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 How to change CSpice initial velocity from an Asteroid SPK file?
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Undergrad Cosmological Positioning - How does one determine?
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Undergrad Is EK Draconis' binary status a factor in its ability to produce large CMEs?
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Undergrad How Big of an Object Orbiting Closer to the Sun Than Earth Could Be Overlooked?
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Undergrad Why is the Big Bang shown always directional, instead of globally?
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Undergrad What are the Coordinates of Sagittarius A* at Different Julian Century Dates?
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Undergrad History of astronomy and the Phases of Venus
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Undergrad Ultraluminous X-ray source in the galaxy NGC 55
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Undergrad A New Idea for the Origin of Earth's Water
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Undergrad Dark Matter as a condensation of photons in a space
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Undergrad Oumuamua: Solar System Acceleration & Origin Traceability
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Undergrad What is the average distance between objects in the Kuiper belt?
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Undergrad Reading Paper on Earth Occultation Technique
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Undergrad Is the Sun a low-mass star or a medium-mass star?
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Undergrad Questions about the Voyager spacecraft
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Undergrad How Does Earth's Rotation Vary Daily?
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Undergrad Relativistic Doppler Effect near a Black Hole
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Undergrad Image for increase in gravitational potential energy in radial field
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Undergrad How do gravitational waves differ from the expansion of the Universe?
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Undergrad Why do gravitational waves travel at the speed of light?
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Undergrad Bias and dark current from a graph of mean signal vs exposure time
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Undergrad Composition of Jupiter: Ices, Cores & Outer Gas Layers
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Undergrad The definition of volume inside black hole?
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Undergrad Stromgren photometric data in Vizier
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Undergrad Simulation debugging for Apollo Lunar Landing
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Undergrad Encircled energy for different aperture shapes (circle, triangle, square)
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Undergrad Issue with Stellarium: transit of Venus (find the parallax)
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Undergrad Confused about declination, elevation & altitude
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Undergrad Collision between the Milky Way and Andromeda and Redshift
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Undergrad About the relation between number of sidereal and solar days
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Undergrad Assumptions for blackbody spectra vs. emission spectra vs. absorption spectra
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Undergrad Newton's 3rd law and ether in space
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Undergrad Planetary Formation: Could Collisions Explain Our Solar System?
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Undergrad What Are These Mysterious Objects Spotted Near Orion?
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Undergrad Evidence for existence of a 9th Planet in the solar system
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Undergrad Is the existence of a Dyson Sphere impossible?
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Undergrad Dark matter + gravity is 'right', or our understanding of gravity is wrong?
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Undergrad Could Titan Be Our Next Home for Colonization?
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Undergrad Is Dark Matter Composed of Low-Mass Particles?
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Undergrad Orbital distance increase during the white dwarf phase of the Sun
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Undergrad Black holes and relation to creation
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Undergrad N-body simulation of high or low-mass dark matter particles
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Undergrad Dark Sky Parks -- coming to a park near you
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Undergrad (See image) At what distance does the temperature of the Corona decline?
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Undergrad Granules On The Sun: Photosphere Or Convection Zone?
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Undergrad Are orbital resonances constructive or destructive?
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Undergrad Magnetism and Gravity Discussion/Questions
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Undergrad Finding Exoplanets: How Astronomers Do It
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Undergrad Red-Shifting vs. Luminosity Question
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Undergrad Rotation curve with neutral hydrogen and dark matter
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Undergrad Why are emission spectra of stars rarely shown?
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Undergrad What is the average annual accumulation of cosmic dust on Earth?
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Undergrad If Jupiter had a 5th large moon until "recently", would we know?
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Undergrad Andromeda vs. Milky Way galaxies
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Undergrad What is theoretically the heaviest isotope that the R-process could produce?
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Undergrad Planetary orbits - the 2-body problem
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Undergrad FRBs (Fast Radio Bursts) -- New clues of their location and origin
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Undergrad Freshly Made Plutonium From Outer Space Found On Ocean Floor
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Undergrad How fast must Voyager travel to leave the solar system?
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Undergrad Are some cosmic rays iron nuclei?
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Undergrad What happens to the material not involved in the core collapse of a supernova?
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Undergrad Quantum Astronomy - well sort-of
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Undergrad How do I properly plot the solar spectrum and handle the flux of Arcturus?
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Undergrad Are all the celestial systems in the universe on a big plate?
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Undergrad Can Future Civilizations Use Dyson Spheres to Survive a Red Giant Sun?
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Undergrad Will stars on the other side of the galaxy affect gravity here?
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Undergrad Are Cosmic Rays Actually Neutrinos?
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Undergrad Coude Spectrograph vs Cassegrain?
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Undergrad Does the external field effect prove MOND over dark matter?
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Undergrad How does a brown dwarf's temperature decrease over time?
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Undergrad How can one see the noise in the Fourier Domain (Nyquist Frequency)?
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Undergrad How to find the distance from a star to the center of the Milky Way Galaxy?
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Undergrad Strange radio signal from Proxima Centauri
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Undergrad Is the Ecliptic Plane the Same as the Apparent Path of the Sun?
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Undergrad What is the astronomy reason for no UHF channel 37?
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Undergrad Solar chromosphere: inter-conversion of Ca I, Ca II, role of photons
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Undergrad What is a "temperature distribution" in a stellar photosphere?
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Undergrad Which forces maintain the shape of the Milky Way?
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Undergrad How do Limb-Darkening curves differ at two different wavelengths?
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Undergrad Why is Mars not considered a "full-fledged" planet?
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Undergrad Are there more Pulsars than we observe?
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Undergrad Will the Sun end as a Type 1a supernova?
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Undergrad Follow an object into a black hole
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Undergrad The stellar system genesis & supernova cycle
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Undergrad Dark Energy's Effect on Black Holes
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Undergrad Solve Fermi's Non-Paradox: Astronomers Weigh In
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Undergrad Hubble deep field & ancient galaxies
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Undergrad What is the rate of ejecta deposited between planets?
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Undergrad How big will the Betelgeuse supernova appear?
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Undergrad If Ouamuamua were a propelled lightsail, wouldn't we have detected it?
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Undergrad Solar System Diameter: Calculating Distances & Multi-Star Systems
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Undergrad Can Einstein-Chwolson rings be observed from a telescope on Earth?
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Undergrad Ignite Jupiter? Could Earthlike Planets Exist in Its Atmosphere?
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Undergrad Do stars in the ecliptic seasonally change brightness?
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Undergrad Was the Ancient Universe More Compact Between 12,000 BC and 400 BC?
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Undergrad Infrared energy flux from the Moon
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Undergrad How Does Space Travel Affect Natural Aging?
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Undergrad Transparency of a gas compared to a plasma
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Undergrad Gravitational lensing: deriving magnification of lensed image
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Undergrad How is Adaptive Optics Revolutionizing Our Understanding of the Galactic Center?
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