Using Acceleration and Velocity
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High School Where Did All the Matter in the Universe Come From?
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Undergrad Angular momentum of the Universe
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Undergrad Cosmological constant problem, interesting solution?
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High School Does a gravitational wave change the speed of light?
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Undergrad Is the Three-Dimensional Universe Explained by Knot Theory?
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Undergrad Number of galaxies in the Universe
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Undergrad Is Inflation unlikely or likely?
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Undergrad The Expanding Universe: A Scientist's Perspective on Infinite vs Finite Space
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Undergrad Why does Hubble sphere expand with time?
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Undergrad Understanding the 2nd Term of the Friedmann Equation: Replacing U with -kc^2
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Undergrad Why is the Matter+Lambda Universe Equation Equal to 1-Ω?
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Graduate Quantum fluctuations of the metastable false vacuum
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Is gravitational constant unchanging over age of universe?
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Undergrad Dark Energy and the Cyclic Universe?
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High School Explain Dark Matter: Verlinde's Theory Tested
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High School What is dark energy in the fabric of space-time?
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High School They found some missing mass, Hideki Tanimura Institute of S
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Undergrad Galaxy Rotation Curves and Mass Discrepancy
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Undergrad Where Does the Cosmic Microwave Background Come From and How is it Measured?
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Undergrad Dark Energy Not Constant: New Claims
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High School Quantised Inertia: A Solution to Dark Matter and Galaxy Rotations
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High School Black holes in the centres of galaxies
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