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.
B Gold Synthesis in Supernovae: What Form Does It Take and Under What Conditions?
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I How Big is a Planet with a 5000mph Rotation and a 52-Hour Day?
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B When Did the First Stars in the Universe Form?
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B What kind of supernova do binary neutron stars produce?
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B Why Do Stars Show Both Emission and Absorption Spectra?
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I Calculating distance, object speed, etc - RE:Falcon9
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I If radiowaves are reflected from objects (i.e planets)....
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I Is an integral over phase space reasonable?
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B View Zodiacal Light Before Morning Twilight - Prime Season Now!
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B Solar Energy at Mars: How Much Can Be Produced?
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B Can we know what exists in planets' subsurfaces?
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Stargazing The Pleiades: an underrated glory of the night sky
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B Could dark matter be regular matter?
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I Hawking Radiation: Explaining the Evaporation Effect
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Stargazing How Does Hubble's Field of View Compare to Amateur Telescopes?
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Stargazing Kepler Telescope Views Single Point in Space 4.2ly Away
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I Are Cosmic Rays Intensifying Across the Globe?
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I Why does hawking radiation in black holes slowly increase?
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I Moon revolution period 27.32, but got 27.53 from equation?
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I If the observable universe was visible to the naked eye....
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I Density of matter in the expanding Universe
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I "Moment of Inertia" in Virial Theorem
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B What does a black hole look like from the inside?
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A Change in average atomic mass in universe through time?
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I What Makes Black Holes Black and White Holes White?
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I Where is the dead star that created us?
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B Albedo, atmosphere, and predicted temperature of Venus
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A 1st and 2nd moments of H(mu) function
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B Is fusion in an accretion disk of a black hole possible?
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B Do Atoms in Neutron Stars Touch Each Other?
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B Are colors in astro photos 'real'?
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I Why do Great Oppositions of Mars Always Happen at the Same Time of Year?
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I How can inhabitants of moon guess of its revolution
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B Why Were Planets Visible to Ancient People but Not Us?
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B Why does the Great Red Spot spin counter-clockwise?
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B Can the space to have new properties without researching?
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A What Are the Next Greatest Effects on the Moon's Motion?
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A What happens to the red dwarf during a classical nova?
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B Before Big Bang: Can We See What's Beyond?
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I Infinity vs Expansion: Is an Infinite Universe Compatible with Expansion?
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Charge balance in observable universe
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Synthetic Black Hole Event Horizon Created in UK Laboratory
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Stargazing Will You Be Watching the Perseid Meteor Shower?
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I The declination at the horizon in the east at a latitude
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A What are the most common programming languages in astro?
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I How is it possible for a ring singularity?
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B Understanding the Perseid's Motion in Relation to the Sun
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I Is Redshift Always Proportional to Velocity?
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B What Makes the Sun's Gravity Well So Deep Compared to Earth's?
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I Could Chemistry Occur in Titan's Hydrocarbon Lakes?
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Stargazing What telescope is best for a beginner on a budget?
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B Is the Milky Way unique or do other galaxies have these voids in their centers?
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I Is the boundary of a star objective or subjective?
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Astronomers make first accurate measurement of oxygen in distant galaxy
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B Is the Andromeda Galaxy Green Shifted and How is Red Shift Measured in Practice?
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Stargazing Telescope Design: Calculating Total Distance from Primary Mirror to Eyepiece
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Venus to be humanity's next destination?
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B Gravitational Orbit: How Size Determines Distance & Speed
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B The Milky Way's Dark Twin Revealed
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Stargazing What should I observe in Southern Skies during my trip to South Africa?
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B What Would the Moon's Apparent Magnitude Be 1000 Times Closer?
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I Does Mass Bend Time?
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B Vectors & Gradients: Confused? Get Answers Now!
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I Is Jupiter too big to orbit the Sun?
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I Quasar Brightness: A Case of Light-Days or Light-Years?
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I Rotation curves of galaxies as a function of isolation.
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I First atmospheric spectroscopy of Earth-sized exoplanets
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Stargazing Radio Telescope Building Guide for Beginners
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I Explore the Immense Universe with the Incredible 3D Map | CS Monitor
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B Where Can I Find Math for Black Hole Firewalls?
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I Who really found out the Universe's acceleration?
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I Which light do we use to measure flux?
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I Scale factor/redshift formula wrong at the end?
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B Could a research base on Mercury be the key to unlocking solar mysteries?
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I Energy Released in Stellar Nucleosynthesis
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I State of the Universe if we increase/decrease the binding energy of deuterium
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Stargazing Which Telescope Should I Buy for City and Country Use?
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Stargazing What is the true extent of the semi-major axis for companion stars?
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Escape Velocity: Unraveling the Mysteries of Kinetic & Potential Energy
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I Why was the early universe opaque?
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Stargazing Telescope or Binoculars for First Astronomy Device?
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Stargazing Don't Crush that Dwarf Planet, Hand me the Pliers
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B Where is the CG between the Earth and the Moon
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Stargazing Stars in sky given arbitrarily sized/oriented window
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A Is there a polarisation of the microwave background
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Stargazing Is it worth getting a telescope?
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I Why do nebulae tend to collapse into discs?
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B In Cosmic First, Scientists Spy a Star's Snow Line
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Stargazing Artificial Stars for testing telescopes: the final answer?
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Stargazing Is cheap CCD worth the cost for astrophotography?
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I Solar physics: coronal holes & sunspot cycles
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A Could Earth Support Two Moons in Different Orbits?
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B Outer Solar System Origins Survey, Dwarf Planets and TNOs
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Stopping or re-routing comet 67p
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I How Can We Measure Redshift Using the Spectrum of a Star?
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I How can we measure a galaxy's velocity via a star?
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I Determine the temperature of a star via its spectrum
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B Pale Red Dot Mission: Launching Probes to Alpha Centauri in 2030s
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B Influx vs. radius equation, mistake in the dimensions?
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I Why do we calculate the density of states using k-space?
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