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 Most-detailed-ever simulations of a BH solve long standing mystery
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Undergrad The Sun's excess gamma rays and strange dips
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Undergrad Please teach me about the mass of Sgr A*
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Undergrad Terraforming Mars by using Europa
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Undergrad What physical mechanisms are involved in heating planetary bodies?
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Undergrad Questions about the inverse square law
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Undergrad Mars Magnetosphere: New Research on Solar Wind Induced Shielding
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Undergrad How best to photograph the Lyrid meteor shower
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Undergrad Is the Floating Launch Loop a Viable Alternative for Space Exploration?
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Undergrad Planets or stars that are composed entirely out from Dark Matter.
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Undergrad Cosmic microwave background observations
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Undergrad What happens to spacetime during the expansion of the Universe?
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Undergrad So astronomers really don't have an idea about density of asteroids?
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Undergrad Some comments on the 2019 Planetary Defense Conference
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Undergrad Fitting a SiII curve in a supernova spectra
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Undergrad For astronomers, what software/languages do you use to handle data?
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Undergrad What is the Most Accurate Mass for Rigel?
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Undergrad Discovering Sedna: The Mysterious Red Planetoid Orbiting the Sun
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Undergrad Why are pictures of galaxies so clear?
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Undergrad Typical light levels at Mars's surface
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Undergrad Could a fully convective Sun double its lifespan?
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Undergrad Why the Moon always shows the same face
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Undergrad Disappearing lakes on Titan - seasonal cycles
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Undergrad Uncertainty Over Sextans Galaxies' Group Membership
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Undergrad Are Galaxies Gravitationally Bound?
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Undergrad Does a solar eclipse gamma of 0 mean eclipse goes through 90° altitude?
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Undergrad Exploring the Gravitational Pull of Black Holes: A Perspective on Safe Distances
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Undergrad M87 Black Hole Photos and the Spin Orientations
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Undergrad Orbital velocity of a craft at 4km above the Moon's surface
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Undergrad Observation of the Messier 87 Super Massive Black Hole
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Undergrad Could the kinetic energy of space junk be recycled?
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Undergrad New LIGO/Virgo event (08-Apr-19)
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Undergrad Probability distribution of angle of asteroid entry to the atmosphere
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Undergrad What is the minimum mass of a neutron star?
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Undergrad Is Late Water Flow on Mars Linked to Climate Change or Permafrost Melting?
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Undergrad Would a HEMP event cause the northern lights?
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Undergrad Understanding Negative Inclination Orbits in Space Science
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Undergrad Northern lights and the magnetic field
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Undergrad Can the MOND theory be experimentally tested?
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Undergrad Main Sequence Rules: Definition & Interpretation
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Undergrad The use of 3D reconstruction techniques to build a galaxy model
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Undergrad Will There Be a Solar System Navigation System for Space Travel?
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Undergrad Isn't planetary rock dating really supernova dating?
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Undergrad Is Bad Astronomy Using Bad Statistics?
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Undergrad Debunking the Moon Landing Conspiracy Theories: Evidence and Explanations
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Undergrad A very small object following Earth in the same orbit
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Undergrad Would we know if the Milky Way were a quasar?
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Undergrad How Do We Determine the Sun's Generation?
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Undergrad Is Tabby's Star Dimming Due to an Alien Megastructure?
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Undergrad How is Dark Matter distributed around our galaxy?
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Undergrad Confusion about absorption spectra - cool gases absorb?
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Undergrad What is the pressure gradient towards the centre of a large planet?
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Undergrad Humanity: Master fusion reactors or build a dyson sphere?
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Undergrad Too Much Dark Matter In CEG Mrk 1216
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Undergrad How would the DSG orbit the Moon?
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Undergrad Two gravitational events might be a single lensed one
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Undergrad Space docking using the Meissner effect
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Undergrad Expanding universe or tired light in a static universe?
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Undergrad How Does the Sun's Position Affect the Earth-Moon Barycenter?
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Undergrad Galaxy at z=11.1, farthest yet, unusually bright (GN-z11)
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Undergrad Why Do Stars and Hot Metal Show Different Colors at Similar Temperatures?
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Undergrad Does all orbiting space debris eventually fall and why?
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Undergrad Understanding the Impact of Solar Radiation and Eccentricity on Earth's Climate
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Undergrad Why Are Star Spectra Shown as Absorption Rather Than Emission?
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Undergrad Why hasn't the Oort cloud converged to a disk shape?
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Undergrad Opal Crystals on Mars: Implications for Geochemical Conditions
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Undergrad Supermassive black hole eating a stellar black hole
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Undergrad Would it be possible to observe an alien city?
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Undergrad How to find the position of a celestial object in the sky?
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Undergrad What is the mass of all photons emitted in the universe?
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Undergrad What does this description mean? (two bodies orbiting each other)
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Undergrad Solar Images Data: Where to Find?
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Undergrad Life on Neptune: Could Its Ocean Support Complex Life?
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Undergrad Calculating STEVE's Height from Two Photos 370km Apart
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Undergrad Moon's eccentricity, apogee and perigee
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Undergrad Formation of super-massive black holes
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Undergrad Is inflation needed to explain uniformity?
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Undergrad Gaia Space Telescope and Lagrangian Point 2
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Undergrad Sunlight refraction at sunset at different latitudes?
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Undergrad Why there is no disturbance in orbital paths?
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Undergrad Why Does the Sun Have an Orbital Period Like a Year?
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Undergrad Repurposing Satellites: Maximizing the Lifespan of Space Technology
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Undergrad Why do we need to unify gravity with the other three forces?
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Undergrad Collision of Milky Way and Andromeda....?
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Undergrad Calculating Velocity of a Ball in a Black Hole's Sphere of Influence
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Undergrad Do trojan satellites follow migrating planets?
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Undergrad Why do transits of Mercury only occur in May & November?
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Undergrad Black holes with a naked singularity?
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Undergrad If a planet struck the sun, would fragments be blasted out?
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Undergrad Why isn't Mercury as red as Mars, even though it has more iron?
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Undergrad Would an exploded planet change earths orbit (see graphic)
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Undergrad What factors determine the composition of a planet's atmosphere?
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Undergrad Compute the total stellar mass from a galaxy with Red Giants
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Undergrad Colliding black holes: when will linear acceleration end?
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Undergrad Restricted three body problem (numerical simulation of gravitational attraction)
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Undergrad Gravitational field in the galaxy and Schwarzschild´s time dilation
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Undergrad Redshift Along Galactic Plane: Study & Research
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Undergrad A steady-state solution for the flow in the Boussineq approximation in a star
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Undergrad A question about a popular example of expansion
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Undergrad Rotation profile for radiative zone of Sun - convection
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