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.
High School Does Space Need to Be Filled for Distance to Exist Between Two Objects?
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Undergrad Astro Physics Research for Undergrads
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Graduate Relationship between dark energy and the strong force
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Undergrad Can quasar gets converted into pulsar?
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Graduate What value is expected for baryon to photon density?
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Graduate How Is Satellite Orbit Speed Calculated with Atmospheric Resistance?
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Graduate Images of the Universe: Lasting Through Time
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Stargazing James Webb Telescope capability ?
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Graduate Planetary Axis Stability: Examining the Role of Moons and Other Factors
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Graduate Collision course trajectory / velocity
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Undergrad G-Forces in Space and the Human Body
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Undergrad Relation between the sol, mass, gravity, and black holes
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Undergrad Heliosphere's Long-theorized Bow Shock Does Not Exist
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Graduate Need specific Hubble images. Archive does not have them.
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Undergrad Position of the Sun and Moon in ECEF coordinates
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Undergrad Can gravity increase on its own?
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Graduate How are measurements done in the Doppler Orbitography Radiopositioning
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Graduate Is the Universe Infinite or Just Expanding?
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Graduate Series of GR questions about universe expansion
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Graduate Are black holes the great organizers of the universe?
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Undergrad Gravitation - Why don't planets smash into each other?
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Undergrad Mysterious Night Sky Object - Help?
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Graduate Question about supernova kinetic energy
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Graduate Dim Stars: Are There Almost-Black Holes in the Universe?
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Graduate Is the multiverse cosmology or metaphysics?
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Graduate Assumption that Anti-Matter Galaxies Would Emit Detectable Gamma Ray Bursts
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Is it possible that Our universe could be a tiny spec in a say, sandbox?
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Graduate Would Jupiter steal matter from our Sun when it reach red giant phase?
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Graduate What Causes Stellar Expansion During Hydrogen Fusion?
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Graduate Pair-instability supernova calculation
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Stargazing Solar and Lunar Eclipse - size of moon
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Graduate One of the standard candle methodologies
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Graduate Do Neutron Stars Eventually Decay Into Black Holes?
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Undergrad Why Are Red Giants More Luminous Than Other Stars?
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Graduate What Physics Laws Govern the Rotation of Astronomical Structures?
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Undergrad Are All Stars the Same Size Due to Nuclear Fusion?
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Undergrad Question about detection of very far away objects
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Graduate What is the equation for high (cosmological) redshift?
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High School Can anyone help me disprove something
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Undergrad Is Oxygen More Abundant Than Carbon in the Universe Due to Nuclear Fusion?
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Undergrad How to calculate g-forces on pilots in climbs, dives, outer space
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Graduate Could dark energy be used as an antigravity device?
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Undergrad When does helium fusion occur in an evolution of star?
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High School Objects in Space: Does Microgravity Change the Rules?
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Graduate Calculating Historical Positions of the Asteroid Belt's Orbit
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Graduate Is Hawking Radiation inherently unimportant?
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Graduate Sunrise and sunset correction for astronomical and geographical factors
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Graduate Warp Drive & Bubble Theory: Can You See & Touch It?
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Stargazing Using a Telescope: 30X Power for Planets & Moons
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Graduate Black Holes: Infalling Observers and BH Evaporation
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Graduate Size of fictional planet based on gravity and density
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High School What happens to the missing time?
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Graduate Redshift and Expansion of the Universe
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Satellite Purchase: Critical Help required
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Stargazing What creates the star points in telescope pictures of stars?
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Graduate The universe total energy and the conservation of energy
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Graduate Calculating Pluto's Orbital Time Above/Below Ecliptic
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Graduate Question about white/black holes
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Undergrad Why Do We See So Many Gamma Ray Bursts?
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High School Is This a Solar Flare?" - Investigating Possible Phenomenon
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Undergrad How delicate is the Earth's Orbit?
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Graduate Calculating Tithis in the Hindu Calendar - Petrix108's Query
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Undergrad Classification of stars by spectrum
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Undergrad Measuring Radial Velocity with Amateur Equipment
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High School The dereference between; astrophysics, astronomy, cosmology and space science
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High School Gravity between the Earth and the Moon
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Venus passes in front of our sun
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Undergrad How are panatery Nebula formed and when do they die
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Graduate How to Compute the Length of a Year on Earth in a Two-Body System?
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Undergrad The stellar evolution. Low Mass stars
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Graduate Accretion disk/black hole/gas jets
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Undergrad Why Do We Use Angular Size Instead of Steradian for Objects in the Night Sky?
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Graduate Is anything falling into a black hole *now*?
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Graduate VLBI SETI: Detecting Signals in Gliese 581 System
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Undergrad Spectrum of Stars: Explaining the Spectral Lines of Stars
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Undergrad What causes the pressure in a neutron star?
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Undergrad Width of Spectral Lines: Explaining Main Sequence Star Determination
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Undergrad So much of diversity in universe.
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Graduate What Causes the Beamed Emission of Pulsars?
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Graduate How do accretion disks and black holes interact with electromagnetic forces?
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Graduate How Do Low Mass Stars Evolve After Exhausting Hydrogen Fuel?
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Graduate Messenger particles and black holes
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Undergrad Definition of a Planet (and other stuff)
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High School Question about momentum in vacuum of space
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High School Astronomical-objects outside our own galaxy
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Graduate Patched Conics Trajectory from Initial Orbit State
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Graduate Universe structure, movement, creation/destruction
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What is the scale of our universe?
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Graduate Asteroid orbit determination from observations
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Undergrad Can anyone recommend any astronomy books
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Graduate How does frame dragging cause a stick to rotate in the opposite direction?
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Graduate More exact prediction of collision with Andromeda galaxy
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Undergrad Transiting Exoplanet Light Curve
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Undergrad What Does a Redshift Calculation of 2.5 Mean?
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Undergrad Length of the life of a red supergiant.
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Undergrad The Mystery of the Universe's Fate
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Undergrad Does 4th Dimension Space Really Exist Beyond Our Perception?
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High School Law of Gravity & Stars in Galaxy
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High School Calculating how long ago light was emitted from a star?
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Graduate Revamping general concept and cosmological principle
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