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.
Stargazing Problem about calculating focal length of a telescope
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Undergrad Unraveling the Chaos: Examining the Birth and Behavior of the Universe
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Undergrad Space Time Expansion: How Galaxies Formed
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Graduate Is Newton's Law a Result of Constant Volumetric Expansion?
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Graduate Interstellar Medium Around Sol / Interstellar Ramscoop
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Graduate Is eternal inflation possible in LQC?
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Undergrad 10 light years but destroyed 6000 years ago?
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Graduate Dark matter/Dark antimatter Asymmetry?
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Graduate How is energy/matter density distributed through the universe?
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Graduate Dark Matter: Interacting Particles & Gravitational Forces
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Undergrad What is the width of the Lagrange points?
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Graduate How much mass does 'Dark Matter' and 'Nothing' (empty space) have?
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Graduate Is the proper distance the shortest distance in FLRW universe?
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Graduate Why Doesn't Dark Energy Expand Galaxies?
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Undergrad Good Introductory Book/Article to Dark Energy?
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Graduate Proposed dark matter detector - how does it work?
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Graduate Can Space Expand Faster Than the Speed of Light?
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Undergrad Do scientists know why planets orbit stars on the same dimentional plane?
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Graduate Why Doesn't the Comoving Hubble Length Always Increase?
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Graduate Size/Mass of a planet needed in order to have a molten core or a magnetic field?
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Undergrad Speed Of Light In Relation To The Size Of The Universe
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Undergrad When did they discover the Gas Giants were fluid?
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Graduate Kepler's Equation and its choices
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High School How many degrees of view is cosmic microwave background?
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Graduate Question about the expansion of space.
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High School How do you define a planet's rotation?
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Graduate Pulsar Spectrum: The Mystery of Neutron Star's Black Body Emission Revealed
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Graduate Need Help Writing a Sci-Fi Film Plot with Astronomy
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Graduate Did all 10^80 particles exist after the first 3 minutes?
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Undergrad What happens to you if you get pulled into a black hole?
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Graduate How is it possible to live past the event horizon?
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Graduate Creating Artificial Gravity for Spacecraft Travel
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High School Night sky and supernova questions
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Undergrad How is molecular hydrogen detected?
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Undergrad Angular momentum and eccentricity
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Graduate Life in the process of universe: the goal or just a side effect?
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Graduate Is the universe 13.7 Billion years old? There seems to be a contradiction
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Graduate An Infinite Lapse of Time is Impossible and Unscientific
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High School Pluto's color changes as it makes its closest approach?
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Jumping into a earthcenter tunnel
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Undergrad Speed through the universe we are moving?
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Undergrad Is the Expanding Universe Affecting Our Solar System?
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Graduate What is the system of angular units used by astronomers of Venus?
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Graduate Could we see Earth 75.2 years ago using light from a supermassive black hole?
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High School What Were the Two Bright Yellow Lights in the Sky on July 10th?
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Graduate Can Negative Changes in Entropy Occur in the Universe?
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High School Is the Universe Really Flat and What Lies Above or Below the Earth?
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Undergrad Is this a misleading representation of boomerang results
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Graduate CERN particle announcement related to dark matter / energy?
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Graduate Why Are Galaxies Rushing Apart According to Weinberg's First Three Minutes?
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Graduate Other dimensions have been proven .
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Graduate Measuring the Accuracy of EM Spectrum Shift: Red vs Blue
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Undergrad Calculating orbits of moons, when both the planet and star are involved.
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Graduate How Flat is Our Universe Really?
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Graduate Does a Space Warp Bubble Move Through Space or Does Space Move Around It?
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Graduate Questioning Hubble's Law: Does the Expanding Universe Theory Hold Up?
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Graduate Cosmological expansion vs. stretching
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Graduate Dark energy related to 10-dimensional universe
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Graduate Could the Universe Have Regions of Expansion and Collapse?
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Graduate Post big bang matter/energy distribution
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Graduate Can black holes be disintegrated from a sufficiently powerful explosion?
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Graduate Imposssible to see light that left a star 13.4 billion yrs ago
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Graduate Dark Matter - How strong is it at a galaxy periphery?
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Graduate Why is a gravitational field negative energy ?
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Undergrad Gravity in the Universe: Is There a Weakest Force?
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Undergrad Size of the Universe? I'm confused.
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Graduate Would the universe be the same if it was reset?
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Undergrad Calculating distance from redshift
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Graduate In what sense is the standard model enormously successful
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Undergrad Dark matter is the thread connecting galaxy clusters
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Graduate Plotting planetary movements through space
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Graduate What is the universe itself made of beyond its contents?
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Is This CM Book by Roy on Orbital Motion?
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Graduate Is Our Universe Just a Balloon in an Infinite Matrix?
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Graduate Explosion picture: most common mistake
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Graduate Did a Higgs Boson trigger the big bang?
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Graduate Calculating the Size of the Universe
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Undergrad Critical density in our expanding universe
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Graduate Could dark matter be invisible bound states of ordinary matter or ehm, aliens?
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Graduate Is the Universe Spinning? | General Relativity
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Graduate Is the Sun's luminosity in specific filters greater than its overall luminosity?
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Undergrad Venus Spinning Slower Than Thought
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Graduate Eight steps to the understanding the CEH
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Graduate Why is the Universe electrically neutral?
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Graduate Exploring the Properties of Gravitational Waves: Evidence, Structure, and Speed
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Undergrad What if time is not linear? Can it be experienced out of sequence?
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Graduate Calculating Force and Energy Requirements for a Reactionless Drive in Space
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Graduate Higgs & Inflaton: Does New Boson Discovery Change Anything?
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Undergrad Is space really absolutely nothing?
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Graduate What Does Density Contrast in the Universe Mean in the Context of Chaplygin Gas?
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Graduate What is absolute in this universe?
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Undergrad Distance time travels per second
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Undergrad Is there any cosmological research field concerning signal processing?
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Graduate The theory of Cosmological Relativity by Dr. Moshe Carmeli.
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Undergrad Is Dark Flow Considered a Fringe Theory?
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Graduate Finding the Optimal Time to Launch a Mission to Mars
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Undergrad How does one descibe a co-orbiting system?
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Graduate An Infinite Time's Arrow is Impossible and Incompatible with Scientific Theory
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Graduate Will Neutron Stars Last Forever Without Proton Decay?
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Undergrad Why are black holes shaped like hurricanes?
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