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 What are the requirements for interstellar travel at different speeds?
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Undergrad Planet Hunters: First Two Planet Candidates Identified
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Undergrad How Does Mass Affect Stellar Luminosity and Simulations?
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Undergrad If center of galaxy is supermassive blackhole
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Undergrad Is gravity a weak force compared to other forces in the universe?
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Undergrad Help me to get the names of all stars with their declination?
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Undergrad What is the centroid of the earth-moon system and how is it calculated?
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Undergrad Solar vs Lunar Tides: Explaining the Difference
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Undergrad Earth's Gravity if the Earth rotated the opposite direction
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Undergrad Black Hole Gravity at a Distance
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Undergrad Would a Hot star have more mass than a cooler one?
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Undergrad Calculating energy from flux and max wavelength
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Undergrad Astronomy - Measure distance to other galaxies
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Undergrad Gravitational Effects: How Jupiter Impacts Mars' Orbit
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Undergrad New Results From LHC/ light speed project
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Undergrad How Do You Convert Pixel Number to Wavelength in a CCD Spectrum Analysis?
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Undergrad How to describe position of our solar system to some ETI in other galaxy?
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Undergrad Size of planet with 1/50 gravity of earth
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Undergrad Astronomy - Main sequence and red giants
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Undergrad What is the Area in Kepler's 2nd Law?
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Undergrad Detecting Cosmic Dust: The Challenges and Solutions
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Undergrad Orbits, ellipitical, circular, or ?
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Undergrad Will the earth and sun ever be tidally locked?
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Undergrad Example of a mass orbiting more massive, less luminous body?
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Undergrad Can a sun rise and set on the same horizon?
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Undergrad An impractical but difficult problem I stumbled upon
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Undergrad Mass of the core of the sun > mass of the sun?
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Undergrad The gravitational tug of the Sun and the Moon on Earth - a question
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Undergrad Earth's gravitational field size.
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Undergrad Earth Reaches Sun's Chromosphere: Timing Estimate
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Undergrad Spectroscopy: What Do He II & O III Lines Mean?
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Undergrad Super Novas Create Heavy Elements: Does this absorb or release energy?
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Undergrad How Do You Calculate Star Rise and Set Times for Different Declinations?
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Undergrad Collapsing Stars on the H-R diagram
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Undergrad How Can We See Light from Black Holes?
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Undergrad How Is Non-Thermal Radiation from the Sun Detected?
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Undergrad Spectrum of the Sun vs black body
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Undergrad 3D Model of the 2MASS Redshift Survey
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Undergrad How Does General Relativity Explain an Object Thrown Up Returning Back?
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Undergrad Why Do Stars Flicker? Not Planets
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Undergrad Can You Walk on a Brown Dwarf?
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Undergrad How many stars does one create and how many times can stars be
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Undergrad Tidally locked planet - shouldn't the Goldilocks zone be wider?
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Undergrad Infinity at the Center of the Galaxy
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Undergrad Did the Big Bang create the most massive black hole in the universe?
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Undergrad How would I go about creating a computer simulation for a Space Elevator?
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Undergrad What happened to stellar astrophysics?
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Undergrad Effect of Moon's Orbital Speed on Frequency of Solar Eclipses
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Undergrad From every angle, what is the complete shape of a black hole?
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Undergrad What elements are present in the sun and how do they form?
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Undergrad Can a Star Too Small to Go Supernova Still Go Supernova?
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Undergrad Silicon in Space: Robotics Applications Research
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Undergrad Hypothetical question: Meteor hitting Earth
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Undergrad How do I calculate a planets mass?
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Undergrad Visibility of a solar shade from a planetary surface
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Undergrad Speed of light vs. the universe's inflation
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Undergrad Comparing Angular Rates of Star Rotation at Different Latitudes and Longitudes
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Undergrad What is the Iron Mass in the Main Asteroid Belt?
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Undergrad Calculating Orbit Parameters Given Perigee Velocity and Period
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Undergrad Gravity Decrease in Discs: Rate Explained
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Undergrad Project Help - Distribution of AGN in a particular cluster
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Undergrad Star density calculation = weird result.
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Undergrad Understanding the Changing Density of the Sun's Core
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Undergrad What Innovative Astrophysics Project Ideas Can Reflect a Student's Creativity?
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Undergrad How do nuclear powered space craft generate thrust?
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Undergrad Speculations and hypotheses about Theia
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Undergrad Waterworlds: A Rarity Among Terrestrial Planets?
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Undergrad Why would we ever terraform if we can develop cyborgs?
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Undergrad Are Sedimentary Layers the Cause of Banding on Asteroid Vesta?
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Undergrad Light in intergalctic space/ voids
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Undergrad How much force is needed to move a planet.
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Undergrad What Are the Latest Discoveries About Pluto's Moons?
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Undergrad Kronberger 61 and Planetary Nebulae
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Undergrad Is It Possible to Explore the Entire Universe?
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Undergrad Is weightlessness in orbit just a result of horizontal velocity?
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Undergrad How to Get Intense Light Star for Spectrum Analysis
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Undergrad Stefan-boltzmann solved for temperature?
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Undergrad Illuminated fraction of the Moon
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Undergrad Calculating Sun's Speed and Movement: A Query on Theories of Light
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Undergrad ET phone home or anywhere really
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Undergrad Is Motion Relative?: A Look at Helio/Geo Centric Fundamentals
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Undergrad Speed of light is it really constant?
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Undergrad Difference between a Gravity Well and a Black Hole
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Undergrad Why Are U-B and B-V Values Important in Studying Stars and Clusters?
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Undergrad Could gravity affect human evolution?
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Undergrad Is Nemesis a Real Companion Star to Our Sun?
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Undergrad Calculating Gravitational Energy
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Undergrad Black Holes Schwarzschild radius
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Undergrad Dark energy - Expansion of the universe
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Undergrad Physics Simulation: Calculating Gravitational Force between Earth and Sun
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Undergrad Where Can I Find Accurate Data for Simulating Solar System Orbits in Java?
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Undergrad The star Betelgeuse going supernova soon?
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Undergrad What Determines the Size and Growth of a Black Hole?
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Undergrad Objects in orbit are weightless?
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Undergrad Is Iron the Ultimate Killer of Stars?
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Undergrad NASA Space Shuttle Launches iPhone to Test Radiation Effects
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Undergrad Researching to Become a Theoretical Astrophysicist
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Undergrad What is the ratio of hydrogen to helium in the Sun?
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Undergrad Could a Swallowed Moon Explain Uranus's Tilt and Magnetic Field?
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Undergrad Why does the permeability of free space invoke pi?
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