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 Find Direction Between 2 Points: A & B
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Undergrad How Does Time Connect to Space in Our Universe?
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What is the Best Book for Learning About Astronomy?
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Undergrad Could Rogue Planets be an Alternative to Dark Matter?
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Graduate How Does Gravitational Time Dilation Work?
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Undergrad Outer planets always gas planets?
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Graduate What happens to time inside a black hole?
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Mysterious Red Shape on Google Earth
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Undergrad What is an equal-sun-elevation day called?
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Graduate Einstein's Gravity: Challenging the Traditional Concept of Forces
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Graduate Wormhole Physics: Can a Single Wormhole Have Multiple Mouths?
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What is next for the US space program?
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Undergrad What is the difference between the left and right pictures of a Quasar Core?
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High School Has a Star Collision Ever Been Observed in Our Universe?
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Graduate Are Black Holes sufficiently characterized?
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Graduate How do I develop physical intuition for the tidal force?
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Graduate Big Crunch. What happens at the moment the universe changes direction?
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Undergrad Asteroid Impact Crater Size: Function of Diameter
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Undergrad How Did Ancient Civilizations Accurately Predict Astronomical Events?
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Graduate How Can Quasar Beams Emerge from Black Holes Despite the Event Horizon?
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Undergrad Measuring time in the 17th century.
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Undergrad What's the opposite of a blackhole?
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Graduate Dark matter exerting a gravitational effect on earth?
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Undergrad Calculating the size of planets from length of days.
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Graduate Is the Expanding Universe Slowing Down According to Age?
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Undergrad Is Faster-Than-Light Space Travel Possible with New Technology?
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Undergrad Are Asteroids Outside Our Solar System and the Moon Affected by Impact Tsunamis?
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Graduate Light approaching the event horizon
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High School Do Galaxies Move? Rotation Around Something?
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Undergrad What are the consequences of pole reversals on Earth
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Graduate Satellite's Tidal Force & Orientation: Can It Affect Interlock?
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Undergrad Gravity Revisited: Earth-Moon & Earth-Sun Comparisons
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Graduate Baby Universes? - Leonard Susskind's Hyperspace Theory
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Undergrad What methods are used to CONFIRM the compisition of a star from spectral lines?
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Undergrad Why the plane of the rings is vertical to the rotation axis of Saturn?
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Graduate Understanding Time in Physics: Questioning the Effects of Gravity on Black Holes
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Graduate Can a collapsing star only form a black hole if it has a companion?
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Graduate Thinking Outside of Space: Big Bang Theory and Beyond
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Graduate What Happens When You Increase an Extremal Black Hole's Charge?
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High School If we have two parallel plane in the space in addition to another two
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Undergrad Physics of a satellite orbiting the sun
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Undergrad Elliptic orbit of earth round the sun
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Graduate Need VERY recent paper in observational astronomy for journal club presentation
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Graduate Black holes and Event Horizon: Q's ?
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High School Planets in Deep Space: Can They Escape Orbit?
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Graduate What Happens at a Black Hole Singularity?
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Stargazing What type of binoculars are best for stargazing in a light-polluted area?
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Graduate What Would You See at the Threshold of the Expanding Universe?
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High School Do Stars Flicker Colour & Intensity in the Night Sky?
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Graduate Molecular Cloud Clumping Question
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Undergrad [QUESTION]Dark energy could it be an explosion?
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Graduate [Question] What would happen if gravity were removed?
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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 What does tidal gravity feel like?
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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 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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Stargazing Muon Telescope: The Universe's Secrets
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Undergrad Elliptical Orbit: Determine Foci & Missile Path
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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 Low mass post-main-sequence on HR diagram
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Graduate A problem from Binney and Tremaine
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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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Novice Astrophotographer Discovers Supernova
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Laser pointer for start viewing: something affordable?
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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 How to Calculate the Heat Received by Newly Discovered Extrasolar Planets?
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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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High School Does moving at high speeds actually slow down time?
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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 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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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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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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