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 Why isn't the sun's rate-of-change in elevation constant?
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Undergrad Physical forces of a space collision
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Undergrad Sun's Layer Dynamics: Charting Individual Motions
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Undergrad Where does the galactic distance equation come from?
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Undergrad How large would a moon impact event have to be to affect the Earth?
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Undergrad Milky Way spins faster, has more mass than thought
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Undergrad What is the Electric Field Strength of the Sun?
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Undergrad Why Do Satellite Ground Tracks Oscillate in Latitude?
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Undergrad Inclination of Meteorids and Craters
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Undergrad Why Do Stars and Galaxies Keep Spinning?
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Undergrad How to calculate the position of stars
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Undergrad I'm confused about 1st Kepler's law and the 2 body problem
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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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Undergrad Why is the density of Mercury 40% larger than the density of Mars?
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Undergrad Charge of Black Holes: Mass Dependency Explained
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Undergrad Why are stars often found far from their birthplace in nebulas?
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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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Undergrad Does Empty Space Contain Mass and Energy?
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Undergrad Solar Wind and Its Impact on Planets
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Undergrad What are the benefits of using interferometry for exoplanet hunting?
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Undergrad What Prevents Air from Flowing Out of Earth's Atmosphere?
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Undergrad What Atmosphere Would a Metal Planet Have?
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Undergrad Are All Stars Struggling with the Coronal Heating Problem?
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Undergrad Is the Sun's Gravitational Effect Stronger at the Equator than at the Poles?
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Undergrad How does Earth sustain its Mag Field?
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Undergrad Gravitation vs Magnetic and Electric Field
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Undergrad What are some freeware options for fitting radial velocity data?
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Undergrad Why do the Sun's/star's luminosity increase during the main sequence?
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Undergrad Standard gravitational parameter
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Undergrad Why Is There a Hexagon Shaped Cloud on Saturn?
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Undergrad Space Based Power: Is it Practical? Safety Concerns & Benefits Explored
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Undergrad How much mass do you need to create Gravity?
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Undergrad Gravity verses electromagnetic attraction
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Undergrad Does Time Change at Different Depths Inside the Earth?
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Undergrad What are causing the Eccentricity of the planets?
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Undergrad Image Processing Software; suggestions?
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Undergrad Calculating L2 Lagrangian Point: A Beginner's Guide
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Undergrad Epsilon Eridani: 2 Asteroid Belts and an Icy Ring
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Undergrad Position of Planetary systems at given time
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Undergrad View from the Earth-Moon L5 point?
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Undergrad Will Sudan Experience a Predicted Minor Impact Tomorrow?
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Undergrad Throwing paper airplane towards space question
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Undergrad Why is the closing velocity of Andromeda and our galaxy so high?
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Undergrad The Secrets of the Universe: Measuring Age through Light Travel
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Undergrad Calculating the Earth's Elliptical Orbit around the Sun
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Undergrad Figuring out mass of a star based on diameter
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Undergrad Simple question about certainty/confidence in astronomy
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Undergrad Can Light Travel Forever in Space While Baryonic Matter Decreases?
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Undergrad Light travelling through a black whole
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Undergrad Apparent Magnitude of Binary Star System
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Undergrad No Green Stars: What's the Story?
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Undergrad Benchmark redshifts to tell your kid brother or sister
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Undergrad Question about the orbiting plane of the moon
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Undergrad Single Dish Radio Astronomy Inefficiencies
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Undergrad Can we reach Mars using thrusters and maintain a constant velocity?
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Undergrad HELP .The Azimuth and Altitude of Star Vega
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Undergrad Does Geological Evidence Support the Existence of Planet X?
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Undergrad Earth's magnetism and Sun's temperature
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Undergrad Hundreds of Rogue Black Holes in Our Galaxy - Is Earth at Risk?
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Undergrad How do we know how much visible matter exists?
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Undergrad Orbital question(elliptical vs circular orbit)
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Undergrad Evaluating the age of a universe
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Undergrad Can Relativity Explain the Possibility of Aliens Visiting Earth?
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Undergrad 3 questions on Physical Cosmology
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Undergrad Motion of randomly generated stars
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Undergrad Is Pi a Rational Number in Discrete Space?
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Undergrad Kepler's Laws, mysterious equation?
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Undergrad What type of camera is needed for solar corona photography?
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Undergrad Is it known what dark matter is?
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Undergrad Find the spectra of most elements on line?
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Undergrad Basic Question about angle of inclination of a circle
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Undergrad What Do Hard and Soft Spectrums Really Mean?
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Undergrad Basic question about sun's mass & orbit of planets
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Undergrad Moon's & Sun's Diameters During Solar Eclipse
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Undergrad Gravitation Force on the Earth's Centre
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Undergrad Why Don't Galaxy Rotations Follow Kepler's Third Law?
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Undergrad What Makes Our Solar System Special?
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Undergrad How constant are constants? - ice skating
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Undergrad Matter in space create red shift
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Undergrad Determining Sun-Earth Distance: Parallax vs. Kepler's Law
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Undergrad Why Does Blue Light Travel Faster Than Red in the Milky Way?
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Undergrad Photometry of SDSS Data: A How-To Guide
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Undergrad Gravitational equilibrium between earth and sun
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Undergrad Accelerometer xyz anlges to ra/dec
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Undergrad Can We Find Fossilized Remains on Mars?
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Undergrad Traversing the milky way galaxy when?
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Undergrad What is the relationship between velocity and distance in a stable orbit?
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Undergrad Will Uranus Ever Be Tidal-Locked to the Sun?
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Undergrad Question about Jupiter atmosphere
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Undergrad Earth-Moon Barycentre: Movement & Effects
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Undergrad At what altitude and velocity is an orbit geosynchronous?
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Undergrad Why Do Objects in Space Spiral Around Larger Masses?
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Undergrad Unanswered phenomenon in earth orbit
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Undergrad Is IK Pegasi (HR 8210) dangerous to us at all?
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Undergrad A Look at the Naming of Exoplanets
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Undergrad Absorb all sort of matter and radiations and still not releasing out?
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Undergrad Giant Asteroid Flattened Half of Mars, Studies Suggest
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Undergrad Perihelion Pass Dates for Planets - Alex's JS Orrery
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