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 Measurements on the entire universe
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High School Does gravity cause time dilation?
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High School Enlarging Planetary Orbits: Evidence of the Solar System's Evolution?
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Undergrad Reference point of geocentric lunar latitude?
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High School Star trails and the Earth's movemement
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High School Is Inertia Tied to the Stars According to Mach's Principle?
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Undergrad What would happen if I were 1 ly from a black hole merger?
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Undergrad Why Does Physical Space Have 3 Dimensions?
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Undergrad What is the significance of systematic redshift and Mg II in astrophysics?
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Undergrad Why Doesn't the 11-Year Solar Cycle Affect the Sun's Magnetic Field?
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High School Is the concept of a multiverse just science fiction or a scientific possibility?
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Undergrad Why do galaxy and galaxy clusters look so colorful?
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High School Would All Observers See a Warp Drive Spaceship at Constant Speed?
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Undergrad Time Scale -- Does Time have uniform Scale?
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Insights What Is the Cosmic Background Radiation?
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Undergrad Is there a consensus about the nature of dark matter?
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High School Nothing, something and the Universe
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Undergrad Problem interpreting a Distance-Redshift Plot
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Undergrad Dark matter and black hole interaction
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Undergrad Neutrino flavour eigenstates and expansion of the universe
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High School Will Michigan Ever Get An Eclipse
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Undergrad Explain about the information lost through black hole
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Undergrad Comoving distance and redshift relationship derivation
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Undergrad Could the Light Crowd in Orbiting Black Holes Over Billions of Years?
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Undergrad How stuff in empty space cools down?
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High School Question About The Stars -- Can they have died before we see their light?
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Undergrad Experimental bound on the scalar spectral index
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Undergrad Photon Sphere and time travel around a Black Hole?
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High School Could Our Location in a Supervoid Alter the Hubble and Acceleration Parameters?
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Undergrad Large wavelength and "fitting into" small spaces
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Undergrad Why Aren't Galaxies Formed After the Big Bang Referred to as Being Further Away?
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Stargazing Dragon + Falcon 9 visible from Western Europe Saturday
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High School Why is the low entropic state of the early universe a puzzle
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High School Earth-Sun Lagrange Points Distance Query
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Graduate Do Friedmann-Lemaitre Equations Determine the Shape and Fate of the Universe?
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Undergrad Supernova - What would you see if watching one from close by?
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High School Did we just discover the Milky Way is in middle of nowhere?
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High School General Relativity Aces a Test at Supermassive Black Hole
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Undergrad Possible retrocausal events and time paradoxes
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High School Hubble's constant and Minkowski spacetime
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Undergrad How Black Holes Form: Neutron Collapse & Supernovae
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High School The Hottest Giant Planet Yet: 7800 degrees F.
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Undergrad Red shift and the maths for gravity
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Graduate Some questions about the PFSS model on IMF
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Graduate How To Do Fisher Forecasting For Constraining Parameters
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High School Relationship Between Density and the Hubble parameter
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Undergrad Why use velocity dispersion in Faber Jackson relation
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Undergrad Are Aliens Listening? Evidence for Intelligent Life in Space
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High School Our solar system and its fellows
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High School Understanding Re-entry Perturbations After Inflation
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Undergrad I cannot figure out what I saw in this picture, help me
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High School What is the atmospheric pressure on Pluto and how can it sustain gases?
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Undergrad Direct collapse to black hole without supernova?
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High School What Drives the Accelerating Expansion of Space?
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High School Singularities forming universes?
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Undergrad Why does physical space have to be three-dimensional?
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Undergrad Does the Planck length expand in a FRW universe?
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Undergrad What are the alternative theories for the end of the expanding universe?
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High School Map of Solar System: See How Far Away Planets Are!
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Undergrad About the Entropy of the Universe
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Undergrad New Gravitational Wave Detection question
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High School Where Did the Energy Go in Light Waves When the Universe Expanded?
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Undergrad Questions regarding dark matter dynamics
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Pictures of extraterrestrial space
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Undergrad Life permitting ranges for fine tuning constants
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High School How do we know the size of the universe?
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High School Can Primordial Black Holes explain Galaxy formations
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Graduate What Are the Stationarity and Limitations of the Standard Accretion Disk Model?
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Graduate What Is a 'Black Hole' & What Does It Mean for Particles?
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Undergrad What is the lower bound constraint for G in terms of anthropic principles?
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Undergrad What happens to the information entering a Black hole?
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High School Does the expansion of space influence the passage of time across the universe?
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Stargazing Optimizing Polariscopic Alignment for Equatorial Mounts: Tips and Tricks
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Undergrad Where to find full core-to-surface profiles of stars?
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Insights Interview with Astronomer Pamela Gay - Comments
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High School First Direct Measurement of Brown Dwarf Mass Limit: 6.7% Sun
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Graduate Is the Universe Flat Without Volume?
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High School How Does Earth's Water Compare to Potential Ocean and Desert Planets?
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Graduate Calculating the power spectra of scalar perturbation
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Graduate Tension between recent dark matter results and Lux-Xenon?
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Graduate New ideas on the mechanism of solar CME's
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High School A Question about tiny tiny stars, and radiating heat
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Undergrad Can an Atom Become a Black Hole?
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High School Does the geometry of space really change with gravity?
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Undergrad Interesting controversy about inflation models of the universe
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Undergrad Centre of mass of the observable universe
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Undergrad Comoving mass density leads to linear cosmology?
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High School Cepheid Variable Stars and Space-Time Warping
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Undergrad Understanding the Formation of Stars: A Look at Gravity, Gas Pressure, and Heat
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High School How much effect does the moon's gravity/size have on Mars?
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Graduate Variation of Hubble constant in cosmological time
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High School Definition of unshifted spectral lines?
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Undergrad What is the Time Ordered Data set for CMB polarization?
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Undergrad Is the Force on a Particle in a Homogeneous Static Universe Always Zero?
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Undergrad Alexander Vilenkin spontaneous creation
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Undergrad Mercury's precession due to other planets
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Undergrad The Sun's habitable zone and orbital resonaces/stability
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High School Evidence for interacting dark energy from BOSS
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Undergrad How Does the Hubble Parameter Relate to Galaxy Movement?
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High School Earth may owe its birth to a solar eruption
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