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 Stars colliding/meeting up with each other
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Undergrad What is Space Physics and How Does it Relate to Cosmology and Astrophysics?
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Undergrad Earth changing tangental velocity?
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Undergrad How Would Changes in the Sun's Mass and Earth's Velocity Affect Earth's Orbit?
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Undergrad Would Earth's Rotation Change If the Moon Exploded?
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Undergrad Why are the emission lines in the Crab Nebula split into two?
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Undergrad Are There Habitable Planets Orbiting Alpha Centauri?
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Undergrad When will Andromeda galaxy look as big as the moon today?
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Undergrad The Dominant Source of Earth's Surface Heat: Solar Radiation or Interior Heat?
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Undergrad Lunar Phase Change with Reversed Moon Orbit
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Undergrad Why Hasn't the Kuiper Belt and Scattered Disc Coalesced into a Planet?
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Undergrad IAU Redefines the Solar System: 12 Planets, Countless Possibilities
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Undergrad Solar wind + Weak magnetic field = No water?
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Undergrad What Properties Can Be Extracted from the Hipparcos Catalogue?
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Undergrad ExoPlanet Hunting: Observing Stars with Celestron C11 XLT
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Undergrad Proving Venus's Orbit is 0.72x Earth's: Understanding Greatest Elongation
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Undergrad Can Gravity Create a Perpetual Motion System in Planetary Orbits?
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Undergrad Horizontal system of celestial coordinates
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Undergrad Gravitational pull is related to rotational speed?
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Undergrad What Is the Significance of Zero Right Ascension in Astronomy?
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Undergrad Measuring the absolute value of the AU
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Undergrad How Big Would A Planet Have To Be To Have Earth's Gravity?
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Undergrad Physical properties of objects that orbit each other in the universe
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Undergrad !Evidence of Star Formation in Molecular Clouds
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Undergrad Jupiter's Atmosphere: Questions & Answers
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Undergrad Sedna must be a planet (at least for now) according to new definition?
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Undergrad How close can planets safely exist from each other?
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Undergrad Calculating Limiting Magnitude for 12-Inch Telescope: Tips and Advice
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Undergrad Now Its Official: Eight Planets (Pluto got bumped)
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Undergrad Brightness of Mars as observed from earth
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Undergrad The moon moves in a near-circular orbit around earth
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  • Poll Poll
Undergrad What Defines a Planet?
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Undergrad Rehash: speed of falling object at Earth's centre
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Undergrad Doppler Effect and the Expanding Universe
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Undergrad Just a question of planetary magnetism
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Undergrad Phases of the Moon: Angular Separation Question
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Undergrad Final Year Project Ideas: Astronomy with a Celestron Telescope
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Undergrad How Does Weight and Thrust Affect Rocket Acceleration and Velocity?
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Undergrad Celestron 11" Schmidt Cassegrain: Choosing the Right Model
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Undergrad Unraveling the Mystery: X-Rays from Black Holes
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Undergrad How quasars are related to black holes in galaxies?
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Undergrad Why do Spectroscopic Binaries Have Short Periods?
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Undergrad Sudden ceasing of energy generation
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Undergrad Fusion of Stars: Time Difference for 0.50 & 1.5 Msolar Stars
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Undergrad Gravity on the surface of the Moon
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Undergrad If Mars had 25% more mass would its orbit be further or closer to the sun?
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Undergrad Does Juggling Follow Kepler's 2nd Law?
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Undergrad Age of the sun in galactic years
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Undergrad Anyone in san francisco willing to help?
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Undergrad Experiments that modeled blackholes
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Undergrad Is Dark Matter Invisible and Untouchable?
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Undergrad Translational motion of stars & planets
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Undergrad What If Earth Suddenly Reversed Its Rotation or Changed Its Axis?
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Undergrad Ocean Tides, Earth's Rotation, Moon's Orbital Radius, & Global Warming
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Undergrad Deriving Distance Modulus: m - M = 5log(d/10)
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Undergrad Calculating the gravitational accelleration on the surface of a planet
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Undergrad Why is my computer not moving away from me in an expanding universe?
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Undergrad Can a Planet's Gravitational Force Prevent a Comet or Asteroid Collision?
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Undergrad Mathematical discovery of planet neptune
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Undergrad What is the role of accretion discs in proving the existence of black holes?
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Undergrad Can Two Equal-Mass Planets Share a Satellite?
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Undergrad Does gravity explain all orbits in our solar system?
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Undergrad Possible Explanations To Fermi's Paradox?
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  • Poll Poll
Undergrad Is a Manned Mission to Mars Beneficial for Scientific Advancement?
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Undergrad Gravitational slingshotting
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Undergrad The Same Plane: Orbits & Galaxies in Our Solar System
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Undergrad Why does a star's gravitational force increase when it becomes a black hole?
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Undergrad Relation Between Areas of Astronomy
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Undergrad Drake equeation and planet finding
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Undergrad Someone want to have fun with asteroid simulation?
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Undergrad Is Our Sun Part of a Binary Star System?
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Undergrad Proving Pluto's Orbit Inside Neptune's - Maths Investigation
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Undergrad What distinguishes Pre-main-sequence stars from main sequence stars?
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Undergrad Distance between earth and moon increasing
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Undergrad Temp of a Comm Satellite in Orbit Around Earth
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Undergrad Why do stars exhibit red shift and blue shift in our universe?
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Undergrad How to Calculate a Parsec - Tips from Astronomers
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Undergrad Evolving Earth: Solar System Environment Over Time
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Undergrad Are White Holes Real or Just a Theoretical Concept?
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Undergrad Neutron star: heaviest teaspoon of matter
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Undergrad Interest in blackholes and whiteholes
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Undergrad Question about relation between galaxies
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Undergrad Likelyhood of Extraterrestrial Intelligence
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Undergrad Help finding an Aitoff projection of constellations
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Undergrad Orbit of almost 1 eccentricity
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Undergrad Galactic Plane Crossings and Mass Extinctions: Is There a Connection?
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Undergrad Are Images of Space Distorted by Gravity?
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Undergrad Is the Vacuum Between Water Molecules the Same as Cosmic Space?
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Undergrad Vernal Equinox: Understanding the Yearly Variation
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Undergrad Do Other Planets Have Radiation Belts Like Earth?
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Undergrad Characteristics of globular clusters
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Undergrad Life on Europa? Complex or Simple?
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Undergrad Do All Spiral Galaxies Rotate in the Same Direction from Earth's Perspective?
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Undergrad Galactic Frequencies: Info on Frequency of Galaxies
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Undergrad Why are Globular Clusters so Metal poor?
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Undergrad Galactic Merger: What Will Happen When Andromeda Collides with the Milky Way?
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Undergrad Light in Astronomy - Properties & Uses in Observing Objects
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Undergrad Solar celestial position (as function of latt, long, time of day, date, )
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Undergrad How to Calculate the Angle Between Two Celestial Objects?
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Undergrad What is a Plummer Sphere Exactly?
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