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.
I Potential biosignature found in Mars rock
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I Could fast radio bursts be alien radar signals?
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I How to explain the strange pulsar in the Crab Nebula?
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I Why are continuously emitting radio pulsars not detected?
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I Time interval terminology
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I Big bang balloon?
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I Sun gravitational lensing forces
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I Large Synoptic Survey Telescope -> Vera C. Rubin Observatory
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I Questions on Expansion of the Universe and Newtonian Physics
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I How 'Messy' are Fusion Reaction Chains in Stars?
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I Help with my Polar Aligning Star Tracker please
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I IRAF 2025?
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I If We Crack the Neutron Star Equation of State, How Will It Change Our Daily Lives?
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I Gravitational wave effects on different materials
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I Mass Loss on an HR diagram
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I Magnitude where the Pale Dot is blue?
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I Galaxy GNZ11 33 billion light-years away
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I Why Do Nebulae only have Hydrogen, Oxygen and Sulfur?
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I Confused about Stonyhurst Grid and jHelioViewer
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I How can the Universe be infinite?
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I Speediest Exoplanet System
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I Fastest space travel
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I The initial density of an object and its compression into a black hole
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I Would discovery of a galaxy without dark matter disprove MOND?
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I Cosmic ray origins
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I How big a lunar radio telescope to detect Earth-like signals?
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I Nature paper on Moon's initial evolution - Tidally driven remelting
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I The Heavier Elements: A Question About Their Abundance
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I Moon phase ruins my Stargazing!
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I Expansion of a star to become a red giant
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I How to graph Earth's path?
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I Possibility of multiple planets sharing the same orbit?
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I Is this the correct representation for showing the direction of a star on CMD?
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I Does light bend around black holes?
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I New Developments In The Search For Planet X
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I How feasible is home radio astronomy?
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I Right ascension and Declination calculations
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I The brightness and linear polarization of pulsars
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I Rotation curve of a gas disk in an elliptical galaxy
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I J0524-0336, surprisingly high Li concentration
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I Can there be free electrons in interstellar gas?
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I Regarding the accuracy of the description of a pulsar in a 1977 paper
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I Wow! signal could be from interstellar hydrogen clouds
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I Comet A117uUD Goes Interstellar after Encountering Saturn in 2022
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I What Factors Create the Windiest Exoplanets?
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I Any Galaxy (Milky-way) based coordinate systems?
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I Galaxy collision separates dark matter from regular matter
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I Shell structure topological defects as substitute for dark matter
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I Very bright geo satellite in my night sky?
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I What is the Possibility of Habitable Planets Around Brown Dwarfs?
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I Early Universe massive Black Holes question
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I Galaxies as systems extended from the solar system
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I Unknown Radio Signal from Space Repeats Every Hour -- Usually
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I Is the Universe Truly Infinite?
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I Retro/prograde flyby galaxies and their bar formation
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I Vera Rubin's research
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I Observational Astronomy Project Ideas to Show Special Relativity
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I Deriving the Roche limit(d) for body of mass M and satellite m
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I Questions about Black Holes, Hawking Radiation, and Dark Matter
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I Can time on elliptical orbit be expressed analytically?
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I Light curving around vortex simulating a black hole
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I Determining stellar mass independent of its gravity
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I Why on Earth do we not see older stars close to us?
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I Need help simplifying standard error formula for redshift
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I Orientation of the Earth, Sun and Solar System in the Milky Way
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I The linear polarization and brightness of pulsars
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I Where Are the Missing Black Holes in the Milky Way?
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I How fast were distant galaxies moving?
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I Speed of the umbra during eclipse vs rate of the Earth's rotation
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I Increase frequency of solar eclipses
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I Can there be slowly-falling accretion disks in black holes?
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I Solar anomaly and the Antikythera Mechanism
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I Atmospheric escape parametre statistics
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I Stellar evolution path and Regression line
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I How Does the Size of Neutron Stars Compare to Black Holes?
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I How Can Measured Satellite Magnitudes Be Converted to Radiant Intensity?
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I Is the Sun's photosphere fluorescent?
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I What are the Dynamics and Impacts of a Type II Supernova?
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I Why Does Spectral Line Darkening Occur Despite Photon Re-Emission?
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I Adding more meteorites to my collection
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I Separation angle between pulsars detecting Gravitational Waves
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I Why Does Gravity Remain when Star Mass Dissipates?
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I Plotting the orbits of the planets from Ephemeris data
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I Help identifying this Tumbling object in a night sky photo from Namibia
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I Why Do Stars in Binary Systems Assume a Teardrop Shape?
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I Can Hawking Radiation Exist If Nothing Escapes a Black Hole?
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I Could the Universe Be Much Older Than 13.8 Billion Years?
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I How Does Inverse Bremsstralung Affect Photon Absorption?
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I Einstein ring and Einstein Cross
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I How Do Moons Influence the James Webb Telescope's Position at Lagrange Point L2?
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I What is “absolute circular polarization fraction” for a pulsar?
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I Why Does NASA Claim 10-100x Better Bandwidth from Optical Communications?
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I What does the output of a radio telescope look like?
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I Is Dark Matter the Key to Understanding the Pre-Visible Universe?
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I Can You Build Your Own Radio Telescope at Home?
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I Telling time on Iapetus and other general questions about Iapetus
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I An asteroid the size of the Rose Bowl has a slight chance of impacting Earth?
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I Solar Calendar -- When was the leap day inserted?
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I How Can We Measure Properties of Distant Planets and Stars?
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I Nuclear reactions in the Sun and other topics on stars
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Astronomy

Astronomy is the scientific study of celestial objects and phenomena beyond Earth's atmosphere. It encompasses the observation and analysis of stars, planets, galaxies, and other celestial bodies, as well as the broader exploration of the universe's origins, structure, and evolution.

Astronomers employ a variety of tools, including telescopes, satellites, and advanced instrumentation, to gather data and uncover the mysteries of the cosmos. The field addresses questions about the nature of dark matter, the expansion of the universe, and the potential for extraterrestrial life.

Astronomy not only contributes to our understanding of the cosmos but also inspires wonder and curiosity about the vastness and complexity of the universe we inhabit.

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