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.
Graduate [Question] What would happen if gravity were removed?
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Graduate Does space-time form a closed manifold around a black hole?
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Is There a Correct Way to View the Universe?
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Graduate Argument against the existence of black holes?
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Undergrad Will the Moon's Recession from Earth Ever Cease?
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Graduate Very targeted question on multiple universes hypotheses
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Graduate Vacuum Metastability: Estimating the Lifespan of a False Vacuum”
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Graduate What does tidal gravity feel like?
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Graduate If the universe were sparked again
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Graduate How does inflation drive omega close to 1?
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High School Float & Fly Freely: Differentiating Space & Earth
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Planet positions and gravitational effects
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Graduate Separation of Multiple Universes?
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Graduate Is Gravity Truly Omnipresent and Can It Exist Without Mass?
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Graduate Is Time Truly the Fourth Dimension in Spacetime?
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Graduate Gravitational Red Shift at the center of a mass
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Graduate Primordial Black Hole as nucleus for gravitic atom
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Graduate Are Hot Jupiters in Stable Orbital Resonance?
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Graduate Unraveling the Mystery of the Sun's Composition and the Fate of Matter Within
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Graduate How Much Potassium Nitrate is Needed to Propel a 10 kg Rocket into Orbit?
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Undergrad Can We See All Galaxies in the Universe?
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Good wallpaper pics of our red sun from earth
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Undergrad Question about the color of galaxies & nebulae
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Graduate Determine body properties by visual spectrum?
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Graduate Extracting Energy from Cosmic Expansion
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Graduate What is the most detailed analysis of the very early universe?
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Stargazing Muon Telescope: The Universe's Secrets
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Undergrad Elliptical Orbit: Determine Foci & Missile Path
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High School Are There Any Other Educational Video Series Like 'The Mechanical Universe'?
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Undergrad The orbital eccentricity change of the Earth ?
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Graduate Learning Basics of Stellar Modelling
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Graduate Could Vacuum Energy Be the Key to Understanding Dark Energy?
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Who's the Top Expert in Black Hole & Time Travel Theories?
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I need someone who knows what nebulae look like well to look at these
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Graduate Intrinsic Redshift: Current Status and Research
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Graduate Habitable exoplanets of white dwarfs
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Graduate Lone wolf planets able to support subglacial ocean life?
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Graduate Mass Dispersion of Observable Universe
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High School Recent Supernova Sightings: Dates, Times, and Visibility
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Graduate Low mass post-main-sequence on HR diagram
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Graduate A problem from Binney and Tremaine
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Graduate Decreasing entropy of the universe
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Graduate What Happens When a Wormhole Ends Inside a Black Hole?
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A photon and a neutrino go into a bar
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Graduate Before the big bang the entire universe must have been a black hole.
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Undergrad Practical Cosmology: Examples of How it Helps Our Ventures
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Graduate Galactic angular velocity of interstellar cloud
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High School Why do comets tails come out of the front and curve around to the back?
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Graduate Is Infinity Plausible in the Universe?
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Novice Astrophotographer Discovers Supernova
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Laser pointer for start viewing: something affordable?
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Graduate Creating a MMO in the Universe: Spacetime Online
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Undergrad Could the Laws of Physics Change in a Universe with Different Matter Density?
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Graduate Were the First Stars in the Universe Fast Spinners?
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Undergrad How can you discover new things in Astronomy without a PhD ?
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Graduate Does light speed vary in different gravitational situations?
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Graduate Black Holes and Wormholes: Fact or Fiction?
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Graduate Wiltshire's Timescape model been refuted?
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Graduate How to Calculate the Heat Received by Newly Discovered Extrasolar Planets?
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Graduate Is the edge of our universe within our reach?
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Undergrad Would enough inert rock clumped together form a black hole ?
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Undergrad Acceleration in elliptical orbits ?
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Graduate Looking for reading material on extrasolar planet detection
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Graduate Expansion of space (conceptual question)
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High School Does moving at high speeds actually slow down time?
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Graduate Project in cosmology or theoretical particle physics ?
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Graduate Meteor radiant angle. Is this computation right?
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Undergrad Intro and a Question About Ellipticity
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Graduate Redshift from space expansion, & conservation of energy?
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Graduate What Should Be Discussed in a Report on Core Collapse of Massive Stars?
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Undergrad Space Debris Removal: Where to Publish Idea?
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High School Help with trying to spot the ISS
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Undergrad Does Traveling Through a Wormhole Violate the Law of Conservation of Mass?
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Undergrad What were the starting materials of the Big Bang?
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Graduate Star variable relations. In need of further insight
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Stargazing Huge difference between a 6 dobsonian and a 10 ?
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Undergrad Is the Old Model of the Universe Still Valid?
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Graduate Time according to whom, after the big bang?
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High School Help with Modeling Solar Wobble for Pre-Calc Project
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Stargazing Why can this telescope only focus on very near objects?
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Graduate Does Movement of Masses Distort Spacetime Differently?
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Graduate Is the Universe Infinite and Flat in Cosmology?
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Graduate Where's the energy go for planets axis inclined from orbital plane?
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Undergrad Start Learning Cosmological Math Today
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Graduate How Does Frame Dragging Affect Light Speed Observations?
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Undergrad What is the role of gravity in superclusters?
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Undergrad How Kepler derived that T^2 is proportional to r^3
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Graduate How much of galaxy redshift is due to gravity?
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High School What an Expanding Universe Looks Like
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Graduate Can Galaxies Have Two Nuclei Without Merging?
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Graduate Better Hubble Constant through Parallax?
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High School Odds of Finding Alien Life: An Exploration
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Graduate Is Noether's theorem applicable to the expanding universe?
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Graduate Can anyone please expand on white holes?
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Graduate Unraveling the Mystery of Dark Matter and Its Relationship with Black Holes
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Graduate Does dark matter fall into a black hole, and create radiation
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Graduate Can Some Galaxies Travel Faster Than Light?
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Graduate Could Black Holes Have Created Our Universe?
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Graduate Can Spacetime Equations Be Interfered With to Propel Mass?
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Undergrad How Much Longer Does an Atomic Clock Run on the Moon Compared to Earth?
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