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 Confirmation on the Effect of Solar Irradiance
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Undergrad How can I know if two stars came from the same cluster?
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Undergrad Find Radial Velocity of Galaxies
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Undergrad Calculating Star and Planet Positions in the Night Sky: A Mathematical Approach
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Undergrad Is the expansion of the universe similar to an explosion?
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Undergrad Gravity moving toward the center of the Sun?
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Undergrad Redshift, Earth's orbital speed, and the speed of light
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Undergrad Using the Suns gravity for propulsion
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Undergrad Loss of mass of an object falling through air
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Undergrad Which laptop operating system do astronomers most often use?
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Undergrad Dark Matter is baryonic matter passed through a black hole?
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Undergrad Globular cluster luminosity function
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Undergrad Can Non-Destructive Methods Stop a Giant Asteroid from Hitting Earth?
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Undergrad What Happens if a Black Hole Dies or Disappears?
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Undergrad Re. Dark matter. Concept of nothing
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Undergrad Which is the most powerful black hole or a worm hole and why
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Undergrad Olbers' paradox and infinite number of stars
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Undergrad Origin of the Solar System: Understanding Hydrogen & Heavy Elements
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Undergrad Why Do Astronauts Feel Weightless on Their Journey to the Moon?
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Undergrad Why do geosynchronous satellites have to orbit above the Equator?
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Undergrad Absolute magnitude and luminosity
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Undergrad Why can't we reach to Speed of light at Space?
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Undergrad Difference in power and absolute magnitude of a star
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Undergrad Is the universe truly expanding?
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Undergrad Why is the speed of light 186,000 miles per second?
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Undergrad Difference between a red giant and red supergiant?
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Undergrad Was Space Present Before the Big Bang?
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Undergrad SDP.81 : how do we see the gavitational lens?
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Undergrad Time Theory in Astrophysics: How Is It Possible?
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Undergrad Question About Gravitational Time Dilation
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Undergrad Doubt About Hour Angle: How Can It Change So Little?
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Undergrad Why does the Sun behave like a black body?
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Undergrad Proof to Kepler's first and second laws
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Undergrad How wide is the observable horizon, at sea level?
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Undergrad What is the center of a globular clusters made of?
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Undergrad How Can We Reach Habitable Exoplanets?
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Undergrad Exoplanet Eccentricity vs Orbital Period
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Undergrad Saturn Day Shorter Than Expected | Ken Croswell | Science
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Undergrad Question about spectral lines of stars?
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Undergrad Why is the universe considered to be flat?
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Undergrad Multiple universes: Nothing more than philosophising?
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Undergrad Rare Plume on Mars: A Mystery Baffling Scientists
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Undergrad Calculating the distance between the clusters
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Undergrad Could we get to the moon using only classical mechanics?
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Undergrad Are there gaps between the rays coming from the sun?
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Undergrad Apparent Magnitude and Intensity Formula
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Undergrad Simulating the Solar System with N-Body Simulation in Java
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Undergrad Why are Earth-size Planets candidate as habitable planets?
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Undergrad Doubts about nebulae and star formation
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Undergrad What's the point of building a space elevator?
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Undergrad And now for the latest news from Alpha Centauri
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Undergrad Sending information in space: an invitation to catastrophe?
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Undergrad Horizontal Branch Star: A Planet-like Object Found on ALADIN
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Undergrad Earth and moon barycenter question.
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Undergrad Are Martian rock formations similar to those on Earth?
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Undergrad What is the mass of Jupiter's white oval storms compared to Earth?
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Undergrad Virtual Solar System (formula for gravity in 3d)
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Undergrad Seasons due to Earth's elliptical orbit
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Undergrad Question about solar energy: angle of incidence
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Undergrad Precession of Earth's axis and alignment with stars
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Undergrad How Do Supernovae Contribute to the Birth of New Stars?
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Undergrad Relationship between characteristic energy and delta-v
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Undergrad Need data for galactic rotation curves
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Undergrad Speed of Galaxies: Defying Physics?
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Undergrad Astronomy: Measuring Radio Wave Distance from Universe
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Undergrad "Amount" red light in red shifted light
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Undergrad Is Space Really Empty and What Does That Mean for Propulsion?
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Undergrad Calculate time (or fraction of orb. period) of sat. in umbra
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Undergrad Astrophysics Books by Frank Shu | Student Guide
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Undergrad Heat and Magnetism: How Does the Sun Maintain Its Magnetism?
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Undergrad Space Hazards on ISS: How Much Is at Risk?
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Undergrad What would Kessler Syndrome really look like?
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Undergrad Do Pulsars Really Produce Sounds or Are They Just Radio Wave Representations?
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Undergrad What is the definition of disc scalelength?
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Undergrad Diameter of Earth-like planet / gravitational force
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Undergrad How can you tell what kind of orbit a body will have?
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Undergrad What creates energy in a nova, supernova?
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Undergrad Image reduction and analysis software for windows
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Undergrad How do we accurately measure distances in space?
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Undergrad Trying to understand black holes
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Undergrad A question about Black Holes and their Gravity
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Undergrad Reading of planets billions of light years away
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Undergrad Converting/Creating Coordinate Systems for Other Planets?
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Undergrad Do tidal forces slowly make orbits more circular?
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Undergrad Discover the Spectacular Sky Color on a K4.5V Main Sequence Star"
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Undergrad Simulating Planetary Collisions: Outcomes & Results
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Undergrad Can i create a star from Jupiter?
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Undergrad Calculating Luminosity from Brightness: Where Did I Go Wrong?
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Undergrad Measuring the Movement of the Stars
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Undergrad How to Identify Polar Day and Night Seasons?
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Undergrad Question about Space -- Is Space itself a 4th dimensional object?
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Undergrad Sgr. A* - Mathematical calculations
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Undergrad How to Calculate the Distance Between Mars and Earth?
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Undergrad Did Biosphere 2 make any discoveries later used on manned spaceflight missions?
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Undergrad Power in Sun's Core: Comparing 10^26 W to 276 W/m^3
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Undergrad Why does the Soyuz cover its main engine?
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Undergrad Why doesn't ISS pass over the polar regions?
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Undergrad Uncertainty of planetary orbital period
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Undergrad How Much Declination Do Stars Need for a Luck City at Latitude 35°?
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Undergrad Would We See Solar Events Speed Up While Traveling to the Sun?
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