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.
High School Earth & Moon Gravity Gradient: Investigating Its Impact
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Graduate What is the jerk parameter in terms of the Density parameters?
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Undergrad Infrared energy flux from the Moon
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High School The infinite and the infinitesimal
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Undergrad How Does Space Travel Affect Natural Aging?
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High School An interesting consequence of the closedness of the Cosmos
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Graduate Black Holes Formalism: Overview of Misner Sharp Mass
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High School How can dark energy comprise 74% of the Universe?
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Undergrad Is Scale Factor Continuity and Differentiability Necessary?
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High School Nature: "A massive white-dwarf merger product before final collapse"
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High School Are subspaces of Hilbert space real?
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Undergrad Laws of physics from initial conditions?
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Undergrad Transparency of a gas compared to a plasma
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High School Can iron form via processes like the r- or s-process?
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Undergrad Is there any inflationary model without a fundamental theory?
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High School Where do the electrons go? (in stellar nuclear fusion)
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Undergrad Gravitational lensing: deriving magnification of lensed image
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High School Snapped Cable Damages Arecibo Observatory Radio Telescope
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Undergrad How is Adaptive Optics Revolutionizing Our Understanding of the Galactic Center?
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Stargazing What do stars actually look like from up close?
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High School Question about things moving through outer space
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Undergrad Blackbody colour of metals versus stars
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Undergrad What are the Characteristics of a Perfect Meteorite?
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Undergrad Is there a Friedmann equation form with inflation?
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Undergrad Matter leaving a spinning galaxy
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Undergrad Astronomy in a Simple Solar System
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High School Question about Planck's Function
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Undergrad Could Planck Stars Explain Black Hole Bounce and Resolve Physics Paradoxes?
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Graduate What is a dynamic spectrum measurement?
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Graduate Is the Universe Undergoing an Infinite Series of Expansions and Contractions?
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Graduate How to calculate Helium lensing
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High School What causes orbits to be inclined?
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High School Did the Big Bang follow multiple bangs? How did matter come to collide?
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High School Does Jupiter have an angular momentum problem?
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Undergrad Some questions about absorption lines
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Undergrad Change law of gravitation to remove dark energy and dark matter
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High School Question about the s-process and r-process in stellar evolution
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Undergrad At what wavelength do we observe ionized gas?
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High School Nervous about James Webb Space Telescope?
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Undergrad Can a Tube Launch System Harness Atmospheric Energy to Reach Space?
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High School Pair Instability Supernovae & Electron Capture Supernovae
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High School Earth's Hubble velocity and measuring Hubble at large distances
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Undergrad Contradictory Cosmological Values: Crisis for Cosmology?
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High School Help in explaining a question on gravity
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Undergrad Do we first determine the gravity or density of a celestial object?
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High School Star at black hole event horizon
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Graduate Orbital shutter as a beacon for interstellar communication
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Graduate How you add gauge groups to spacetime
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High School The composition of interstellar dust
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Undergrad Acquiring a Small Dataset of a pulsar signal
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Undergrad Determining Relative Position of Space Object to Earth
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Undergrad What is the best current value for Omega_r?
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Graduate An article on Big Bang theory contradictions
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Undergrad Question about spacetime singularities
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High School How does the cosmological constant affect gravitational collapse?
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High School Why is Carbon considered volatile?
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High School Dark matter interactions other than gravity
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Undergrad Fast Radio Bursts (FBR) detected in our own Galaxy
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The International Space Station as a Human Abode
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Undergrad Cosmology Comoving coordinates and observers
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High School NASA discovers water on the moon
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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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Graduate Average of the power spectrum of Poisson noise
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Undergrad Fourier Series and Cepheid Variables
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Undergrad Shape of Dark Matter Halos & Visible Matter Angular Momentum
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Undergrad How does the Singularity produce all the diverse matter in the universe?
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High School How does the observable Universe have meaning?
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Undergrad Does Hawking Radiation Cause Black Holes to Evaporate?
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Undergrad What Mechanism Creates the Jet Emanating From a Quasar?
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Undergrad Earth's Rotation & Orbit: Effects on Space Objects?
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Undergrad Can Alfvén waves be observed on a stellar spectrum using amateur equipment?
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Closed vs. Open Crawlspace & Automatic Vents vs. Dehumidifer?
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Graduate Biological Agent Phosphine Found on Venus
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High School New theory of the early Universe
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Undergrad Book to study the big bang theory
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Undergrad Number of known asteroids reaches 1 million
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Undergrad Huge Hole Found in the Universe
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Stargazing What are some good beginner telescopes for under £100?
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Graduate Efficiency of a heat engine in space
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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 How fast do galaxies 1 billion light-years away move away from us?
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Undergrad Q: Volume of the largest ellipsoid in space which contains no stars?
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Undergrad Schwartzchild radius and the Big Bang
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Undergrad What happens to a small star after burning all of its fuel?
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High School Some historic remarks on astrometry by Terence Tao
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Undergrad IRAS Filter Profile: Computing ##\lambda_{mean}##
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Undergrad Reason for matter rather than antimatter?
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High School Phys.org - Carbon creation finding set to rock astrophysics
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Undergrad Preprocessing FIT Files to Bias and Flat Correction Using Python Script
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Undergrad What "space" is used in defining cosmological distributions?
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Undergrad Black Hole Event Horizon Hypothesis
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Undergrad Qs re the behavior of atoms after decoupling completed
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Undergrad Which will be brighter when it supernovas - Eta Carinae or Betelgeuse?
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Graduate Confusion in Angular diameter distance
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Undergrad Do Black Holes Exist? | Physics & Stephen Hawking
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Graduate Are topological defects such as domain walls really discontinuous?
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