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 Structure of galaxy and the laws behind it
- shivakumar06
- · Replies 3 ·
High School Earth as a Capacitor: Lightning & Rain
- shivakumar06
- · Replies 3 ·
Graduate Interaction of three black holes
- shivakumar06
- · Replies 1 ·
Undergrad Can Black Holes Be Broken Apart?
- shivakumar06
- · Replies 2 ·
Undergrad Radio Waves from Stars: Investigating the Mysteries
- shivakumar06
- · Replies 1 ·
Undergrad Where Do Electrons Go in the Plasma State of Stars?
- shivakumar06
- · Replies 2 ·
Graduate Is Dark Energy Actually the Pull of Black Holes?
- rhyshanan
- · Replies 8 ·
Graduate Did Matter Exist Before Time? - Hartle-Hawking State
- Mayank_Jha
- · Replies 1 ·
Graduate Properties of Matter in Vacuum (Space)
- sshai45
- · Replies 1 ·
Graduate Gerald Shroeder and the age of the universe
- Onestone
- · Replies 6 ·
Graduate Could Black Holes Expand in Negative Dimensions and Create a Negative Universe?
- swaroop
- · Replies 5 ·
Did Anyone See Asteroid "Beast" Fly By Earth?
- Creator
- · Replies 19 ·
Graduate Matter vs Anti-Matter: What Survived the Big Bang?
- shounakbhatta
- · Replies 9 ·
What Are Some Recommended Astronomy Books for Laypersons?
- cjackson
- · Replies 5 ·
Graduate The black Hole Wars - Losing Information in the Hawking Radiation
- m_robertson
- · Replies 9 ·
Graduate Simple explanation of the lunar highlands problem
- D H
- · Replies 1 ·
Graduate 2-point correlation functions for curvature perturbations
- WannabeNewton
- · Replies 12 ·
High School Give Me Some Perspective: Size of Universe?
- kyphysics
- · Replies 11 ·
Graduate Space-Time & Matter: Explaining the Difference
- Yoozer
- · Replies 2 ·
Graduate Mass required for a closed universe.
- duordi134
- · Replies 16 ·
Undergrad Astronomers Measure Hubble's Constant at 68 km/s/Mpc | Space.com Study
- chasrob
- · Replies 6 ·
High School Unidentified Constellation: Deciphering Star Patterns and Their Meanings
- Ritzycat
- · Replies 5 ·
Undergrad Can Black Holes Increase in Mass?
- Nova
- · Replies 5 ·
Graduate Must (Ve) expansion of the universe be C?
- bobie
- · Replies 56 ·
Graduate Implications of the divisibility of time for the study of the big bang
- Toppy123
- · Replies 1 ·
Graduate Final State of the universe 10^ googal plex^ googal?
- biocarb6
- · Replies 1 ·
Simulated Universe: Who or What is the Creator?
- binaryverse
- · Replies 1 ·
Graduate Closed Universe? Local H0 Measurements & Relativistic Corrections
- Chronos
- · Replies 4 ·
Undergrad DECIGO: Launch Date & Funding Status
- skydivephil
- · Replies 4 ·
Graduate Numerical Facts about the Milky way's halo
- majormuss
- · Replies 2 ·
Graduate Inclination of Equatorial North Pole relative to Galactic Equator
- fizixfan
- · Replies 8 ·
Graduate Gravitational attraction on the cosmic scale?
- Vincentius
- · Replies 42 ·
Graduate Why does a singularity have to exist?
- eldred
- · Replies 3 ·
Graduate Why Are Statistical Significance Maps Used in Cosmic Ray Anisotropy Studies?
- vaart
- · Replies 3 ·
Graduate Is the Universe's Shape Spherical or Hyperbolic?
- elusiveshame
- · Replies 8 ·
Undergrad Is the CMB a Distorted Image of the Early Universe?
- Doctor
- · Replies 8 ·
Graduate If every event is governed by one or more laws
- iDimension
- · Replies 6 ·
High School 40,000 years taken for light to reach here?
- adjacent
- · Replies 16 ·
Graduate If black holes don't exist then neither does the cosmic horizon?
- nuclearhead
- · Replies 3 ·
Graduate BICEP2 & Penrose: Inflation's Impact on Proving Initial Conditions
- twistor
- · Replies 12 ·
Undergrad What do we exactly mean by space is expanding?
- Yashbhatt
- · Replies 47 ·
Graduate Calculating Redshift for Objects in the Universe
- bobie
- · Replies 17 ·
Martians observe Mercury solar transit
- Creator
- · Replies 3 ·
Undergrad Is Space Within Atoms Also Stretched by the Big Bang?
- vijayst
- · Replies 25 ·
Stargazing Whats an innovative idea for a nuclear telescope?
- Praetorian
- · Replies 2 ·
How to identify that light in the sky
- Greg Bernhardt
- · Replies 10 ·
Graduate Can someone explain why we need inflation?
- nuclearhead
- · Replies 21 ·
Graduate What if there is no Dark Matter?
- Elizabeth90125
- · Replies 11 ·
High School Focal length short and long. Which to choose?
- Tyrion101
- · Replies 7 ·
Graduate Dark matter distribution around black holes.
- majormuss
- · Replies 5 ·
Stargazing Celestron Powerseeker 60AZ Telescope
- PhysicoRaj
- · Replies 4 ·
Tracking the International Space Station
- Borg
- · Replies 9 ·
Graduate Is Saturn's 63rd Moon Being Born?
- PhysicoRaj
- · Replies 2 ·
Graduate Possible research topics for high redshift galaxies and AGN
- Cptn.Shelly
- · Replies 4 ·
Undergrad Stars Creating Elements Heavier than Iron
- SYahoo
- · Replies 4 ·
High School Can a body in space form a sphere?
- iwant2beoz
- · Replies 14 ·
Graduate A layman with an idea, foolish perhaps
- Deuterium1971
- · Replies 7 ·
Undergrad Voids inside atoms and voids in space?
- Monkey71Miaman
- · Replies 2 ·
Undergrad How can Google Sketchup simulate Sun and Earth movement for seasonal changes?
- thedy
- · Replies 5 ·
Graduate Speed of Light Affecting Objects' Appearances?
- connorp
- · Replies 5 ·
High School Sun & Moon Coincidence: A Remarkable Fact
- cosmosmike
- · Replies 7 ·
Graduate Rate of expansion of the universe
- TonyB178
- · Replies 4 ·
Graduate Is the expansion accelerating or decelerating?
- Yashbhatt
- · Replies 10 ·
Graduate How Did Scientists Miscalculate the Distance of UDFj-39546284?
- bobie
- · Replies 16 ·
Undergrad Conics and Beyond: Understanding Trajectories in Multiple Gravitational Fields
- Jhenrique
- · Replies 1 ·
Graduate Traces of Theia Found on The Moon
- anorlunda
- · Replies 6 ·
What is your favourite episode of Cosmos: A Space-time Odyssey?
- interhacker
- · Replies 14 ·
High School Discover Mega-Earth: Kepler-10c 17x Heavier Than Earth
- Greg Bernhardt
- · Replies 3 ·
Undergrad Red Shift & Blue Shift: Explained
- dm4b
- · Replies 4 ·
Graduate Concordance value of Hubble growth rate (2014)
- marcus
- · Replies 3 ·
Graduate Questions on Hubble's law and Friedmann equation
- kdlsw
- · Replies 2 ·
Graduate Tidal Acceleration and planetary rotation
- AotrsCommander
- · Replies 4 ·
New Cosmos: A Spacetime Odyssey 2014 TV Series
- berkeman
- · Replies 118 ·
Graduate Gamma Ray Burst datasets that consist of distance modulus & redshift
- kosmolog
- · Replies 6 ·
Graduate What is the connection between Kolmogorov complexity and randomness?
- Duhoc
- · Replies 8 ·
Undergrad Understanding the Expanding Universe and Its Impact on Earth's Distant Future
- kenny1999
- · Replies 13 ·
Undergrad If the universe is expanding, how can 2 galaxies collide?
- Lethal_Firefly
- · Replies 6 ·
Graduate Can Space Curve Without Mass or Energy?
- Duhoc
- · Replies 18 ·
Graduate Information conservation and Big Bang
- anorlunda
- · Replies 18 ·
Graduate Question concerning density of dark energy
- CosmicTheorist
- · Replies 2 ·
High School Is the fabric of space displaced by a mass object in it?
- webboffin
- · Replies 8 ·
Graduate How Does the Velocity of Distant Stars Relate to the Mass of the Universe?
- cosmosmike
- · Replies 2 ·
Graduate Non-anthropic String Theory Landscape and Finite Universes
- twistor
- · Replies 9 ·
Graduate Five Cepheids Detected on the Other Side of the Galaxy
- CygnusX-1
- · Replies 2 ·
Graduate Is the concept of finite mass-energy in the universe outdated?
- Jobrag
- · Replies 2 ·
Graduate Need rebutal for plasma EU theory
- tanzanos
- · Replies 1 ·
Graduate Friedmann's Acceleration Equation
- johnnnyboy92
- · Replies 3 ·
Graduate Could Supermassive Black Holes At The Center Of Galaxies Be Wormholes?
- stevebd1
- · Replies 1 ·
Graduate How does a nebula form from a neutron star
- kdlsw
- · Replies 5 ·
Graduate Is Inflation Eternal Into the Past?
- saleh
- · Replies 4 ·
Graduate DeSitter and AntiDeSitter Universe
- Quantizer
- · Replies 4 ·
Graduate Conservation of Energy in the Universe at Large
- Islam Hassan
- · Replies 13 ·
Graduate Big Rip Compatible with Flat Universe?
- Islam Hassan
- · Replies 3 ·
High School Is Saturn the Night Object in Photos?
- DennisN
- · Replies 20 ·
Graduate Did Electrons Form Before Quarks? Chronology of Universe's Reheating Phase
- avito009
- · Replies 6 ·
Undergrad Can dark energy be a different dark matter?
- Puchinita5
- · Replies 7 ·
Graduate Cosmology for Enthusiasts: Understanding Bicep2 Data
- Duhoc
- · Replies 3 ·
Undergrad Detect planets in solar systems like ours
- nicoo
- · Replies 2 ·
High School What causes a supernova to occur?
- frankhawes
- · Replies 13 ·
Graduate A few questions about size and shape
- iDimension
- · Replies 2 ·