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.
High School How does the cosmological constant affect gravitational collapse?
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High School Dark matter interactions other than gravity
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Undergrad Cosmology Comoving coordinates and observers
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Undergrad Demonstration of comoving volume between 2 redshifts
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Undergrad Big Crunch and the Universe's shape
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Undergrad In the Universe do straight lines exist?
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Undergrad How does the Singularity produce all the diverse matter in the universe?
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Undergrad Does Hawking Radiation Cause Black Holes to Evaporate?
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High School New theory of the early Universe
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High School Question about calculating the density of the Universe
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High School Difference between an Einstein frame and a String frame?
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Graduate BGV-theorem and Penrose's Conformal Cyclic Cosmology
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Undergrad Schwartzchild radius and the Big Bang
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Undergrad Reason for matter rather than antimatter?
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Undergrad What "space" is used in defining cosmological distributions?
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Undergrad Qs re the behavior of atoms after decoupling completed
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Graduate Confusion in Angular diameter distance
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Graduate Are topological defects such as domain walls really discontinuous?
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Undergrad What is the density of hydrogen atoms in the Universe?
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Graduate Experimental test of shrinking matter theory?
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Undergrad Multiple Universes Coming into Contact
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High School Is the Big Bang only about the observable Universe?
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Undergrad New Hubble Paper On Lensing In Galactic Clusters
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High School Questions about the Curvaton particle
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High School Finding the present day distance to a galaxy
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Graduate Accelerated Hubble expansion -- Is the second derivative positive?
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High School Can Time Truly Flow Backwards in Quantum Physics and Cosmology?
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Undergrad Effect of Dark Matter on fast moving bodies
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High School Question about the size of atoms as time progressed
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High School Why does our Universe have more electrons than positrons?
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High School Dark matter does not interact with ordinary matter....
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Graduate Binnig's fractal evolution applied to multiple universes?
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Undergrad Laws Before Big Bang or After Big Bang
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High School The accelerated expansion of the universe; redshift and time/distance
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Undergrad What Key Issues Should Cosmologists Address in the ΛCDM Model?
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Undergrad Why can you not describe massive neutrinos with a temperature?
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Undergrad How do we observe the CMB at all?
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High School A Meritable Veritable Time Paradox?
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Undergrad What proof do we have that the universe is homogenous?
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High School Low entropy early Universe and the heat death musings
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Graduate Can Cosmic Strings Trigger Vacuum Decay?
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Undergrad How Does The Cosmic Microwave Background Show That The Universe is Expanding?
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Undergrad Is Negative Dark Energy Density a Valid Concept in Universe Models?
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Graduate Exploring Minkowski: A Multi-Dimensional Grid for Studying Other Spaces?
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Undergrad Meaning of the inertial energy density
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Graduate The Cosmological Principle means infinite Observable Universes
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Undergrad CMB creation, distance measurement question
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High School How was the amount of matter in the Universe determined?
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High School Did energy begin to exist? Can energy exist without space and time?
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Undergrad Is the backward extrapolation of the expansion of the Universe valid?
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Undergrad How to measure a 21 cm EM wave if it is Doppler shifted?
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Undergrad Wheeler's Mutability principle and multiple universes?
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Undergrad If a 4th dimension existed would universe expand anisotropically?
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Undergrad Discover the Rare Black Neutron Star
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Undergrad Could Dark Matter Be Present in Our Solar System?
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High School Does the Universe really have to be at least as old as the oldest thing in it?
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Graduate Lovelock Theorem & FRW Domain Wall Cosmological Model in f(G) Theory
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Undergrad Hypothetical Eclipse Calculation
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High School Quantum total eclipse of the sun?
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Undergrad Big bounce theory in light of the closed Universe finding
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Undergrad How Do You Derive Transverse Comoving Distance?
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Undergrad BICEP2's Mis-Estimation: Was Not CIB Subtraction the Cause?
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High School What is Consciousness? How does it affect our Physical Universe?
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Undergrad Mass & Radiation 3D Distribution in the Universe
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Undergrad If the Universe is closed, is it thereby self-contained as well?
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Undergrad Is the Universe bigger than we think?
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Graduate N-body simulation with varying neutrino mass
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High School Half of the Universe’s ordinary matter may have been found
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High School Lensing Gravitational Waves Like Light?
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Undergrad Conservation of energy in cosmology
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Graduate How to see if a cosmological model is flat?
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High School Is the Universe Truly Finite According to the Big Bang Theory?
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High School How does emergent spacetime work?
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Undergrad The picture of the Comoving coordinate
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Undergrad Curvature of Space in the Context of Cosmology
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Undergrad What happens when a Neutron Star forms a Black Hole?
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Undergrad Constant Curvature and about its meaning
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Undergrad The Cosmological Principle and the Universe
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Undergrad Possible illogicalness of a 3-sphere shape of the Universe's space?
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Undergrad What percent of the universe is outside of galaxies?
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Undergrad Can the multiverse hypothesis be an explanation for life on Earth?
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High School If the Multiverse is correct why don't they appear inside our own?
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High School What Happens When You Fall Into a Black Hole According to Stephen Hawking?
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Undergrad Gauge transformation in cosmological perturbation
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Insights Dark Energy Part 3: Fitting the SCP Union 2.1 Supernova Data
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Insights Dark Energy Part 1: Einstein-deSitter Cosmology
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Insights Dark Energy Part 2: LCDM Cosmology
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Undergrad Big Bang singularity: can we say anything about its size?
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High School If the Universe keeps expanding this way, it gets torn apart
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Undergrad Dark Matter Gravity: What Do We Know?
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Undergrad Has the evidence for anisotropy of cosmic acceleration been discussed?
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High School Meaning of Time / Space axes swapping (for Time)
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High School Black hole movement with no time......?
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Undergrad Who was the first to find an initial singularity in GR models of the universe?
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Insights The Evolution of the Universe, Cosmic Web and Connections
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Undergrad Can Dark Matter Exist in Higher Dimensions?
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Undergrad What Does a Negative Value for the Deceleration Parameter Imply in Cosmology?
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High School Is it possible to see the history of space if it expands faster than light?
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Undergrad Understanding inflationary cosmology
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Undergrad Is My Basic Understanding of Universe Expansion Correct?
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