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 Eta Carinae Is Farther Than You Thought: 8,500 Light-Years
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I A discussion on "officially called a planet"
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A Why Does the Core of Certain Chromospheric Lines Appear in Emission in Sunspots?
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I Harmonic Convergence of Major Planets: Exploring the Solar System Barycenter
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How Do You Determine the Sun's Coordinates?
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B A Question Concerning Lunar Eclipses and Aristarchus's Work
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Stargazing The Moon through my El Crapo Telescope
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Least cost to get a self-sustaining space infrastructure
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B Neutron Star Collisions: Creation of Heavy Elements and Their Fate
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I Could entropy remain the same overall?
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I Do orbital dynamics scale linearly?
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I Why does the expanding universe redshift light?
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I Composition of the Sun: How We Know via Spectral Absorption Lines
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I Can Relativity Be Confirmed Again with a Star and a Black Hole?
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I Neptune images from VLT better than Hubble
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B Saturn's Rings Appearance from Saturn?
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B Attention: We have an important announcement from our Sun
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B General theory of relativity&Planet orbits
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I Liquid water reservoir reported under Mars polar cap
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I Which Main Sequence Stars Experience Hot Corona Phenomena Beyond G2?
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I Thoughts on Breakthrough Starshot?
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B Discussing Sterile Neutrino Candidacy as Dark Matter
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A Do any coordinate systems include self magnification?
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I Why is the Moon getting further from Earth ?
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Stargazing Help with how to start Stargazing
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I Spherical Symmetry/Simultaneity of Supernova Explosions
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B NYTimes: 79 Moons of Jupiter and Counting
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I Redshift and the Friedmann metric
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B Blazar as the Source of Cosmic Neutrinos Confirmed
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I White dwarf collapses into a neutron star and Energy is released
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B Known properties and constraints of dark matter
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I Chemical Elements produced inside the Sun
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B The Stefan-Boltzmann Law and Sunspots
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I Convincing a Flat Earther: Proving the Earth is Spherical
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I Space elevator and Coriolis force
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I Mass Equivalence of Photon Content Inside the Sun?
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I Image of a Newly Formed Planet in a Disk Around a Star
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I Particle acceleration and kinetic energy
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Stargazing Achieving Better Astrophotography at Home
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I About gravitational binding energy and kinetic energy
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Obituary of Constance Adams, Space Habitat Designer
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I Is the Milky Way's halo curved spacetime?
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B Why do most of the celestial bodies rotate about their axis?
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B Equivalent gravitational forces in other galaxies
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B Oumuamua non-gravitational acceleration
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B Please explain to me the 2d holographic universe
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B What is the role of a non-real observer in mathematical thinking?
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I How on Earth This is possible? (distance to a far galaxy)
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I How stellar aberration was quantified in the early days
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I How do we get stars so much more massive than the Sun?
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B History question -- The choice of the North Pole being up or down
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B What Makes Red Dwarf Stars Cooler Than the Sun?
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I Manned mission to Europa: science or still scifi?
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I How Does Angular Diameter Distance Apply to the Last Scattering Surface?
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I 2 second delay at the merger of two neutron stars in August 2017
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Stargazing A good telescope with tracking for deep sky objects
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B What is the Speed of Light in Dark Matter?
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Methane and Organic Molecules on Mars
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I Does the barycenter of the Earth-Moon system change?
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Stargazing Could the 1841 Meteor in Puget Sound Be Something Else?
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B Is space is continuous or discrete?
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B What is the speed of the Earth traveling through the cosmos?
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Stargazing How is noise removed in radio telescopes?
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I Question about the Na-O anti correlation
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B Would planets fall out of orbit when gravity has a speed?
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I What to do with unused space in a home freezer?
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Stargazing What makes the Thirty Meter Telescope a game-changer for astronomy?
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I Did NASA's Curiosity Rover Discover Ancient Organic Matter on Mars?
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I What does L star mean in the Schechter function?
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I Are displaced dark matter and curved spacetime same thing?
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Stargazing Spotting the ISS With My Binoculars: A Lucky Moment
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I Why Is the Velocity of an Oort Cloud Object Approximately Zero?
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I How to check if stellar/galactic spectrum extraction went well?
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B Is there a way to measure gravity in a particular area of space
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B LIGO's Detection of Gravitational Waves: BH-BH & BH-NS Mergers
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B Calculating Weight and mass of entire black hole
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B Spectroscopy of Stars: Electrons in Plasma
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I How is color added to Hubble images?
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I Understanding 2012 VP113's Perihelion and Its Significance in Planetary Origins
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B Could a Black Hole Cause a Sunrise in the West?
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I Did astronomers just lengthen the expected life of the Sun by 5 Gy?
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A Does a Quasar Have Proper Motion?
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I Perceived Speed of Objects in Space
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Stargazing What Causes the NEQ6 Pro Mount to Have 'Brain Failure' During Alignment?
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I V774104: Mysterious Sednoid with No Known Orbit
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I Andromeda and the cosmological redshift
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Stargazing Where did oxygen come from? Stars or something else?
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I Relationship between stellar mass and core mass?
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I Frequency of nearby Supernova Explosions
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I Atmospheric CO2 and diurnal Asymmetry
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I How can I go about making a "Space Proof" coating?
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B Did Astronomers Really Think the Milky Way Was the Only Galaxy in 1900?
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I On gravity and the conservation of energy
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Stargazing Zeiss Terra ED 10x42 Binos for stargazing?
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A What are the typical uncertainties of data in Astophysics?
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B The Search for a Neutron Star or Black Hole Nearby
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I Gravitational difference between a black hole and a star
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I Are Stars and Planets Differentiated by Nuclear Processes in the Solar System?
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I Is there a plan for a search for nearby black holes?
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Stargazing Geomagnetic Storming: High Latitude Regions Alerted 15-18 Feb
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