Astronomy and Astrophysics Forum

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Join in expert discussion on the topics of Astronomy and astrophysics. This may include discussion on celestial objects, space, and the physical universe as a whole. Mainstream science only.
Undergrad Understanding Redshift: Mathias' 15-Year-Old Query
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Graduate Is our universe inside a blackhole?
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Graduate Can an eccentric planet be habitable?
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Graduate Colliding Black Holes: Antimatter vs Normal?
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Graduate If the earth's core was to abruptly turn solid
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Extra-Terrestrial Life Discovered in Outer Space
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Undergrad Calculation the orbital period of Moon.
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Undergrad How light travels such long distances?
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Graduate Why does the galaxy LEDA 074886 appear rectangular?
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High School How to Improve Your 8th Grade Paper on the Collision of Two Galaxies?
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Graduate Black holes and the centrifugal force paradox
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Undergrad List of Stars and Objects equating Names
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Graduate How Did The CCCP See Past Venus' Clouds Prior to Landing?
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Graduate Why Does Gravity Around a Black Hole Remain Normal Until Extremely Close?
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Undergrad A quick question about Elliptical/Circular Orbit
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Must Watch Solar Flare Video - Stunning Detail!
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Graduate Flux Limited Sample: What Is It & Why Use It?
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High School Is There Really a Second Sun in Our Solar System?
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High School Questions about my stratosphere photos
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Graduate Another issue with the Hawking equations
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Stargazing Buying a Telescope: First-Time Advice
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Why haven't we gone back to the moon?
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Undergrad Does Gravity Have Lines of Force Like Magnetism?
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Undergrad How Do Scientists Distinguish Between Red Shift and a Red Dwarf's Natural Color?
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Undergrad University project for astrophysics
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Graduate Why does the amount of dark matter increase the further away from the
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August 18 - Conjunction of Venus and Jupiter
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Laniakea: Our home supercluster (video)
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Holy Close Call Batman, asteroid 2014 RC
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Graduate What is the Multiverse and How Does it Impact Our Understanding of Physics?
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High School How High is Space? Astronomy Facts
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Graduate Does the Universe Exist if We're Not Looking?
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High School When I look at the Milky Way, what am I looking at?
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Stargazing Is a Telescope Worth Buying for Limited Sky Visibility?
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Graduate Light propagates faster than the rate of expansion of the universe?
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Graduate What is the mass and equatorial radius of the Crab Pulsar?
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Graduate Where to Begin Coding for Smoothed Particle Hydrodynamics Simulations?
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Undergrad Do two masses gravitate to their centre of mass
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Stunning Summer Vacation Photos: Starry Skies, Thunderstorms, and Perfect Waves
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Undergrad Water Clouds Tentatively Detected Just 7 Light-Years from Earth
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Graduate Estimating the age of the universe not knowing its size?
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Undergrad Is Zero the Most Ideal Value on a Number Line?
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Undergrad The Pleiades Controversy Erupts Again
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Undergrad Low-eccentricity orbits and the Plane of the Elliptic
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Graduate Chandler wobble: nutation or precession?
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Graduate Mass radius relationship for SIRIUS B
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High School Measuring the current Longitude and Latitude of your current position
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Graduate How are solar particle events predicted? And related to flares/CMEs?
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Undergrad Map or a Listing of All the Constellation Boundaries in Right Ascensio
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Graduate How many dimensions are there to space time?
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Graduate Cosmic Redshift & The Redshifted Photon
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Graduate Is 16.4 GHz a Significant Frequency in Radio Astronomy?
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Undergrad Calculate Area of Ellipse in Keplerian Orbit
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Graduate Could a Rotating Supernova Cause Another O-S Extinction?
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Graduate What Are the Community's Theories on Dark Matter?
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High School Can Astronomers Predict when a star will explode?
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High School Is it true that if two pieces of metal touch in space
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Undergrad Why do all the planets orbit in the same plane?
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Graduate As I Was Looking At A Strange Black Hole Image I Wondered
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Undergrad Can Gas Giants' Atmospheres Ignite Without Oxygen?
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High School How long could life on Earth survive if the sun went out?
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Undergrad Geocenteric Equatorial Coordinates of the Sun
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High School Chelyabinsk Meteor Strike: How Bright Was It?
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Undergrad Do we live in a black hole(or an white hole)
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High School Can a planet have different levels of gravitational pull
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Graduate Making new sense of the three-body problem
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Graduate Answer: Find Second Moment of Mass & Energy for a Taurus w/E=mc2
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Graduate Who Determined the Phase and Period of Epicycles in Greek Astronomy?
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Graduate Are There Documented Polarities in Comets' Magnetic Fields?
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Graduate Rational ratio of frequencies leads to isolating integral of motion
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Undergrad How do we know the orbits of the planets?
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Undergrad Creating an equation of a 2D path of an orbit
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Undergrad The Most Distant Star in the Milky Way
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Undergrad Perfect Full Moons" - Find Date & Place to See Rare Celestial Event
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Graduate Conservation of mass and black holes
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Undergrad Question about space travel and the human body
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Graduate Unidentified emission line in Galaxy Clusters
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Graduate Direct detection of dark matter?
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Undergrad What is Specific Intensity in Astrophysics?
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Stargazing Cleaning a Telescope's Mirror: Tips and Techniques
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Stargazing Designing a Telescope: What Equations Do I Need?
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Graduate Need help finding exact time of planet aspects with Jean Meeus library
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Graduate Minkowski Space: Can Objects Have Same World Line?
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Graduate Black Holes & Infinity(Singularities)
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Graduate Calculate Interstellar Rock Orbit in Solar System
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Graduate Solar Gravity: Is There Good Data?
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Undergrad Why does'nt SUN burst like a baloon and collapse?
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High School Scale of the universe if a star was a grain of sand
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Undergrad Does Aluminum Coating on Telescope Mirrors Turn into Aluminum Oxide?
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Undergrad Calculating latitude and longitude at any time
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Did Humans Go to the Moon? A Debate
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Graduate Could Space Topologies Unify Matter and Energy in a Curved Cylinder Model?
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Graduate What is Kepler-70b's surface like?
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Undergrad Could our solar system exist 100x bigger?
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Graduate Would tardigrades survive on Titan?
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Graduate Calculating Artificial Gravity for a Rotating Space Station
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Undergrad What are some recommended books on white dwarf stars?
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Graduate Atmospheric Transmittance Venus?
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Graduate How do they define luminosity function in astrophysics?
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Graduate What is the Lorentz transformation
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