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
Undergrad Is Mounting a Telescope on the ISS a Viable Option for Atmospheric-Less Viewing?
- Phobos
- · Replies 2 ·
Graduate Mature stars in ancient galaxies
- turbo
- · Replies 42 ·
High School Why Do Planets Rotate on Their Axis?
- Caesar_Rahil
- · Replies 3 ·
High School What are neutron stars?
- BigBang
- · Replies 32 ·
Undergrad Is there a super-massive black hole in the center of our galaxy?
- Echo 6 Sierra
- · Replies 7 ·
Graduate On the large-angle anomalies of the microwave sky
- marcus
- · Replies 21 ·
Graduate Orbit smulation and speed of gravitation
- serge
- · Replies 3 ·
Graduate Do White Holes Really Exist and What Are Their Properties?
- paul_abbotts
- · Replies 8 ·
Undergrad What is the Chandrasekhar limit and how is it calculated?
- aniket
- · Replies 16 ·
Undergrad How closely could the Moon orbit the Earth
- ohwilleke
- · Replies 17 ·
Undergrad Free graphing software for polar coordinates
- HiPPiE
- · Replies 6 ·
Graduate Will galaxies continue to form, or has galactic creation ended?
- Spin_Network
- · Replies 15 ·
High School How Our Place in the Galaxy Affects Life on Earth
- Bobby R
- · Replies 5 ·
Undergrad When might humanity reach Type II and III civilizations?
- Whitestar
- · Replies 48 ·
Graduate Who was John Bahcall and what impact did he have on the astrophysics community?
- SpaceTiger
- · Replies 7 ·
High School Philosophy in The Elegant Universe
- Jeremy
- · Replies 6 ·
Graduate How did matter reach us before light from the Big Bang?
- Crumbles
- · Replies 20 ·
High School Viewing galaxies and nebulae from Florida with $800-900 budget
- Cladson
- · Replies 3 ·
Is there a dominant colour in our universe?
- wolram
- · Replies 9 ·
Graduate Do universes reproduce through black holes and produce conditions for life?
- kjknohw
- · Replies 4 ·
Graduate Dark Matter CEUs: Katherine Freese's State of the Union Address
- Chronos
- · Replies 3 ·
Stargazing 114mm reflector photograph of Venus transit from Swansea, 2004
- zanazzi78
- · Replies 7 ·
Converting Gaseous Planets Into Matter
- Whitestar
- · Replies 9 ·
High School Question: Mnemonic for classes of stars
- Artermis
- · Replies 5 ·
Graduate What is the White Hole Model of the Universe?
- wolram
- · Replies 6 ·
Graduate Is Light's Terminal Velocity 300,000 km/s?
- questionauthority
- · Replies 5 ·
Graduate Lee Smolin's fecund universes hypothesis
- turbo
- · Replies 10 ·
Is the Milky Way Actually a Barred Spiral?
- cscott
- · Replies 4 ·
Graduate Is the overall charge of the universe positive, negative, or neutral?
- darkar
- · Replies 6 ·
Graduate GRB 8 billion light-years away: how did it form a new galaxy?
- Diesel
- · Replies 24 ·
Graduate Could Other Universes Exist in a Multiverse?
- Critical_Pedagogy
- · Replies 11 ·
Graduate Does the 3-body problem have stable solutions?
- kjknohw
- · Replies 2 ·
High School Water ice in crater at Martian north pole
- GOD__AM
- · Replies 1 ·
High School What is the field of view of the Hubble Telescope's planetary camera?
- big man
- · Replies 4 ·
Stargazing Meade 2114 AltAz telescope not showing planets despite autostar finding them
- Cladson
- · Replies 7 ·
Graduate 10th Planet resonance with Neptune
- tony873004
- · Replies 3 ·
Where's SpaceTiger? Summer Vacation Update
- tony873004
- · Replies 6 ·
Graduate What is shot noise and how is it estimated in galaxy surveys?
- cosmo_boy
- · Replies 1 ·
High School Three dimension space and one dimension time means
- Caesar_Rahil
- · Replies 4 ·
Perseids a wash-out here :grumpy:
- turbo
- · Replies 6 ·
High School The path of our planetary bodies
- misskitty
- · Replies 25 ·
Graduate Why do rocket engines at perihelion give the greatest velocity gain?
- rieman zeta
- · Replies 7 ·
High School What is the fundamental reason for the elliptical shape of orbits?
- cj
- · Replies 27 ·
High School Why Do Planets Rotate Around the Sun Without Crashing?
- Nocturn888
- · Replies 6 ·
Undergrad Law of Two Bodies: Smaller Body Breaks Up
- sahd0w
- · Replies 3 ·
High School New dwarf planet discovered beyond Neptune
- ohwilleke
- · Replies 21 ·
Stargazing Meade 2114 ATTS autostar alignment not working correctly
- Cladson
- · Replies 1 ·
Recent photographs or data of Mars's moons
- Daminc
- · Replies 3 ·
Which astrophysical journal is the best?
- yu_wing_sin
- · Replies 3 ·
Stargazing Buying a New Telescope and would like some input.
- whatzzupboy
- · Replies 4 ·
Online petition to continue Voyager and Hubble programs
- Phobos
- · Replies 6 ·
Planetary Alignment on my Date of Birth
- porselin13
- · Replies 10 ·
Does evil help the universe get better?
- lockecole
- · Replies 3 ·
Graduate Big Bang Implosion: The Symmetry of Cosmic Expansion and Collapse
- Loren Booda
- · Replies 3 ·
Graduate Logic, Metaphysics, and the Idea of an Expanding Universe
- quantumdude
- · Replies 7 ·
Graduate The fine tuning problem (all 120 OOM of it)
- Nereid
- · Replies 6 ·
Could Self-Replicating Probes Revolutionize Interstellar Exploration?
- Gold Barz
- · Replies 28 ·
Graduate Dear Phobos, Janus, and Self Adjoint
- turbo
- · Replies 5 ·
High School Can We Really Look Back in Time?
- entropy+time=fun
- · Replies 10 ·
Undergrad How did the Michelson-Morley experiment show that light speed is constant?
- questionauthority
- · Replies 1 ·
Graduate Mass not intrinsic, but emergent.
- turbo
- · Replies 14 ·
Stargazing Can the Arecibo Radio Telescope Eavesdrop on the Entire Galaxy?
- Gold Barz
- · Replies 9 ·
Graduate Can You Imagine a Universe Without Space and Time?
- Curious6
- · Replies 64 ·
Graduate Can No Movement FTL Travel Revolutionize Space Travel?
- AP
- · Replies 3 ·
Undergrad Can one black hole consume another black hole?
- bayan
- · Replies 9 ·
Graduate Is the Universe an Infinite Regression of Black Holes?
- Ulnarian
- · Replies 10 ·
Graduate How Do Stellar Winds Impact the Elemental Composition of Planets?
- Ratzinger
- · Replies 9 ·
Graduate Dark matters seems unlikely to succeed
- yu_wing_sin
- · Replies 32 ·
Undergrad How Old Are Third Generation Stars
- Gold Barz
- · Replies 1 ·
Graduate Is Dark Matter a Macroscopic Manifestation of Quantum Hidden Variables?
- Spin_Network
- · Replies 4 ·
Graduate Is Centripetal Acceleration Relevant in Curved Space-Time?
- andrewcheong
- · Replies 7 ·
High School Meaning of Planet? Just 8 planets?
- woz
- · Replies 5 ·
Undergrad Uneven Cratering of Moon's Surface
- cj
- · Replies 2 ·
Stargazing Views on schimdt Cassegrain telescopes
- Cyclotron
- · Replies 11 ·
Undergrad Cosmology Simulations' softwares
- MathematicalPhysicist
- · Replies 7 ·
Graduate Are Intermediate Mass Black Holes from Population III Stars?
- wolram
- · Replies 1 ·
Graduate Pulsars with irregular periodicity radiation
- MathematicalPhysicist
- · Replies 16 ·
Undergrad First extrasolar planet found in triple-star system HD 188753
- Astronuc
- · Replies 20 ·
Graduate How would a gyroscopic space-drive work?
- KonradKorzenowski
- · Replies 14 ·
Graduate Universal Expansion: Faster Than Light?
- CBJammin103
- · Replies 3 ·
Colonization Of The Milky Way Inevitable
- Gold Barz
- · Replies 17 ·
A small test for your astronomic study IQ
- yu_wing_sin
- · Replies 1 ·
Graduate Did time and space exist before the Big Bang?
- Rake
- · Replies 6 ·
Graduate Is 10K Resolution Possible for Faster-Than-Light Transmissions?
- Gold Barz
- · Replies 40 ·
Kennedy Space Center Hours?
- Mk
- · Replies 15 ·
Graduate Are Wormholes Possible? How Far From a Possibility Are They?
- vincentm
- · Replies 13 ·
Is Teleportation Really Possible?
- Gold Barz
- · Replies 31 ·
Graduate Why does gravity play a role in the energy of the universe?
- Lacy33
- · Replies 3 ·
Can we ever see Mars as large as the full moon from Earth?
- photon
- · Replies 6 ·
High School The relation between the bermuda triangle and black holes
- Sabine
- · Replies 6 ·
Graduate Polarization of quasar emissions
- turbo
- · Replies 5 ·
Stargazing A telescope orbiting an outer planet?
- Felix83
- · Replies 10 ·
Graduate Comparison of the Mainstream and the Self Creation Freely Coasting models
- Garth
- · Replies 67 ·
Undergrad Does Space Have Mass to Support Swirling Galaxies?
- Pocketwatch
- · Replies 6 ·
Graduate Nucleosynthesis of PopIII Core Collapse Supernovae
- wolram
- · Replies 4 ·
Graduate Neutrino scalar waves travel back and forwards in time
- Lisa!
- · Replies 19 ·
Graduate Do scientists think black holes have singularities
- wolram
- · Replies 18 ·
High School Can a Black Hole create Supernova?
- ludi_srbin
- · Replies 17 ·
Graduate Where Do Black Hole Singularities Send All the Matter They Consume?
- aricho
- · Replies 13 ·
Graduate Where has all the information gone
- wolram
- · Replies 1 ·