Join in expert discussion on the topics of Astronomy, astrophysics and cosmology. This may include discussion on celestial objects, space, and the physical universe as a whole. Mainstream science only.
Threads
High School GyratorIIVLFReceiver and 75 cm VLF loop antenne
- ogulcan
- · Replies 8 ·
Do Black Holes and Dark Matter Interact?
- iRaid
- · Replies 1 ·
Graduate About time, size and light speed
- ronald_dai
- · Replies 20 ·
Graduate A doubt from the book Galactic Dynamics from Binney and Tremaine
- krishna mohan
- · Replies 2 ·
Undergrad Right Ascension and Declination to the Horizon
- Philosophaie
- · Replies 4 ·
Undergrad Blue shift galaxies and the expanding universe
- nite owl
- · Replies 2 ·
Undergrad Can I accurately plot the orbits of our solar system's planets using equations?
- Breyyne
- · Replies 1 ·
Undergrad Was Kepler the First to Measure the Distances from Earth to All Known Planets?
- Thecla
- · Replies 11 ·
Stargazing Can we see the solar eclipse after 600 million years?
- Astro.padma
- · Replies 5 ·
Graduate Units used on Voyager golden record
- Lojzek
- · Replies 2 ·
Graduate How does eternal inflation explain the force behind inflation?
- dhillonv10
- · Replies 8 ·
High School Why Does Camera Flash Brighten Stars in the Sky?
- apeman2001
- · Replies 6 ·
Graduate Exploring Dark Energy and Quantum Gravity with Atom Interferometry
- wolram
- · Replies 1 ·
Graduate Why would inflation slow down because of gravity?
- guss
- · Replies 4 ·
Undergrad Any transfer orbit better than Hohmann?
- FakeGeek
- · Replies 1 ·
Graduate Net gravitational pull from Mars
- webbwbb
- · Replies 11 ·
Stargazing Mastering Telescope Collimation: Tips and Tricks for Perfect Alignment
- Drakkith
- · Replies 3 ·
Graduate AntiMatter/Matter balance in the Universe
- GammaBurst
- · Replies 14 ·
Graduate Calculating Gas Disturbance from a Supernova Explosion
- snowmonkey12
- · Replies 1 ·
High School Do even torch lights twinkle in the sky?
- Astro.padma
- · Replies 4 ·
Thermal expansion coefficient of Jupiter
- darknessvirtu
- · Replies 4 ·
High School Does twinklingdepends on the star or the distance?
- Astro.padma
- · Replies 12 ·
High School Why hasnt been artificial satellites torn apart?
- Astro.padma
- · Replies 7 ·
Graduate How did quasars form with such massive black holes?
- fillipeano
- · Replies 9 ·
Undergrad Could Trojan Asteroids Have Caused Earth's Collision with the Moon?
- GoodUniverse
- · Replies 3 ·
Graduate Explaining universe based on purpose/source
- jimjohnson
- · Replies 32 ·
Undergrad What is the potential of tethers for space exploration and satellite propulsion?
- Entropist
- · Replies 12 ·
Graduate Seeing Earth's Formation - Can We?
- locutus7
- · Replies 4 ·
Graduate Detecting Multiple Planets Around a Star
- cepheid
- · Replies 3 ·
Undergrad A Jupiter-mass companion to a solar-type star
- darknessvirtu
- · Replies 4 ·
Undergrad Bad programming skills = biggest hurdle to astronomy research
- Simfish
- · Replies 33 ·
High School Can someone calc these escape velocities?
- autisticmoose
- · Replies 2 ·
Graduate Particle based multiple universes?
- lowing99
- · Replies 2 ·
Graduate Can anyone help mess around with escape velocities?
- autisticmoose
- · Replies 3 ·
Graduate Can a planet or moon have two axes of rotation and remain tidally locked?
- Timoothy
- · Replies 6 ·
Graduate Question regarding red shift and tired light hypothesis
- rrosenthal
- · Replies 7 ·
Undergrad Freshman project in astrophysics
- m~ray
- · Replies 10 ·
High School Proof of satellite revolve around earth in circular path
- Steven7
- · Replies 1 ·
Graduate Does the Reduced Mass Trace an Ellipse in a Rotating Two-Body System?
- stinsonbr
- · Replies 1 ·
Graduate Does nuclear decay apply to atoms of matter consumed by black holes?
- LogicalAcid
- · Replies 2 ·
Graduate Path of light@ various distance from Black Hole
- Astro.padma
- · Replies 19 ·
Undergrad Gravity and Planetary Orbits: Ellipses, Circles or Hyperbolas?
- nhmllr
- · Replies 7 ·
Graduate Can the Universe Ever Truly Reach Heat Death?
- steenpat
- · Replies 4 ·
Graduate Astrophysics project gone wrong: why isn't the moon tearing the Earth apart?
- dBrandon/dC
- · Replies 4 ·
Graduate Can a region of space be free of energy?
- NeilWallace
- · Replies 2 ·
Graduate Is It Possible to Measure the Universe Before the Big Bang?
- PhilKravitz
- · Replies 10 ·
Undergrad What is the Point of Equal Gravity Between the Sun and Earth Called?
- Eagle9
- · Replies 12 ·
Graduate Is light really affected by gravity?
- Holocene
- · Replies 6 ·
Graduate Local effects of universal expansion
- bittramp
- · Replies 21 ·
Undergrad Which Universe Model is Most Widely Accepted?
- degree451
- · Replies 3 ·
Undergrad Possibility of Betelgeuse exploding in near future
- Simfish
- · Replies 8 ·
Graduate Objects collapsing to black holes
- snackster17
- · Replies 3 ·
Graduate Formation of neutron stars and black holes.
- LogicalAcid
- · Replies 3 ·
Graduate Is the Rate of Spacetime Expansion Faster Than the Speed of Light?
- aderowbotham
- · Replies 19 ·
Undergrad Could Alpha Centauri Host Habitable Planets Despite Their Short Stability?
- Plebeian
- · Replies 4 ·
Graduate A questions about black holes among other things
- aljay32
- · Replies 7 ·
Graduate Free energy or an infinite universe, which one is it?
- only_theory
- · Replies 5 ·
Graduate What Are Universal Forces Made Of?
- robproctor83
- · Replies 10 ·
Graduate Calculating the visibility of a satellite
- FrankDrebon
- · Replies 1 ·
Undergrad Can somebody please explain Olbers' paradox to me?
- TheBrownMamba
- · Replies 13 ·
Graduate Is Dark Matter a Neutral Force That Interacts Without Annihilation?
- RedDeadFox
- · Replies 1 ·
Graduate How Does Universe Uniformity Evolve Over Time?
- PhilKravitz
- · Replies 8 ·
Graduate Black holes, a simple theory, has it been looked into
- burgerdave
- · Replies 7 ·
Graduate Block Universe Theory: What Happens to Consciousness?
- rayshillay
- · Replies 2 ·
Graduate Why do we assume that the big bang implies a begining of time?
- mrspeedybob
- · Replies 10 ·
Graduate Black Hole: Conservation of energy
- darkside00
- · Replies 16 ·
Undergrad Does Chaos Theory Refute Evolution?
- z3hr
- · Replies 24 ·
Undergrad Expanding Universe: What Drove Early Universe Expansion
- joychandra
- · Replies 27 ·
High School Is the Earth's net charge really zero?
- username
- · Replies 5 ·
Graduate Interpreting Gravitation: Orbits & Ellipticals
- sciencecrazy
- · Replies 9 ·
Graduate Stability of a binary planet system
- Somes J
- · Replies 14 ·
Undergrad Help with HEALPix: Get Advice and Tips for Synfast & Anafast
- maverick280857
- · Replies 1 ·
Graduate Black hole, time and observations
- TungstenX
- · Replies 9 ·
Undergrad Converting Healpix file to traditional fits format
- Lyuokdea
- · Replies 1 ·
Graduate Why Is the 21 cm Line Key in the Search for Extraterrestrial Intelligence?
- bcrowell
- · Replies 2 ·
Undergrad Kepler Discovers Small Exoplanet
- nismaratwork
- · Replies 10 ·
Graduate Universe expansion really speeding up?
- deklore
- · Replies 16 ·
Undergrad Does Einstein's Static Universe Theory Disprove the Big Bang?
- LSulayman
- · Replies 5 ·
Graduate Universe Expansion - Terminal Velocity?
- Efar
- · Replies 3 ·
Undergrad Is there a 'simple' YORP calculation
- higginsdj
- · Replies 1 ·
Graduate Exploring the Effects of the Universe's Expansion on Faraway Galaxies
- itsthemac
- · Replies 9 ·
Undergrad Origin of the Moon: Did Luck Play a Role?
- conan
- · Replies 21 ·
Since When Has Everything in the Known World Been Discovered?
- Simfish
- · Replies 5 ·
Graduate How did Kepler arrive at his equation without calculus?
- alemsalem
- · Replies 3 ·
Graduate If we take bigger and bigger volumes
- Dmitry67
- · Replies 4 ·
High School Uranus Rotates On 2 Poles? | Learn About Its Movements
- Timoothy
- · Replies 2 ·
Graduate Gravitational Collapse of a Star
- Michel_vdg
- · Replies 18 ·
Graduate Eternal inflation and topology of the universe
- tom.stoer
- · Replies 25 ·
High School 2 Bright things in the sky. Which 1 is Venus? And what's the other object?
- johnnya
- · Replies 18 ·
Undergrad How do astronomers count stars in the Milky way? (procedure, method)
- nukeman
- · Replies 4 ·
Graduate Spacetime Expansion in Big Bang 100% Certainty?
- Alfrez
- · Replies 3 ·
Undergrad Is gravity an infinite source of energy?
- Xtensity
- · Replies 69 ·
Graduate Is Stephen Hawking's Black Hole Math Still Considered
- JMS61
- · Replies 5 ·
The formation of our Universe as we know it
- TryToThink
- · Replies 9 ·
Undergrad Milky Way; How do we know it's a spiral?
- AdkinsJr
- · Replies 10 ·
Graduate Dark Matter: Can It Stop Universe Expansion?
- LSulayman
- · Replies 4 ·
Graduate Circular restricted three body problem
- Deadstar
- · Replies 1 ·
Undergrad The Origin of the Universe: Big Bang, Explosion, or Something Else?
- MathematicalPhysicist
- · Replies 12 ·
High School Where Is Dark Matter in Our Universe?
- universe11
- · Replies 20 ·
Undergrad The number of space debris objects beyond the geostationary orbit
- Eagle9
- · Replies 3 ·