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 What Caused the Asymmetry Between Matter and Antimatter in the Early Universe?
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Graduate Solving Extinction and Reddening in Photometric Analysis of M5 Globular Cluster
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Graduate How do you derive the tidal force equation?
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Graduate Estimating Planetary Cooling Times
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Undergrad How to calculate the position of stars
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High School Earth's distance from the galactic center?
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High School Classification of Stella Spectra
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Graduate Understanding Hagedorn Temperature: Can Light Speed Up?
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High School Moon's Orbit: Moving Closer or Farther From Earth?
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Graduate Proof of three dimensional space
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Graduate Our sources of fear/anguish; permitted by the physical universe.
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Stargazing Venus and Mars: Did They Ever Cross Paths in a Terrestrial Eclipse?
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Graduate Sailing Through Space: The Technical Challenges of Interstellar Travel
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Graduate Is the CMBR Truly Uniform?
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Undergrad I'm confused about 1st Kepler's law and the 2 body problem
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Undergrad "Estimating the Age of a Black Hole"
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Stargazing Telescopes & Astronomy Magazines - Scientific American
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High School Why doesn't the asteroid belt block our view of the jovial planets?
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Undergrad What are the implications of Obama's space policy plan for NASA's future?
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Undergrad Explaining Mercury's Precession: Layman Terms
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Graduate Where is the energy coming from to push space apart?
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Graduate Is 'real space' merely a convenient mental representation?
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Undergrad Why is the density of Mercury 40% larger than the density of Mars?
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High School Is the Sun Dying? | Facts & Speculation
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Graduate Ways to accommodate modern cosmology
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Graduate Have You Considered Dr. Oliver Manuel's Neutron Star Model for the Sun?
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High School The most distant object that can still orbit the Earth.
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Graduate Existence of a small planet (theoretically)
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Graduate What is the average density of a rocky world according to Nilssen's Law?
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Undergrad Understanding Gravity Waves: Detected or Theoretical?
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Graduate Proto-Earth was ~230 Earth Masses
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Graduate Astro- modelling a white dwarf via polytrope
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High School Confusion over gravity and tides
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Graduate Dark Matter in the solar system.
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Graduate What is Nilssen's Law of Stars and how does it relate to star data?
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Undergrad Charge of Black Holes: Mass Dependency Explained
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Graduate Confusion regarding jargon in journals
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Undergrad Why are stars often found far from their birthplace in nebulas?
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Graduate Which from scratch? (group survey)
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Graduate Is the Net Density of Any Space Interval Ever Zero?
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Graduate Olbers' Paradox, the CMB and the observable universe
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Graduate Why Dark Matter and Dark Energy?
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Undergrad Google calculator impact on basic cosmo explanations
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Undergrad Kepler's 3rd law to determine mass of jupiter
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Undergrad Why Isn't Space at Absolute Zero Despite Its Vacuum and Low Temperature?
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Graduate Unique Roche limit and Saturn's rings
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Graduate Age and metallicity of Population I stars?
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Graduate Modelling density as a function of time?
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Graduate Conservation of angular momentum
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Meteor Fireball Sighted Over Edmonton, Canada
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Graduate Questions about Black Holes And Time
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Graduate Is Space Real? The Existential Question of the Universe
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Graduate Dimensions greater than the third?
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Graduate Hawking Raditation and particle-antiparticle pairs
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Graduate Recession of M81 and the M81 Group?
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Undergrad The Stephan's Quintet and Arp's Theories
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Graduate What Are the Six Puzzles Challenging LCDM Cosmology?
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Graduate Dark energy, vacuum, and uncertainty
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Undergrad Does Empty Space Contain Mass and Energy?
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Graduate Can photons create black holes despite being massless?
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High School Planetary Alignment: Will It Affect Us?
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High School Big Bang Questions: How Did Earth Form?
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Graduate Age and structure of the Universe
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Undergrad Cosmology Paper Ideas: Need Help!
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Stargazing Telescope Illumination: Mirror Diameter & Focal Length
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Graduate Explore the Mysterious Dark Photon
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Graduate Why Does Dark Matter Cause the Flattening of Galaxies' Discs?
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High School Stars in the Western sky in early evening
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High School Why Do Planets Travel in Elliptical Orbits Around the Sun?
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Graduate Confused about Imaging in Astronomy
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Undergrad Solar Wind and Its Impact on Planets
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High School How Can You Identify Meteorites?
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Graduate Mysterious Motion of Galaxy Clusters Detected
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Graduate Calculating Observable Universe Mass in the Lambda-CDM Model
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Graduate Building a Universe: Is Matter, Energy Purley Information?
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Undergrad What are the benefits of using interferometry for exoplanet hunting?
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Graduate Could Dark Matter Form Planets and Stars?
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Graduate Is the Universe Homogeneous or Isotropic?
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Undergrad What Prevents Air from Flowing Out of Earth's Atmosphere?
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Graduate Can Dark Matter Be Utilized for New Technologies and Applications?
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Graduate Large-scale Cosmic Flows & Moving Dark Energy: Beltran Jimenez & Maroto
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Graduate Big Bang vs Black Hole Singularity: Matter Compressed?
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Forensic Reconstruction of Copernicus' Face
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High School A star for every grain of sand.
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Undergrad What Atmosphere Would a Metal Planet Have?
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High School Can a Lost Space Toolbag be Filmed from Earth?
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Graduate How Does the Temperature of Hot Gases in Galaxies Support Dark Matter Evidence?
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High School Can anyone here please tell me about the sun dying?
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Undergrad Are All Stars Struggling with the Coronal Heating Problem?
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Undergrad Understanding how energy disappears
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Graduate Eccentricity & GR precession; Mercury vs. GPB
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Undergrad The Fourth Dimension: Introduction to a Book
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Graduate White Dwarf Cooling Model: Core and Atmosphere Temperature Relationship
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Graduate Create a large number of positrons in a small laboratory
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Stargazing New memeber, telescope question?
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Graduate Short questions about dark matter
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Graduate Is Newton's Bucket Proof of Absolute Space?
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Graduate What Causes Deuterium Fusion in Massive Planets?
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Undergrad Can you mathematically prove z = v/c?
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Graduate Orbiting Planets: True Anomaly, Argument of Perihelion?
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