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.
A In the power spectrum, why is the peak frequency at the first harmonic
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I Help With Simple Orbital Modeling
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I Can S5-HVS1 Retain Its Planets?
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B Water found on potentially habitable exoplanet
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Stargazing Witness the Transit of Mercury: Nov 11, 2019
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B Will Big Stars Turn Into Red Supergiants or Red Giants?
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B If I were to observe a black hole....
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I Angular Momentum in a Solar Nebula
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B Are There Any Kardeshev 2.0 Civilizations in the Milky Way?
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B How well do we know solar activity?
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B Milky Way is "in the top percentile of all the galaxies that exist"
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B Structure and Dynamics of Blue Supergiants
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I What is the new source of space radiation discovered near Earth?
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I Where does gravity switch from stronger to weaker, if it does?
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A What Does Space Gives Moving Orders Mean for Gravity in Einstein's Universe?
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B What Are the Force and Speed of Pulsar Winds?
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I Interpreting a scale factor vs. distance graph
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I Separating Masses in Kepler's Third Law
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B The search for habitable exoplanets in Alpha Centauri
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I Confusion over what exactly constitutes the ecliptic
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I Mass-luminosity relationship for red giants and AGB stars?
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A Are Retrograde Satellites the Key to Stable and Optimal Orbits?
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I Question about Galactic Rotation curves in the Milky Way galaxy
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I Calculating Speed and Acceleration of a Gas Blob Orbiting a Massive Black Hole
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I Would a rover on an asteroid float away because of the low gravity?
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I How is asteroid 101955 Bennu possible?
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Friday's Historic All-Woman Spacewalk
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B Creating an Interstellar Dust Nebula Experiment: Tips and Tricks for Success
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I What happens to gravitational waves?
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A Effects of gravity throughout space-time?
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B Why does the Andromeda galaxy appear so tiny from our perspective?
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I Heating/cooling moon tunnels, why and how?
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B Anyone here in the CA blackout area that has enjoyed dark skies?
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I Matter-Antimatter black hole collision
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I Are the red dots in the Whirlpool Galaxy individual red supergiants?
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B Nobel Prize for first exoplanet discovery
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B Atoms, Black Holes: Solving 2 Problems with 1 Theory?
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B Angular Meteorite Strikes on the Moons Surface
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B What Happens to a Dead Galaxy's Mass?
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I How Does Kirchoff's Law Relate to Spectrum Intensity and Wavelength?
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B Are Electrons & Protons Oriented in Stars Like Other Objects?
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I Is Planet 9 Actually a Primordial Black Hole?
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I How can Kepler's laws be visualized using a simulator?
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NASA's Black Hole Visualization/Explanation
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B Is there more to the Red Shift than we think?
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A What's the Difference Between Gravitational Waves and Gravity Waves?
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B Superclusters and their galaxies
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Possible to build a space tower?
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Stargazing Who Tracks and Warns Us About Asteroids?
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Anyone else thought the Moon last night was cool?
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I Is J0740+6620 an eclipsing system?
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Stargazing What explains the Luna impact gap?
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I Electricity & Planetary Magnetic Field Reversal: Implications & Studies
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I Could a Star Avoid a Supernova and Form a Black Hole?
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I Challenges to the Redshift Method and Hubble's Law
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B How does the LIGO experiment affect SpaceTime?
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I Large Bipolar radio bubbles in the Galactic Centre
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B A wormhole collides with a black hole -- what would happen?
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B Do we have another interstellar visitor?
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B Can We See Our Past? - Milky Way & Hubble Telescope
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I Question about stellar nucleosynthesis from a non-expert
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Venera 13 photos from the surface of Venus
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Stargazing What is the brightest red dwarf star seen from the Earth?
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B What would it be like on Earth if it were not a sphere?
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B Radiation shielding and redirecting
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B The Mysterious Shape of Jupiter: Why Gas Planets Stay Spherical
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B Intensity of Spherical Shell of Stars
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B What are the maximum masses of White Dwarves and of Neutron stars?
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I Were paths of Voyager craft lucky to get out of the heliosphere?
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A Future of the electron neutrino mass limits
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I Europa Clipper Interplanetary Mission
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I Relationship between collision and relaxation
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Gas around the black hole of galaxy M87
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I Distance using Cepheid variables
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If you could see gravity what do you think it would it look like?
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I Is there a radial gradient of redshifts within individual galaxies?
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I Why are planets visible in a telescope in the daylight?
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A The Habitable Exoplanet Hunting Project
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I Deflect Asteroid w/ Collisions: Calculating Theta & MJ Interractions
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B How to calculate a star's luminosity/radius
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I The Symmetry of Angular Momentum Conservation
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Stargazing Two White Dwarfs in a seven minute mutual orbit
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B Resources to help understand black holes
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B Is the Instantaneous Expansion of Space-Time Possible?
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I Did Planet 9 and Neptune Cause Uranus' Tilt?
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B Is the Milky Way Warped? New 3D Map Reveals Surprising Findings
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I What is Earth's future warming due to the Sun's increasing luminosity?
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I On Hubble's constant, the expansion of the Universe and vacuum energy
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I How much worse is the location of La Palma vs. Mauna Kea?
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Stargazing Mysterious Phenomenon Seen in the Night Sky
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A Resolving power of a radio telescope array: Quantum or classical?
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Stargazing Two moons, two different rotational paths around a planet?
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I What is the Maximal Parallel Velocity of a Satellite in an Elliptical Orbit?
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I Free Orbit Insertion: Is it Possible?
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I Are dark matter and dark energy caused by same phenomenon?
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I E- & Ions Deflection by Earth's Magnetic Field
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Stargazing CApollo 11 50th Anniversary: CSPAN3 Coverage Today
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B What would happen if the core of the sun were removed?
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I Earth’s Magnetic field formula or downloadable vector field
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A Probability distribution: exponential of a quartic
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