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 Is Jupiter Responsible for the Majority of the Solar System's Angular Momentum?
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B How do scientists measure mass, radius, and distance in astronomy?
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B Traveling to Mars and time dilation
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I Colonies on Mars -- fundamental problem
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I Origin of the Moon: Latest Discoveries and Theories
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A Difference between eclipsing binaries and exoplanets
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B How Does the Midnight Sun Occur in the Arctic Region?
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I Dark matter and old shell theorem
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I Data Model of Kepler's Second Law of Planetary Motion
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Stargazing Does a Radio Telescope Have Aberration and How Does it Affect Its Performance?
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I The Trouble with TESS: Examining its Limitations in Exoplanet Observations
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A Neutron star collisions as a heavy element source
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Can two planets share the same orbit without catastrophic consequences?
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I Can black dwarfs exist in the present Universe
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B Can Friction Create Preferentially Circular Orbits?
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I How does the distribution of elements change over time?
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I Will white dwarfs cool down to blue, then yellow, then red?
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I How Does the GAIA Program Count 1.7 Billion Stars in Its Image?
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B Is an External Force Driving the Acceleration of Universe Expansion?
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I N-body Simulations: Density vs Circular Profiles
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A This is the most active place in the universe
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A Using the Sloan Digital Sky Survey to Extract Quasar Spectra and Fit Models
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Massive Football Field-Sized Asteroid Comes Close to Earth
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B Number of stars in the universe over time
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Stargazing Movement of Stars seen from the North Pole
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I Why Is Convection Efficient in the Outer Layers of Stars?
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I Calculating the incidence angle of the Sun
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I Stellar Thermal Energy with no Nuclear source
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B Orbit circularisation/insertion spreadsheet
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B Is the Asteroid Belt's Shape Misrepresented?
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I Source of the weather on Neptune
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B What is the Earth's path in relation to the sun and the expanding universe?
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I Origin of the half factor in Euler-Lagrange for geodesics
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I Dark Matter and who will discover it first?
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I How to describe the Sun's interior?
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B Is the Milky Way the same as 'The Galaxy'?
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B Basic rule for Atmospheric Reentry of Glider Class vehicles
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B Density of matter at a galactic center
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I Expanding math space implies expanding space?
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B Using Venus in the Parker Solar Probe mission
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I Milky way arms and the position of the Earth
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A Where can I find a text about heavy elements migration?
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Super Blue Blood Moon: Did Anyone See It?
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I The Explanation for the Mass-Luminosity Relation
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I Relationship between star radius and luminosity
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I Questions About Acceleration and Jerk in Orbits
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I The Role of magnetic field during the formation of small to medium scale stars
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I How do we measure the velocity of stars in a galaxy?
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B North and South poles of Mars are at different temperatures?
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I Standard Solar Model: Learn About Its Complexity
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I Diameter of a Galaxy: Calculate Distance/Arc Min?
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B HiRISE images show strange-looking Mars formations
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B Why does the flag on the moon appear to be waving during the Apollo 13 mission?
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I Star formation and heavy elements
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B Chinese not sure where space station will land
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B Survival on Mars: Radiation & Temperature Challenges
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A KIC 8462852 (dipping again in March 2018)
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A What could potentially explain the onset of the Pioneer Anomaly?
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B Interplanetary travel, Arctic sea ice
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I What is the net charge on the Earth?
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B Extracting Spectra from Sloan Digital Sky Survey Data Releases 13 and 14
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Why Are Space and Time Considered the Three Dimensions of Our Universe?
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I Minimizing diffraction in images using a photodetector
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B Sholz's star entered the Oort cloud ~70kya
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I Why is the density of photons in the Eddington Limit derived this way?
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I What is the recession speed of a galaxy based on the wavelengths of two stars?
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B Physicist who Questioned Black Holes
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I Qs re aspects of the Holmdel Horn Antenna used to find the CMB
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B Third Cosmic Velocity: Will Voyagers Leave Solar System?
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B What Is The Energy of a Point In Space?
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B Does a partial solar eclipse never completely rise?
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I Can Tidal Locking Occur in Binary Neutron Stars Before Merger?
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B Remembering the Legacy of Stephen Hawking on Pi Day - BBC News
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B Life Outside Our Planet Without Oxygen and Water
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I [Question] Tell me the latest catching news about black holes
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I Would you see stars on the early Earth?
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A IRAF xgterm implot unresponsive (mac OS High Sierra 10.13.3)
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I Was the Universe Really Dark and Quiet After the Big Bang?
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Help with an Apollo space program flight simulation guide
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I Observation of Alfvén waves heating the Sun's corona
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A Lane-Emden Eqn 5: Solving for Polytropic Index
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I Chandrasekhar Mass and the Relativistic Star: Finding the Value of K for n=3
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I Is the Sun's Magnetic Field Driven by a Double Dynamo?
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B Spiral galaxies: Multiple axies of rotation?
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A What is the importance of EM measurements in astrophysics?
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B Massive Space Objects Have Connections to QM Math
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I Confusion about Corotational and Lindblad resonance
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I Calculate Voyager trajectory using JPL data
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B Are the profiles for reflecting/refracting spherical?
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Revolutionizing Space Travel: The Innovative Design of the Circular Module
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I How close is Earth to the closest black hole?
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B Are Dark Matter Concentrations on Earth Seasonal?
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I Wonderful new images of the center of our galaxy
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I Can a Single Observation Determine Retrograde Motion?
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I Perceived vs. Actual Velocity in an Expanding Universe
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B How large would the sun be if it were frozen?
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I Lunar apsidal precession relative to equinox
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B When Does a Star Form & What's Best for Life?
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I Does the pattern of the CMB change?
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B What do I need to become an Astrophysicist?
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