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 Does Mass Bend Time?
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High School Vectors & Gradients: Confused? Get Answers Now!
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Undergrad Is Jupiter too big to orbit the Sun?
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Undergrad Quasar Brightness: A Case of Light-Days or Light-Years?
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Graduate Need help with satellite navigation? Any textbook recommendations?
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Undergrad Rotation curves of galaxies as a function of isolation.
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Undergrad First atmospheric spectroscopy of Earth-sized exoplanets
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Stargazing Radio Telescope Building Guide for Beginners
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Undergrad Explore the Immense Universe with the Incredible 3D Map | CS Monitor
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High School Where Can I Find Math for Black Hole Firewalls?
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Undergrad Who really found out the Universe's acceleration?
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Undergrad Which light do we use to measure flux?
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Undergrad Scale factor/redshift formula wrong at the end?
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High School Could a research base on Mercury be the key to unlocking solar mysteries?
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Undergrad Energy Released in Stellar Nucleosynthesis
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Undergrad 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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Undergrad Escape Velocity: Unraveling the Mysteries of Kinetic & Potential Energy
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Undergrad 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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High School 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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Graduate Is there a polarisation of the microwave background
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Stargazing Is it worth getting a telescope?
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Undergrad Why do nebulae tend to collapse into discs?
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High School 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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Undergrad Solar physics: coronal holes & sunspot cycles
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Graduate Could Earth Support Two Moons in Different Orbits?
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High School Outer Solar System Origins Survey, Dwarf Planets and TNOs
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Undergrad Stopping or re-routing comet 67p
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Undergrad How Can We Measure Redshift Using the Spectrum of a Star?
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Undergrad How can we measure a galaxy's velocity via a star?
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Undergrad Determine the temperature of a star via its spectrum
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High School Pale Red Dot Mission: Launching Probes to Alpha Centauri in 2030s
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High School Influx vs. radius equation, mistake in the dimensions?
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Undergrad Why do we calculate the density of states using k-space?
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Undergrad Neutron Star Stability: Speed of Sound vs Light
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Undergrad Seeing the Martian moons with a pair of $60 binoculars
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Undergrad How ancient found that sun is too far from earth?
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Undergrad Sun and hydrostatic equilibrium
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Graduate Must Planetary Systems Have Retrograde Orbit Planets?
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Undergrad Disequilibrium of the solar system
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Undergrad Why does temperature always rise in stars?
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Undergrad The cold interior of the Sun seen in a sun spot
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Graduate When Will Preliminary Gaia Data Be Released?
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High School Could We Colonize Mercury Using Sunshades and Heat Shields?
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High School How did direct collapsing black holes form so early in the universe?
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High School How exactly do SMBHs in the center of galaxies form
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Graduate Nature of radiation emanating from a body v/s frequency
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High School Orbital parameters of stars orbiting Sagittarius A*
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Undergrad Are Black Holes Truly 3D Phenomena?
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Undergrad How to define the rotation of a planet in retograde orbit?
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High School How far from the core is the photosphere/chromosphere?
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High School ASTRO-H Failure Puts Promising Mission in Jeopardy | JAXA Update
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Undergrad Does the Universe have a centre, yes or no?
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Undergrad How well are orbital inclination oscillations known?
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High School Aphelion: See Sun's Size Change Over Year on YouTube
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Stargazing New Radio Telescope is World's Largest
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High School How can I do Astronomy from home?
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High School Constructing Space Without Points: Agree/Disagree?
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High School How does having long exposure help with distance in photos?
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Undergrad Seeking "simple" orbital path planning for game development
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Undergrad Can someone please explain to me Leavitt's law?
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High School A new quasi-satellite was discovered in April: 2016 HO3
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High School Understanding the Weakness of Gravity and its Role in the Universe
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Undergrad Radius and Mass of an Unknown Planet
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Undergrad What Size Space Bombs Would Detonate in Midair Based on Their Composition?
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Graduate Does Dark Energy follow the same rule as energy?
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Undergrad Light and our atmosphere (some quantum physics)
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High School What exactly is L, Lz and E in orbital mechanics?
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Stargazing Deep Space Imaging and stacking images for less noise
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Undergrad Dark Matter: Can Gravitational Field Be Generated?
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High School Quasars & Fusion: Could They Generate Energy from Fusion?
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Undergrad Why do we need "planetary equilibrium temperature"?
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High School Barycenter: Objects orbiting each other
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High School Is There a Limit to How Much Light Can Be Stretched Out in a Black Hole?
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Undergrad Youtube video about the sound of a pulsar
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Stargazing Is There More Than One Universe?
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Graduate Charged black holes and charge balance in galaxies
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Stargazing The terrible distortions of the Hubble Telescope
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Undergrad Does Black Hole Evaporation Violate the Second Law of Thermodynamics?
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Undergrad Astronomical improvements needed to discover a ex-solar moon
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High School Why do stars experience gravity more than its mass?
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High School Why Is the Sun Expanding & Getting Hotter?
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High School LIGO detects second gravity waves
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Undergrad Spacecraft Launches: Perigee & Apogee - Why Terminate?
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Graduate Stellar photosphere temperatures
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Undergrad How Do You Convert Parsecs to Arcminutes in Astrophysics?
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Stargazing Dealing with Dust and Condensation on Telescope Mirrors
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High School Cosmological data margins of error
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Undergrad Understanding the Polar and Equatorial Temperature Differences on Planets
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What does Astrophysics/Astronomy mean to you?
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High School What Happens to the Singularity Inside a Black Hole When It Evaporates?
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Undergrad Could Brown Dwarf Sub-Dwarf Companions Host Habitable Moons?
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High School Zero degrees longitude on other planets
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Stargazing Can you me with this Hershel telescope beam?
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