Astronomy, Astrophysics, Cosmology Forum

Undergrad What is the refractive index of the Universe?

Graduate Alignment of Quasar Polarizations 0507274

Undergrad How does the expansion of the Universe affect black holes?

Graduate How Can I Find Correction Factors for Tropical Years in Historical Data?

Graduate Analysis Paralysis: A Must-Read Paper on Cosmology Theory/Data

Graduate Historical reprint/coverage papers requested

Graduate Interesting video on infrared modifications to gravity

Graduate Observational constraints on quarks in neutron stars

Graduate Could dark matter be composite baryonic objects?

Graduate How unitary cosmology solves the inflationary entropy problem

Graduate Copeland et al. review omits holographic dark energy models

Graduate Black hole accretion disk/jet reference

Graduate Lyman alpha forest different for different objects?

Graduate Black Hole Confusion: How Karen Masters Contributed

Graduate Recent papers on galactic evolution and metallicity

Graduate Escape Velocity in GR - PhysicsForums

Graduate Does the Thermoelectric effect apply in sun?

Graduate Centripetal forces and gravity

Graduate Were Mu Columbae and AE Aurigae ejected from Orion

Graduate Spiral Galaxies: Axes Alignment with Cosmic Voids

Undergrad Why is this Hubble plot linear for Omega=2 closed universe?

Undergrad What will eventually happen to all EM waves / photons?

High School Wow. Great picture of exoplanet HR8799e - 129Ly distant

Graduate How does the electromagnetic force influence a galaxy (if at all)?

Undergrad Some comments on the 2019 Planetary Defense Conference

Graduate Saturn's hexagon and his accretion disk jets

Undergrad Fitting a SiII curve in a supernova spectra

Undergrad Are MOND Equations Consistent Across Sources?

High School What Causes Meteor Showers and How Can You See Them?

High School Can a Stronger Black Hole Turn a Weaker One into a White Hole?

Undergrad For astronomers, what software/languages do you use to handle data?

Graduate Galaxies without dark matter rule out modified gravity theories

Graduate How does one compute frequency bandwidth based on FWHM

Undergrad Was Dark Energy Dominant Over Matter in Early Universe?

High School The singularities of gravitational collapse and cosmology

Undergrad Does the newly measured expansion rate change the odds for Big Rip?

High School What are these bright spots in this zoomable image of the Milky Way?

Undergrad How do we measure expansion if we see distant galaxies in the past?

High School How to find inverse steradian from arcmin^-2 for density of galaxy

High School If the universe were played in reverse, how would it differ?

Undergrad Universe younger and faster than thought

Undergrad Will the Big Rip basically be the Big Bang for the next universe?

Undergrad What is the Most Accurate Mass for Rigel?

Undergrad Discovering Sedna: The Mysterious Red Planetoid Orbiting the Sun

High School How prevalent is the R language in astronomy research?

Undergrad Why are pictures of galaxies so clear?

Graduate Interplanetary electromagnetic field

Undergrad Is the age of the Universe "boundless"?

Graduate Dark Matter Halo + Virial theorem Q.

Graduate Different FRW Cosmological Models

High School What A White Hole Will Look Like?

Undergrad Provide me the paper by Peebles,P.J.E 1980 and 1993

Graduate R136a1: The Most Massive and Luminous Blue Hypergiant Star

Undergrad Typical light levels at Mars's surface

High School What does 4 D spacetime look like?

Undergrad Helium Hydride data, Early universe chemistry evidence?

Graduate Recent mass estimates for Milky and the Local Group

Graduate How Many Stars Can Detectable Wobbles Reveal Extrasolar Planets?

Graduate Anti-Matter- Regular Matter- Pulse Collisions?

Graduate Black hole singularities and negative space-time

Graduate New and Improved: Elliptical Transfer Orbits determination procedure.

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Graduate Calculating the Sun's Bending Angle on a Ray of Light

Stargazing Our absolute speed in the cosmos

Graduate Coronal Rain -- an interesting article

Undergrad How can an expanding Universe look homogeneous?

Undergrad Could a fully convective Sun double its lifespan?

Graduate Abundance and mass spectrum of PBH

High School [Curiosity] Are there any central databases of Red Shift?

Stargazing Short videos on the Messier catalog of deep sky objects

Undergrad Why the Moon always shows the same face

Graduate Why the fine-tuning argument for improbable existence is a fallacy

High School A different take on the M87 black hole

Undergrad Disappearing lakes on Titan - seasonal cycles

Undergrad Uncertainty Over Sextans Galaxies' Group Membership

Undergrad Are Galaxies Gravitationally Bound?

Undergrad Does a solar eclipse gamma of 0 mean eclipse goes through 90° altitude?

High School Any updates on the first-ever Parker perihelion results?

High School Could accelerating expansion be caused by a "spinning" universe?

Undergrad What distance from a black hole feels safe?

High School How common for almost same solar eclipse 17 months later?

Undergrad M87 Black Hole Photos and the Spin Orientations

Undergrad Can black hole studies shed any light on dark matter

Undergrad Is the Divisor (2π)^3 Necessary in Photon Gas Equations?

Graduate How can space or vacuum condense into strings?

Graduate Can Space Itself Store Energy?

Undergrad Orbital velocity of a craft at 4km above the Moon's surface

High School First image of a black hole

Undergrad Observation of the Messier 87 Super Massive Black Hole

Undergrad Could the kinetic energy of space junk be recycled?

High School Gravitational Wave Interference Graphical Computer Simulation

Undergrad Dark Plasma charged under unbroken U(1)' gauge interaction

Graduate Ideas for determining the volume of a rotating object

Insights How to Create a Universe - Instructions for an Apprentice God - Comments

High School Earth Orbits of Geostationary Satellites

Undergrad New LIGO/Virgo event (08-Apr-19)

Undergrad Probability distribution of angle of asteroid entry to the atmosphere

High School Temperature regulation in Earth orbit

Undergrad What is the minimum mass of a neutron star?

High School Orbits of galaxies in the Coma Cluster