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.
Undergrad Are there galaxies with 2 cores?
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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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Stargazing Is it nebulosity or an artefact?
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High School How do astronomers find the "parallax angle" of a star?
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Stargazing For those aurora chasers -- a heads up
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Undergrad Is the Friedmann Space-Time Observable Without Dark Energy?
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Graduate Working with Keplerian Elements & Deriving Vernal Equinox
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Graduate New high-redshift quasar age issue
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Undergrad Transit Photometry: Questions about Detecting Exoplanets
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High School Spacetime Geometry: Understanding Causality & Effects
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High School Unitarity and Entanglement: Examining the Fate of Information in Black Holes
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Undergrad How long would it take for gas to leak out of a space box?
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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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Graduate How to calculate ambient temperature in space or in orbit?
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Undergrad Quasar Number Densities and Lifetimes
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Undergrad Is high redshift data a problem for ΛCDM?
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High School Optical eyepieces for star observations
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Undergrad Why Hasn't Mars Ice Core Samples Research Been Attempted?
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Undergrad Why is neutron star interesting to physics ?
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Undergrad What happens if two black holes collide
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High School Big Bang Wasn't the Beginning? Study Proposes Alternative....
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Undergrad Why is the time of formation of this Black Hole in question?
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Undergrad Fly-by anomaly is back with Juno
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Undergrad What is the Cause of Space Expansion?
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High School Are there any SPH planet collision simulators?
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Undergrad Action Dynamics of the Local Supercluster
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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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High School How did this Black Hole come to exist?
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Undergrad Will the acceleration of the expansion of universe ever decrease?
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Undergrad Can Hubble Red Shifts be Gravitational Red Shifts?
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Undergrad Holographic principle versus no-cloning
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Undergrad GW170608 - Another Binary Black Hole Merger Observed
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Undergrad Maintaining interest in the new 'private' space race
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High School Balloon Analogy - 3D universe on a 2D plane
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High School Life is less likely on exoplanets
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High School Debate about how a light year can be used
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Undergrad CMB and the reference point for vacuum energy
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Stargazing Southern Sky Image: View the Southern Cross, Coal Sack & Omega Centauri
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High School Can the Sirius Star System Support Physical Life Amidst Its Unique Conditions?
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Graduate What Factors Influence the Habitability of Exoplanetary Systems?
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Undergrad Tidal effects on Earth's rotation and moon's orbit
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Undergrad Do Solar Tides affect Earth's Orbit?
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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 Simulation: Our Solar System's Hyperbolic Residents
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High School Jupiter's gravitational pull on the Sun and Earth
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High School What would happen if you take a piece of a pulsar
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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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Undergrad Where in our solar system are asteroids that contain ammonia
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Undergrad Unraveling the Mysteries of Gravity: From Light Bulbs to Spiral Galaxies
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High School What if the universe's expansion is actually slowing down?
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Undergrad Can we experimentally understand the interior of a star?
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High School Dark matter not found in globular clusters orbiting MilkyWay
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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 Dark matter and energy may not exist?
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Undergrad Could vacuum decay save multiverse ideas?
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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 does wobbling in BGC reveal about the nature of dark matter?
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Stargazing How hard is it to find filtered color bands using telescope?
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Undergrad How Bright Would the Milky Way Look If It Had No Dust?
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Undergrad What % of the heavy elements are produced by kilonovas vs. supernovas?
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Undergrad What is the universe expanding into ? Eternal inflation
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Graduate Milancovitch cycles and how they relate to seasons
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High School Spacetime: Real or Not? LIGO Lab Explores Ripples
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High School Gravitational Wave Stretching: LIGO Arm vs Light
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High School Did a Star Go Supernova Twice?
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Undergrad Magnetic field of Solar System planets
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Undergrad Does Entropy Change on Horizons?
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High School Acceleration of a proton/electron toward a neutron star
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High School The bizarre rotation of galaxies
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High School Sun's Expansion: Why Inner Planets Will Be Affected
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Undergrad Exoplanet Climate: Can Planets Have Multiple Liquid Layers?
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Graduate What would happen if dark energy was injected into a black hole?
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High School Could a brown dwarf passing through our solar system ignite Jupiter?
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Undergrad How to derive number of nucleons in Universe?
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Undergrad Resemblances between moon surface and earth mantle
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Undergrad Why is the Sun Yellow/Orange and Not White?
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Why aren’t more people interested now in physics & astronomy
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Undergrad Determining The Inclination Angle of A Stellar Binary System
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Stargazing Impact of Kepler Telescope Findings on the Drake Equation
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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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Undergrad First Chinese space station about to de-orbit soon
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Graduate Is the Higgs Field Vacuum Energy Density Negative?
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High School Is a planet's crust distinct from mantle because ....
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