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 Measuring Parallax Angle to the Method
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Undergrad Sky seen from a planet orbiting a star in intergalactic void
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Undergrad Introduction and Questions about Asteroid Belt/Jovians
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Undergrad The Basics Regarding : Planetary Orbits and Whatnot
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Undergrad How quickly did American researchers get data from Soviet probes like Venera?
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Undergrad Age of Universe: 13.7 Billion Years | How is it Calculated?
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Undergrad How Are Nebular Images Composed?
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Undergrad Approximating Ellipse Orbits with Newton's Law
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Undergrad Why Don't Jet Airplanes Heat Up Like Probes Re-entering Earth's Atmosphere?
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Undergrad Why do the lowest tides follow the full moon by a few days?
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Undergrad Instant communication between great distances?
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Undergrad Jovian planet with breathable oxygen atmosphere.
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Undergrad Understanding Cosmic Distances and Time: A Question on Stellar Measurements
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Undergrad Is the Net Flux from an Isotropic Source Zero?
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Undergrad How Can Spherical Trigonometry Help Calculate the Sun's Path?
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Undergrad Reasonable mass and surface gravity of fictional planet based on radius
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Undergrad Jovian Moons: Is a Small Jovian a Moon of a Larger One?
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Undergrad When the sun becomes a black dwarf
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Undergrad Space saver compartments with mechanical crank device
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Undergrad Doppler Shift at Right Angles Confusion
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Undergrad How did the planets acquire their spin?
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Undergrad Understanding Retrograde Orbit: Velocity Requirements for Artificial Satellites
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Undergrad Velocity of a star for Doppler Spectroscopy
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Undergrad A manned mission to Mars and its obstacles
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Undergrad Red Giant: The Death of a Star & Its Expansion
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Undergrad How Does the Gravitational Slingshot Effect Propel Objects?
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Undergrad Do Wormholes Exist in Our Universe or Just in Apples?
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Undergrad Gravitational Force: Why is Normal to Path of Satellites, Planets?
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Undergrad Earth's position relative to the Sun.
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Undergrad What Are the Individual Libration Percentages of the Moon?
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Undergrad Why are solar systems or galaxies flat?
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Undergrad Calculating star's radius and temperature.
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Undergrad Understanding the Principle of 'Skipping' Off the Atmosphere
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Undergrad Red shift and narrowband filters
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Undergrad Navigation through the Asteroid belt
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Undergrad Is there a perfect vacuum between atoms in space?
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Undergrad Question about atmospheric pressure
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Undergrad What Causes the Lines in the Spectrum of a Star?
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Undergrad Physics of Propulsion: Learn About Space Travel Tech
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Undergrad Line of sight and star density question.
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Undergrad Earth's Spin & Moon: Impact on Rotation
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Undergrad Type Ia Supernovae: Fusion Explosion Explained
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Undergrad Difference between theoretical astrophysics and theoretical physics
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Undergrad Where is Taurus in Relation to the Sun's Orbit in the Milky Way?
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Undergrad Understanding Quasars & Blazars: Definition & Theory
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Undergrad Shouldn’t ice on comets burn up quickly?
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Undergrad Trying to wrap my brain around gravitational assists
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Undergrad Is 0.026 the Key to Unveiling a New Exoplanet's Characteristics?
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Undergrad Calculating Orbital Velocity Ratios for Planets A and B
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Undergrad Small, rocky extrasolar planet discovered
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Undergrad Understanding Orbital Mechanics and the Concept of Sustained Circular Orbit
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Undergrad Does Light Take Longer to Reach Us Through a Gravitational Lens?
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Undergrad In which direction in the sky are we headed?
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Undergrad Extraterrestrial sky color based on atmospheric composition and sun color
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Undergrad What is the Angular Extent of Trigonometric Parallax?
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Undergrad E-Classifying Orbits: Learn How to Numerically Categorize Orbits
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Undergrad Calculating Acceleration Due to Gravity in a Galaxy
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Undergrad Planets Surviving Black Hole Formation: A Scientific Inquiry
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Undergrad Retrograde Motion: How Tilting of Moon Affects Revolution
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Undergrad Where can I find theoretical isochrones?
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Undergrad Evidence that the Universe is Expanding?
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Undergrad Find FWHM: Pixel Values, Gaussian Curve, Standard Deviation
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Undergrad How many pages of astrophysics textbooks can you absorb in a day?
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Undergrad Why does the Moon orbit the Earth rather than the Sun?
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Undergrad Can Black Holes Actually Emit Radiation?
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Undergrad When was Dark Matter Proposed After the Big Bang?
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Undergrad Why Aren't Concrete Spacers Required In Foundations?
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Undergrad How Does Gravity Affect Light in Black Holes?
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Undergrad How Did the Moon Achieve Orbit Without an Orbital Burn?
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Undergrad Right Ascension and Declination to the Horizon
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Undergrad Can I accurately plot the orbits of our solar system's planets using equations?
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Undergrad Was Kepler the First to Measure the Distances from Earth to All Known Planets?
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Undergrad Any transfer orbit better than Hohmann?
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Undergrad Could Trojan Asteroids Have Caused Earth's Collision with the Moon?
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Undergrad What is the potential of tethers for space exploration and satellite propulsion?
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Undergrad A Jupiter-mass companion to a solar-type star
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Undergrad Bad programming skills = biggest hurdle to astronomy research
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Undergrad Freshman project in astrophysics
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Undergrad Gravity and Planetary Orbits: Ellipses, Circles or Hyperbolas?
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Undergrad What is the Point of Equal Gravity Between the Sun and Earth Called?
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Undergrad Possibility of Betelgeuse exploding in near future
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Undergrad Could Alpha Centauri Host Habitable Planets Despite Their Short Stability?
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Undergrad Can somebody please explain Olbers' paradox to me?
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Undergrad Help with HEALPix: Get Advice and Tips for Synfast & Anafast
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Undergrad Converting Healpix file to traditional fits format
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Undergrad Kepler Discovers Small Exoplanet
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Undergrad Is there a 'simple' YORP calculation
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Undergrad Origin of the Moon: Did Luck Play a Role?
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Undergrad How do astronomers count stars in the Milky way? (procedure, method)
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Undergrad Is gravity an infinite source of energy?
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Undergrad Milky Way; How do we know it's a spiral?
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Undergrad The number of space debris objects beyond the geostationary orbit
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Undergrad How Can We Prove the Existence of Black Holes and Locate Them in Space?
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Undergrad Hanny's Voorwerp imaged by Hubble.
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Undergrad Why doesn't ice in Saturn's ring sublime away?
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Undergrad Early Universe: Closer Galaxies, Big Bang Visibility?
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Undergrad Where Does the Energy Go When Gravity Changes an Asteroid's Trajectory?
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Undergrad Could Europa's Subsurface Ocean Support Life?
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Undergrad How Do Gas Giants Retain Massive Atmospheres?
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Undergrad Earth-Moon System Without Sun: Effects Explored
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