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.
Undergrad Methods of Hawking radiation generation
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Stargazing Focussing a Pentax K S2 with Live View for Moon Photography
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Undergrad Tight grouping of exoplanets 295RA 45dec
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Stargazing Looking for a beginner's telescope....
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Stargazing What was the reaction to the Hubble telescope's pictures?
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Undergrad Is the Sun considered a dwarf star?
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High School Ball Lightning and Stars: Unveiling the Spectral Similarities
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Undergrad Electric Dipole Moments: Sun, Earth, Planets, Minor Planets, Moons
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High School Time Lapse of Supernova SN1987A - 30 Years in Under a Minute
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High School High School video project: What is Gravitational Lensing?
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High School Astronomers' Opinion on Wow! Signal: Evidence of ET?
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Undergrad How to deal with the celestial meridian?
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Undergrad Dark Matter Size to be seen in our solar system
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High School What is difference between platenary core, mantle & crust?
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Undergrad Can anyone help with this satellite question?
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High School We have kittens in orbit around Saturn
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High School Where Can I Find the RA and Dec of the V1 Star?
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Cassini's Grand Finale - Fascinating New Insight
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Stargazing How Does Gravitational Lensing Work?
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High School What are the mystery lights in the sky and how can you identify them?
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High School Does the Singularity Really Exist Beyond the Standard Model?
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High School A terrestrial, temperate planet around Proxima Centauri
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Undergrad What spatial scales does dark matter become significant?
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High School Is there a way to prove that men have gone to the moon
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High School Understanding Black Body Radiation and the Sun's Color Temperature
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Stargazing Stunning 2017 Eclipse Photos of the Corona Chromosphere
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High School The Most Primitive Star-Forming Galaxy Ever Found
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Stargazing Child-like pleasure in seeing ISS and detached Dragon capsule
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High School Could we shade the Earth from the Sun to save Earth?
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High School How does the earth's magnetic field stop radiation?
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Undergrad What is the best source for COBE/WMAP/PLANCK mission data on the early universe?
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High School Miscellaneous Trivia: Planets and Moons
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Graduate Galaxy dynamics explained without DM or MOND
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High School Can Optical Interferometers Extend Beyond 1 Light Second in Length?
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High School Collision of Stars: How Often & How Many?
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High School What do you think of the new names for features on Pluto
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Stargazing Worth it to buy 2" eyepieces for Newtonian telescope?
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High School Pale Blue Dot Project: Img. Earth-Like Planet w/ 18" Mirror?
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Stargazing Yet another Wall Street Journal article about space debris
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Undergrad Questions about planetary magnetic fields
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Undergrad Event Horizon and the Mass of a Black Hole
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Undergrad What causes pressure in White Dwarfs and Neutron Stars?
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Graduate Is the Parenago Discontinuity a real thing?
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Undergrad Safe distance from a neutron star
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Undergrad Meaning of permeability in free space
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Undergrad Why are the planets revolving around their own axis?
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Undergrad Rainbows on Tatooine: A Binary Star System Mystery
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Stargazing Aurora Alert for 6th and 7th Sept
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Undergrad Virial Theorem and the Ergodic hypothesis
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Undergrad Comparison of tidal forces acting on the Moon vs Enceladus
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High School Uranus's Moon Cressida is Doomed
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Stargazing Sunspots visible for 2 Sept 2017
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High School Why does the Moon sometimes seem red?
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High School What Theories Explain the Nature and Changes of Space?
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High School See Asteroid Florence Tonight in Frankfurt Germany
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Undergrad Ammonia in icy moons of gas giants
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Undergrad Models of accretion disc emissions contradicted by experiment
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High School A Hypothesis To Observe The Formation Of Earth
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High School Most detailed picture of Antares
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High School What factors determine the timing of a solar eclipse?
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High School Asteroid Florence will soon pass Earth
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Stargazing The Sun today - 9 July 2017 - nice spot group
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High School Why Didn't the Earth Go Dark During Today's Solar Eclipse?
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Stargazing 'losing light' 1.25" DSLR coupling vs 2"?
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Stargazing 2 significant spot groups currently visible
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High School Is it possible to see sunspots with the unaided eye?
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High School If spacetime can be bent can it be broken?
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Undergrad Galaxy Rotation Curves: Newton's Shell Theorem Impact
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Stargazing Cloud of Moving Stars: Astronomy Phenomenon I Just Saw
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Stargazing Solar Con? Eclipse road trip to Makanda Illinois
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Undergrad Eclipse Path Explained: Earth's Axis & Moon's Incline
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Stargazing Protecting Optics (not eyes) During Solar Observing
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High School Capture in a 2-body system (not)
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Stargazing Welding glasses safe to view eclipse with?
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Undergrad How to model Solar System formation accurately and realistically
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High School Question about the shape of the Universe
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High School Goldilocks zones of other parameters
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High School A thought on the expansion of the Universe
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Stargazing Different Simultaneity for telescopes in space and earth?
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Undergrad Mysterious Agent Blows Up Moon: Can Earth Survive?
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Stargazing M8 Lagoon and M20 Trifid nebulae
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High School Our galaxy hosts millions of Black Holes
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High School Can gravitational waves interfere with each other?
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Undergrad Why centrifuges on Earth and in space would be the same?
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Stargazing Where's your favorite place to stargaze?
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Stargazing Erecting eyepiece diagonal: opinions?
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Stargazing Image of Galaxy M83 by Dave: July 2016
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High School Would we be able to completely stop time?
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Undergrad How common is automation in Astronomy?
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Undergrad What did we know about stars in 1950?
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Undergrad A new exomoon candidate: Kepler-1625b I
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High School Space Stationary Orbit: Possible to Park Ship for 1 Year?
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Undergrad Virgo joins the measurement of gravitational waves
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High School Why don't galaxies obey gravity?
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High School Picture of "very" blue galaxy, good place for super nova?
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High School Help me understand light traveling through vast distances in space
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Graduate Penrose: Noise in LIGO signal implies CCC
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High School Can someone please identify what I saw? (lights in the night sky)
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High School Distance between two orbiting bodies
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High School How can light travel around an object in space?
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