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 Searching for a Physics Book - Astronaut Dragging Personal Black Hole
- lechiffre
- · Replies 1 ·
High School Infinite Galaxy: Can Our Universe Really End?
- aricho
- · Replies 4 ·
Graduate Restricted circular 3 body problem RC3BP
- kristian jerpetjøn
- · Replies 1 ·
Graduate Exploding and Collapsing Stars: The Mystery of Dark Quark Bodies
- sd01g
- · Replies 1 ·
Graduate The Dark Age of the Early Universe: How Did the CMBR Reach Us?
- cyleung_2001
- · Replies 13 ·
High School Sirius - habitable orbit? (link)
- MonstersFromTheId
- · Replies 6 ·
Graduate A star located 135 degrees from the solar apex on the celestial sphere
- ek
- · Replies 1 ·
Undergrad How can empty space give off radiation from the Big Bang?
- Chemical_Penguin
- · Replies 11 ·
Reminder about Deep Impact on night of July 3
- marcus
- · Replies 8 ·
Graduate Cosmological Expansion & Uniqueness of Gravity: Multamaki and Vilja
- wolram
- · Replies 6 ·
Graduate Can Space-Time Be Quantized and What Could That Mean for Physics?
- Physics101
- · Replies 3 ·
Undergrad Life evolving on a planet revolving a red dwarf?
- Gold Barz
- · Replies 7 ·
Undergrad Exoplanets in Habitable Zones: HD28185, HD108874, Gliese 876
- marcus
- · Replies 5 ·
Graduate Current galaxy formation in the CDM model
- hellfire
- · Replies 10 ·
Graduate Fluctuation Theorem, Big Bang Question
- Lucretius
- · Replies 1 ·
Graduate Multiverse just passes the buck on
- Chaos' lil bro Order
- · Replies 6 ·
Graduate What Are the Best Current Physics and Astrophysics Books for Graduate Students?
- cosmo_boy
- · Replies 4 ·
Graduate Origin of cosmic gamma ray background
- wolram
- · Replies 6 ·
Graduate Why is Mass-Energy Concentrated in Atoms, Solar Systems & Galaxies?
- Ratzinger
- · Replies 4 ·
High School Balck hole within 20 light years?
- rollingstone
- · Replies 9 ·
Graduate Acceleration At The Event Horizon
- mrjeffy321
- · Replies 29 ·
Undergrad Why is the Sky Dark Despite Countless Stars?
- lwymarie
- · Replies 10 ·
High School Earth's 'bigger cousin' detected
- Math Is Hard
- · Replies 16 ·
Undergrad Drake Equation: Estimating Life Supporting Planets & Detecting Life
- wolram
- · Replies 25 ·
Graduate What Makes Quantum Cosmology Different from Traditional Models?
- wolram
- · Replies 17 ·
Graduate A little direction regarding dark energy.
- Slimchandi
- · Replies 4 ·
High School How does other galaxies differ from out own?
- MightyMeanie
- · Replies 5 ·
High School What Can You Expect to See from Earth During the Comet Buster Impact?
- chief
- · Replies 5 ·
Undergrad Is DST Causing Confusion in Determining UTC for Historical Events?
- kepler
- · Replies 8 ·
High School What is the distance to the nearest star?
- MightyMeanie
- · Replies 7 ·
High School Texts on Introduction to Astronomy/Cosmology
- dekoi
- · Replies 3 ·
Graduate Moon-Earth Slingshot: Launching Craft to Other Solar Objects
- quetzalcoatl9
- · Replies 10 ·
Network to connect television satallite dishes
- pbj59
- · Replies 4 ·
High School What Can You Actually See in the Asteroid Belt with the Naked Eye?
- MonstersFromTheId
- · Replies 4 ·
Stargazing How do I properly set up a telescope mount for accurate tracking and viewing?
- Integral
- · Replies 2 ·
High School Why Variable Stars Change Magnitudes Periodically
- tmwong
- · Replies 2 ·
Graduate Dark Matter need not be for a stable Universe Sez'an'amateur
- timestill
- · Replies 10 ·
Stargazing What am I doing wrong? - Telescope Trouble
- Felix83
- · Replies 7 ·
Graduate Cosmology: the scinece on the universe.
- cosmo_boy
- · Replies 4 ·
Graduate Black hole confusion Not uncommon, is it?
- "Requiescat in pace"
- · Replies 2 ·
Graduate Is There Really an Ocean Beneath Europa's Ice?
- MonstersFromTheId
- · Replies 4 ·
Undergrad Wien's law and black body emition
- Gabokappa
- · Replies 5 ·
Is Our Galaxy One of the Oldest?
- Gold Barz
- · Replies 6 ·
Graduate Can Dark Matter and Dark Energy Unify the Expansion of the Universe?
- wolram
- · Replies 2 ·
Graduate New one by Moffat (comparing fit to rotation curves)
- marcus
- · Replies 11 ·
High School Explosions in Space: No Use in Space?
- kurushio95
- · Replies 4 ·
Graduate How Was the Multiverse Formed According to Michio Kaku?
- dm84z28
- · Replies 2 ·
Graduate Vilenkin's Proposal: Can Absolute Nothingness Exist?
- agnostictheist
- · Replies 2 ·
Graduate Revisiting the Controversial Cosmic Censorship Hypothesis
- touqra
- · Replies 2 ·
High School Does nightime sky face outer or inner galaxy?
- Moonrat
- · Replies 7 ·
Graduate What is the Meaning of Scale Radius in Spiral Galaxies?
- minase
- · Replies 3 ·
Virtual Observatory: Cruise the Heavens from Your Recliner
- Chronos
- · Replies 4 ·
Graduate What would cause a black hole to explode?
- Vast
- · Replies 5 ·
Stargazing Is There a Way to View the Night Sky Without Leaving Your Computer?
- minase
- · Replies 1 ·
Graduate Reduced Circumference: Schwarzschild vs Kerr Metric
- Moore1879
- · Replies 1 ·
Graduate Did the Big Bang Theory Withstand Challenges from Eric Lerner and Metaresearch?
- Theatre Of Fate
- · Replies 14 ·
Testability thread is great (keeping comment/discussion out works, too)
- marcus
- · Replies 13 ·
Graduate What Happens If You Stick Your Hand Inside a Black Hole's Event Horizon?
- hedons
- · Replies 13 ·
Undergrad Quasars,white dwarf and neutron stars
- sage
- · Replies 8 ·
Graduate How Would the Universe Appear if Light and Gravity Were Instantaneous?
- Loren Booda
- · Replies 4 ·
Graduate My thoughts on Space-Time and Matter-Gravity
- Physics101
- · Replies 4 ·
Graduate Do Black Holes Violate the Laws of Thermodynamics?
- pakoppan
- · Replies 7 ·
Graduate Neutron diffusion and nucleosynthesis
- wolram
- · Replies 2 ·
Graduate Total Eclipse of the Sun: 40s Before Alignment
- Arctic Fox
- · Replies 2 ·
Graduate Artificial Blackbody & Artificial Black Hole: Reality or Theory?
- matness
- · Replies 1 ·
Graduate A solid surface model of the sun.
- Michael Mozina
- · Replies 1 ·
How many alien civilizations are existing in the Milky Way
- Gold Barz
- · Replies 22 ·
Graduate Is the Sun's Surface Actually Solid and Electrically Conductive?
- Michael Mozina
- · Replies 3 ·
Undergrad Calculating the age of the universe
- TheSpecialist
- · Replies 2 ·
Graduate Null Energy Condition: What Is It?
- touqra
- · Replies 1 ·
Graduate Could Light from Distant Stars Be Doppelgangers Due to Gravitational Lensing?
- c_helm@yahoo.com
- · Replies 1 ·
Graduate Random walk and universal expansion
- Loren Booda
- · Replies 2 ·
Graduate Is the Big Bang Theory Really Wrong?
- pmb_phy
- · Replies 11 ·
Graduate Time to reach thermal equilibrium with radiation
- hellfire
- · Replies 2 ·
Graduate Question about exploding neutron stars
- gonzo
- · Replies 3 ·
Stargazing Cost-effective digital camera and telescope
- dekoi
- · Replies 3 ·
Graduate BAre Galaxy Clusters Altering the Primordial Echoes from the Big Bang?
- wolram
- · Replies 6 ·
Graduate Space Finite: Flat/Open Universe Possibilities
- εllipse
- · Replies 30 ·
Who Here Is In The Rare Earth Camp?
- Gold Barz
- · Replies 7 ·
Graduate Maximum count for mutually bound stars
- Loren Booda
- · Replies 2 ·
Undergrad NBody evaluation, is my model correct?
- crepincdotcom
- · Replies 12 ·
Undergrad Blackhole at the center of each galaxy, think again
- Anomalous
- · Replies 34 ·
Graduate What happens when two black holes meet?
- ASKDodge
- · Replies 4 ·
Graduate Explaining Curved Space-Time to a Friend
- Mark_W_Ingalls
- · Replies 39 ·
Graduate Are Gravitational Waves Really Non-Existent? Examining the Evidence
- Garth
- · Replies 12 ·
Stargazing What Are the Theoretical Limits on Radio Telescope Size and Resolution?
- gonzo
- · Replies 2 ·
Graduate What does a neutron star look like
- gonzo
- · Replies 1 ·
Graduate Neutron Star Evolution and Possible Blackhole Formation in Proton Star Collapse
- Spin_Network
- · Replies 5 ·
Graduate How Does Quantum Chaos Theory Explain the Big Bang?
- Diesel
- · Replies 3 ·
Graduate Detect planets through mag field?
- japam
- · Replies 2 ·
Undergrad Could Cosmic Background Radiation Hold Clues About the Big Bang?
- BigMacnFries
- · Replies 3 ·
Graduate How Do Masers Explain the Process of Massive Star Formation?
- wolram
- · Replies 3 ·
Where have you travelled virtually in spacetime?
- Loren Booda
- · Replies 1 ·
Graduate Vela-X supernova and carbon dating?
- Andre
- · Replies 6 ·
Graduate Please give me some advise about DEC (dominant energy conditions)
- ylping
- · Replies 1 ·
Does Big Bang Theory Allow for God's Existence?
- Lisa!
- · Replies 16 ·
Graduate Does BH Mass Boundary Vary with Matter Type?
- wolram
- · Replies 5 ·
Graduate Quasars non cosmological red shift.
- wolram
- · Replies 1 ·
Graduate Eot-Wash sub-mm test inverse square law
- marcus
- · Replies 1 ·
Graduate New Take on SETI: Astro-ph/0506110
- marcus
- · Replies 2 ·