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 SN 1a Progenitor Classes: Statistical Analysis
- Chronos
- · Replies 2 ·
High School Why is our moon exactly half when half?
- rogerk8
- · Replies 38 ·
Graduate Speed of light (from redshifted galaxies)
- Myslius
- · Replies 5 ·
Graduate Did the Big Bang create gravity and matter?
- marcmongeon
- · Replies 3 ·
Graduate Moon orbiting close to its host planet
- willstaruss22
- · Replies 2 ·
High School Our sun to soon reverse its magnetic field
- Naty1
- · Replies 24 ·
What is the Scale of the Universe?
- MathJakob
- · Replies 2 ·
High School What is the definition of cosmology in a physics context?
- Clayjay
- · Replies 7 ·
Graduate Fate of relict radiation patterns
- snorkack
- · Replies 14 ·
Graduate Castor Binary (6 star hierachy) system, how is it stable?
- Edward Solomo
- · Replies 14 ·
Undergrad How does Jupiter protect Earth from comets and such?
- jenny_shoars
- · Replies 7 ·
Looking for composite picture of Milky-way from outside galaxy
- jackmell
- · Replies 4 ·
Graduate How and how much does is the cosmological red shift affected?
- LuckyNate
- · Replies 2 ·
Undergrad Can Neutrino Detectors Predict Supernovae?
- Romulo Binuya
- · Replies 8 ·
Graduate Higgs-driven cyclic conformal cosmology (Steinhardt Turok Bars)
- marcus
- · Replies 14 ·
Undergrad Understanding Gravity at Long Distances
- Deepak K Kapur
- · Replies 31 ·
Graduate Hydrodynamical description of photons
- wphysics
- · Replies 12 ·
Graduate Suppose space comes into existence
- keepit
- · Replies 1 ·
Graduate The Meissner effect within a galaxy
- Feonix
- · Replies 1 ·
Undergrad What methods are used to measure cosmic distances?
- Romulo Binuya
- · Replies 1 ·
Viewing the Northern Lights in Nov/Dec
- JackMartinelli
- · Replies 3 ·
Size of all things in the universe
- McCartney
- · Replies 24 ·
Graduate Is an accelerating universe consistent with the conservation of energy
- Bobcent
- · Replies 11 ·
Graduate Additional Emperical Observations of the Sachs-Wolfe Effect?
- falcon32
- · Replies 5 ·
Graduate Can Colliding Black Holes Solve the Mystery of Short-Duration Gamma-Ray Bursts?
- Digitalism
- · Replies 8 ·
Graduate Does captured light increase a black hole's mass?
- Decimator
- · Replies 3 ·
Graduate Is a Dynamic Dark Information Energy Consistent with Planck Data?
- Chronos
- · Replies 1 ·
Graduate Do new objects ever become visible to us for the first time?
- QuestionMarks
- · Replies 3 ·
Undergrad Is Shutting Down the Space Fence Putting Our Satellites at Risk?
- BobG
- · Replies 3 ·
Graduate Could Super Earths have Earth like atmospheres?
- willstaruss22
- · Replies 5 ·
What Makes the Oregon Star Party a Must-Visit for Stargazing Enthusiasts?
- OmCheeto
- · Replies 1 ·
Undergrad How can we 'see' back to the early universe?
- Graeme M
- · Replies 18 ·
Graduate Relativistic Effects of a Black Hole
- m_robertson
- · Replies 19 ·
Graduate Cosmological Redshift Question
- Drakkith
- · Replies 21 ·
Graduate Spatial dimensions of our universe
- cryptist
- · Replies 3 ·
Graduate What Are the Flaws in Personal Theories About the Big Bang and the Multiverse?
- dilsfunspot
- · Replies 1 ·
Graduate If a strong gravitational wave hit Earth would clocks record it?
- wolram
- · Replies 27 ·
Graduate Feynman's New Zealand lecture, Inca astronomy, rule and reason.
- Spinnor
- · Replies 2 ·
Graduate Nuclear Fusion process in the Sun (or generally, any star)
- Positron137
- · Replies 18 ·
Graduate Does Light from Distant Stars Travel Slower than Light from the Sun?
- cliffes
- · Replies 9 ·
Graduate Why the discrepancy between telescopes and big bang?
- scott22
- · Replies 12 ·
Graduate Kilonovas caused by black hole neutron star mergers
- Tanelorn
- · Replies 5 ·
Undergrad Idea about Mars atmospheric loss
- willstaruss22
- · Replies 1 ·
Undergrad How Does Hubble See Distant Galaxies Through Our Own?
- Yosty22
- · Replies 17 ·
Graduate Possible criteria or parameters for planetary collision?
- Positron137
- · Replies 8 ·
High School After Pluto what are new horizons plans?
- Tyrion101
- · Replies 5 ·
Graduate What is the role of dark energy in the potential occurrence of a Big Crunch?
- Nugso
- · Replies 15 ·
Graduate What Is the Gravitational Field Strength Within a Uniform Thin Disk?
- tade
- · Replies 2 ·
Stargazing How far can the best telescope see?
- siddharth23
- · Replies 16 ·
Graduate Where Can I Find References for Galactic and Cosmological Numbers?
- pellikkan
- · Replies 3 ·
What Was the Title of the 1970s Scientific American Article on Supernovas?
- anorlunda
- · Replies 5 ·
Graduate Hawking's Position on Repeating Big Bang
- David_Baratheon
- · Replies 4 ·
Graduate Seriously gritty videojournalism applied to cosmology by Skydive
- marcus
- · Replies 4 ·
Astronomy book listing Ceres as a planet?
- jenny_shoars
- · Replies 10 ·
Undergrad How is the Universe Expanding?
- Alonzo.nieves
- · Replies 3 ·
Graduate How to Generate Initial Conditions for Modeling Galactic Spiral Arms?
- fab13
- · Replies 1 ·
Undergrad Measuring Redshift to Support Accelerating Universe
- azerbajdzan
- · Replies 33 ·
Graduate Dark Matter or Modified Gravity ?
- wilha
- · Replies 36 ·
Graduate Can the Many Worlds Theory and Biocentric Theory Co-Exist?
- JordanSC5
- · Replies 16 ·
Graduate Force of Gravity in a 2 Dimensional Universe
- starfish99
- · Replies 2 ·
Graduate If universes are being spawned by a mother universe
- CCWilson
- · Replies 5 ·
Graduate Is it certain that CMBR originates from the 5% of ordinary matter?
- Tanelorn
- · Replies 31 ·
Graduate How to calculate mass of closed Universe?
- johne1618
- · Replies 5 ·
Graduate Amount of nuclear power need to propel a shuttle at the speed of light
- vanvlizr
- · Replies 42 ·
High School Are black holes related to the big bang?
- 1MileCrash
- · Replies 8 ·
Graduate What Caused the Pioneer Anomaly?
- mathman
- · Replies 12 ·
Graduate Dark energy acceleration of space effect on red shift
- Clayjay
- · Replies 22 ·
Undergrad Need help to start with Healpix on IDL and Windows 7
- fineTuner
- · Replies 9 ·
Graduate Inflation Deflated ? the dead of inlation models ?
- audioloop
- · Replies 2 ·
Undergrad JPL News: Centaurs' Origins Revealed with WISE Data
- jim mcnamara
- · Replies 1 ·
Undergrad Can Traveling to Stars Reveal Earth's Past?
- imageek
- · Replies 27 ·
Graduate Dark Energy & Life: Can We Survive?
- Nugso
- · Replies 9 ·
Graduate 'Fast forward' vision when travelling towards a star?
- Gerinski
- · Replies 7 ·
Graduate What Is the Ratio of Baryonic to Dark Matter in the CMB?
- Philosopha
- · Replies 3 ·
Undergrad Where rest of inner solar system in Cassini picture from Saturn?
- jackmell
- · Replies 8 ·
Undergrad Positional Astronomy: Zenith, celestial poles and sidereal time
- kr75
- · Replies 2 ·
Graduate Various varieties of black holes
- DiracPool
- · Replies 10 ·
Graduate Define and measure inhomogenities and anisotropies
- tom.stoer
- · Replies 14 ·
Stargazing B mode detected by South Pole Telescope
- skydivephil
- · Replies 2 ·
Graduate Can We Identify Anti-Matter Galaxies?
- Aspchizo
- · Replies 24 ·
Graduate Second Kepler law for hyperbolas
- jaumzaum
- · Replies 2 ·
Graduate Is the universe eternal and cyclic? Evidence from the CMB
- petergreen
- · Replies 8 ·
Graduate Meissner sees Penrose-type circles in Planck CMB map
- marcus
- · Replies 7 ·
Graduate Is Conformal Cyclic Cosmology a Viable Explanation for the Big Bang?
- tdecelles
- · Replies 4 ·
High School How large a mass would it be if all matter was collected together
- webboffin
- · Replies 15 ·
Graduate Mechanical Energy - Self energy of Universe
- Philosopha
- · Replies 7 ·
Graduate Galaxy rotation curve of higher mass galaxy with same size
- Philosopha
- · Replies 9 ·
Earth from Space: A Fantastic Nova Documentary
- edward
- · Replies 1 ·
Undergrad YouTube channel Life on Enceladus
- Astrolekker
- · Replies 3 ·
High School Amateur Astronomy - Learn What to Look For in the Sky
- chemistry1
- · Replies 10 ·
Graduate Is there a centre to the universe
- rollcast
- · Replies 37 ·
High School Are Eclipse Glasses Truly Safe?
- Astrum
- · Replies 10 ·
Graduate Learn IRAF for Astrophysics: UofL Student Seeks Examples & Guidance
- bsleis01
- · Replies 1 ·
Graduate Randomness and the life cycle of events of our Universe
- Tanelorn
- · Replies 18 ·
Stargazing Helping my school with a telescope, advice appreciated
- jim hardy
- · Replies 5 ·
Graduate Appropriate statistical test for this situation?
- Jean Tate
- · Replies 3 ·
Graduate Is the Universe spinning on a vast scale?
- Orion1
- · Replies 24 ·
High School Why are there 12 months in a year instead of 365?
- Phy_enthusiast
- · Replies 21 ·
High School Gravity of Earth vs Sun to Moon: Which is Larger?
- sirwan
- · Replies 11 ·
Graduate How Can I Accurately Simulate the Earth-Apophis Encounter on April 13, 2029?
- Jano L.
- · Replies 11 ·