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
Graduate Discovering the Shape of the Universe: An Elegant Inquiry
- Rainbow
- · Replies 29 ·
High School Do we know what type of organism first started life on Earth?
- nukeman
- · Replies 1 ·
Graduate When can true singularity take place? Was the big bang the only chance
- baywax
- · Replies 65 ·
Undergrad How to Calculate Gravitational Acceleration on a Planet with Core and Shell?
- jrw
- · Replies 7 ·
Undergrad Are There Recent Findings on Earth-Sized Exoplanets and Instrument Limitations?
- madman143
- · Replies 2 ·
Graduate Can Earth Orbit a Black Hole Indefinitely?
- CentricStorm
- · Replies 2 ·
Undergrad What Would Happen If We Turned Off the Sun's Gravity?
- Timmulus
- · Replies 18 ·
Graduate Published data sets for distance modulus versus redshift
- redtree
- · Replies 5 ·
Graduate Can dark matter annihilation produce the observed gamma ray emissions?
- physalpha
- · Replies 1 ·
Graduate Does matter bend spacetime enough to make the universe wrap around on itself?
- thehangedman
- · Replies 6 ·
Graduate The Role of EM Radiation in Cosmology Today
- giann_tee
- · Replies 7 ·
Graduate Does Gravity Travel at the Speed of Light?
- AdkinsJr
- · Replies 4 ·
Graduate Could dark matter be explained as a quantum gravity effect?
- ensabah6
- · Replies 2 ·
Graduate How can I access the Hipparchus HR Diagram data for my project?
- Mu naught
- · Replies 1 ·
Graduate Three times as many stars? (new estimate by van Dokkum and Conroy)
- marcus
- · Replies 1 ·
Graduate Building Blocks of Life: Paradox of Drake Equation Fl Term
- madman143
- · Replies 5 ·
Undergrad Structure for mid-semester report on Hubble and Chandra data analysis
- The_shadow
- · Replies 1 ·
Undergrad Universe contains many more red dwarfs than previously thought
- Grep
- · Replies 1 ·
Graduate New figure for speed of solar system relative to the ancient light
- marcus
- · Replies 1 ·
High School Can Cosmic Rays Penetrate Stones, Mountains, and the Human Body? Answers here!
- mackreg
- · Replies 5 ·
Undergrad Easy A Courses for Science Majors: Astronomy vs. Intro to Psychology
- sportsstar469
- · Replies 22 ·
Graduate Could Fermi bubbles account for dark matter?
- komodekork
- · Replies 21 ·
Undergrad How Far Away Are the Farthest Quasars in the Universe?
- grant9076
- · Replies 11 ·
Graduate How did matter go so far so fast?
- tesseract7d
- · Replies 6 ·
Graduate The fate of the Universe - big rip, then big crunch?
- DavidGahan
- · Replies 5 ·
Graduate Is Fusion possible at the accretion disk of a Black Hole?
- Qentanglement
- · Replies 5 ·
Undergrad Just need someone to clear something up for me
- iminhell
- · Replies 2 ·
Undergrad Where Can I Find Resources on Orbital Mechanics for Game Development?
- Speedo
- · Replies 1 ·
Undergrad Converting Jupiter moon orbital period and semi-major axis to years and AU
- nukeman
- · Replies 3 ·
High School How Do Meteor Showers Occur?
- harp AP 2010
- · Replies 1 ·
Undergrad What Formulas are Used to Put an Object into Orbit?
- edo1493
- · Replies 3 ·
Graduate Quantum/Relativitiy and the Speed of Light Paradox
- Grotug
- · Replies 11 ·
Graduate Miniscule changes in the physical constants?
- Edward Solomo
- · Replies 5 ·
High School Why Does the Moon Glow? Causes of Illumination
- dirtypunk
- · Replies 5 ·
Undergrad Are Black Holes Infinite and Do They Emit Jets?
- stever19
- · Replies 14 ·
Graduate Using Maxima for BTZ black hole metric calculations
- Canopus
- · Replies 5 ·
Undergrad If the universe came from a single atom, then
- nap
- · Replies 2 ·
Graduate Could intelligent life cheat God?
- GladScientist
- · Replies 13 ·
High School Studying for Intro Astronomy Exam: Galileo & Star Spectral Class
- University
- · Replies 2 ·
Graduate Why does the universe have to have a beginning?
- Vexa
- · Replies 22 ·
Graduate Calculation of CMB anisotropies size
- fab13
- · Replies 2 ·
Stargazing Binoculars or Telescope: Which is the Better Choice for Amateur Astronomy?
- blitzfu
- · Replies 4 ·
Graduate Unraveling the Universe: The Relationship Between Matter and Mathematics
- mateuszica
- · Replies 17 ·
High School Is there a 3D map of the naked-eye visible nightsky objects?
- alpskomleko
- · Replies 5 ·
Graduate What Is the Typical Magnetic Field in High Mass Stars?
- amarante
- · Replies 2 ·
Undergrad How dense could Earth's atmosphere potentially be?
- Uncle Al
- · Replies 5 ·
Undergrad Cometologist Brian Marsden Obit
- epenguin
- · Replies 0 ·
Graduate Is the Universe Infinite? Theories and Considerations
- NowIsForever
- · Replies 46 ·
Graduate Spectroscopic Analysis of the IR-Visible Galactic Core
- psholtz
- · Replies 5 ·
Graduate How Does Matter Influence the Universe's Expansion and Dark Energy?
- stever19
- · Replies 2 ·
Graduate Why the Sun Doesn't Move: Debunking Common Misconceptions About Solar Motion
- vin300
- · Replies 6 ·
High School General info on our solor system
- MillerGenuine
- · Replies 12 ·
High School Hubble Discovers New Supernova in Cygnus
- Philosophaie
- · Replies 4 ·
Undergrad Is the Universe Becoming More Orderly or Disorderly?
- leonstavros
- · Replies 20 ·
Undergrad What Forces Shape Bar-Centered Galaxies?
- physalpha
- · Replies 2 ·
Graduate Is the universe finite or infinite?
- mattex
- · Replies 179 ·
Graduate Can Black Holes Dance Around Each Other Without Merging?
- 6nqpnw
- · Replies 17 ·
Graduate Optimizing Gravitational Redshift Measurements: Techniques and Targets
- bigray69
- · Replies 6 ·
Graduate Extinction events and an astrolabe
- Panwasbipolar
- · Replies 2 ·
High School Our solar system's proximity to other ones
- jaketodd
- · Replies 9 ·
Graduate Unravelling the Mystery of "Faint Regime" in Cosmological Explosions
- spossatamente
- · Replies 1 ·
Graduate How is the Galactic Magnetic Field Measured and Modeled?
- amarante
- · Replies 2 ·
Graduate String stars instead of black holes?
- Maniax101
- · Replies 4 ·
Graduate Does the entire universe have a survival instinct?
- baywax
- · Replies 39 ·
Undergrad Kepler's Second Law: Equal Area in Equal Time
- harp AP 2010
- · Replies 2 ·
Graduate Unraveling the Mystery of Quasars: Are They Really Dying Out?
- Ramael
- · Replies 2 ·
Graduate Could White Holes Exist Beyond Black Holes in Higher Dimensions?
- timbuckiii
- · Replies 9 ·
Graduate Stellar Collisions: Modeling Neutron Star & White Dwarf Interactions?
- alvarogz
- · Replies 4 ·
Graduate Is the birth of the Universe a random event?
- Plebeian
- · Replies 23 ·
Graduate What Is the Universe Expanding Into and How Fast Is It Growing?
- Negativ3
- · Replies 24 ·
Undergrad Weather Ballon with Camera/GPS payload. 1x600g or 2x600g balloon for lift?
- Rbai63
- · Replies 3 ·
Graduate Is Our Perception of the Universe Just a Black Box?
- Physics-Learner
- · Replies 107 ·
Graduate Can we make a standard Universe clock?
- physalpha
- · Replies 6 ·
High School What was the level of astronomy like in say 1888?
- stany
- · Replies 11 ·
Graduate Binary w/ black hole - semi-major axis?
- accountkiller
- · Replies 2 ·
Undergrad Origin of Cosmic Rays: Intensity Explained
- logearav
- · Replies 5 ·
Rare, not so well known facts about Andromeda. ?
- nukeman
- · Replies 16 ·
Graduate Could We Detect and Avoid a Black Hole Approaching Our Solar System?
- Chimps
- · Replies 14 ·
Graduate How does GR slow a homogeneous universe?
- mysearch
- · Replies 13 ·
Other Solar Systems: What Are They?
- mreq
- · Replies 17 ·
Graduate Does the universe have zero total energy?
- DJsTeLF
- · Replies 3 ·
Graduate Is this equation I made correct?
- zeromodz
- · Replies 4 ·
Undergrad Detecting a small object in space.
- NewSkol
- · Replies 3 ·
View Milky Way in Oregon: Tips for Naked Eye Viewers
- Smartoad
- · Replies 7 ·
Graduate Is gravity really a force of universal attraction?
- Pesj
- · Replies 15 ·
Graduate An interesting notion about inflation.
- zeromodz
- · Replies 3 ·
Allan Sandage, Astronomer, Dies at 84; Charted Cosmos’s Age and Expansion
- diogenesNY
- · Replies 1 ·
Stargazing What features of Andromeda Galaxy can you make out with an Amateur Telescope?
- nukeman
- · Replies 2 ·
Graduate CMB fluctuations related to dark matter and normal matter?
- bcrowell
- · Replies 2 ·
Graduate Einstein + Hawking = Dark Matter ?
- gutemine
- · Replies 12 ·
Alien life forms, do they exist?
- Rob060870
- · Replies 42 ·
Undergrad Photons in Empty Space: Is Space Full?
- binbots
- · Replies 8 ·
Undergrad A burning question from a random thinker
- camraid
- · Replies 11 ·
Graduate A question on Gravity Waves and Gravity Radiation
- Tanelorn
- · Replies 3 ·
Undergrad New Dark Matter Map Solving Galactic Puzzle?
- sachinism
- · Replies 1 ·
Graduate Universe only appears to be expanding.
- Grajek
- · Replies 11 ·
Undergrad How a binary system affects gravity on members?
- proteus13
- · Replies 12 ·
Undergrad Equation of an Elliptical Orbit for a Moon around a Planet
- farore
- · Replies 1 ·
Undergrad Uncovering the Mystery of Potential Mars-Sized KBOs
- Dremmer
- · Replies 2 ·
Graduate Understanding Photon Decay in Vacuum: Rate, Influence, and Causes
- proteus13
- · Replies 9 ·