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 Is the Universe Fine-Tuned for Androids?
- marcus
- · Replies 10 ·
Graduate A hypothetical and impossible solution to the origin of the Universe.
- Pattonias
- · Replies 11 ·
High School How have we photographed the Milky Way from inside it?
- jobyts
- · Replies 35 ·
Graduate Potential valleys in our solar system
- dianaj
- · Replies 2 ·
High School Difference between astronomy and cosmology
- pixel01
- · Replies 4 ·
Undergrad Is our Solar System a large Atom?
- Abstruce
- · Replies 10 ·
High School Double Crater on Google Mars: 19°53'15.38"N 141°40'48.73"E
- scupydog
- · Replies 1 ·
Graduate Where Can I Find Mass Profiles of Galaxy Clusters for Gravity Research?
- Mosis
- · Replies 1 ·
Undergrad Why Can't We See a Parallel Universe?
- Cr0m
- · Replies 3 ·
Astronomical discoveries initially rejected or attacked
- owenhbrown
- · Replies 15 ·
High School What Are Some Quick Science Fair Ideas Related to Math and Astronomy?
- Astronomer@14
- · Replies 8 ·
Graduate How would a solid sphere respond to gravitational waves?
- Ranku
- · Replies 12 ·
Graduate The Hubble Constant and Natural Unit
- micomaco86572
- · Replies 8 ·
Graduate Dark energy from QCD in the Urban-Zhitnitsky model
- BDOA
- · Replies 1 ·
Graduate Why Are There Disconnected Universes?
- hadeka
- · Replies 10 ·
High School What is at the center of our galaxy?
- doc.madani
- · Replies 25 ·
Graduate Does flat Universe have a center?
- S.Vasojevic
- · Replies 3 ·
Graduate Second law of thermodynamics and black holes ?
- HossamCFD
- · Replies 3 ·
NASA and ISRO confirm water on the moon
- bebe7
- · Replies 6 ·
Graduate Neutron star collapse can produce GBBs?
- magnetar
- · Replies 4 ·
Undergrad Is There Ice on Mars? New Evidence from Fresh Meteorite Craters
- marcus
- · Replies 2 ·
High School If all the empty space of atoms were removed, how big would this earth be?
- sskkambad
- · Replies 3 ·
Stargazing Can I see anything other than the planets with a 4 telescope?
- Wattever
- · Replies 12 ·
Graduate Do wormholes actually exist and can they be used for time travel?
- doc.madani
- · Replies 1 ·
Undergrad Water discovered on the lunar surface by infrared spectroscopy
- Monocerotis
- · Replies 6 ·
High School Stars eventually die because they use up their fuel right?
- Boogeyman
- · Replies 4 ·
Graduate Difference between Dark Energy and Cosmological Constant
- bombadil
- · Replies 6 ·
Graduate Black hole merger - what would happen if
- WACG
- · Replies 2 ·
Undergrad Is Time Synchronous Throughout the Universe?
- justwondering
- · Replies 8 ·
Graduate Theoretical Application For Acceleration In Space
- Cosmicon
- · Replies 10 ·
High School Is Planet X Real and Could It Impact Earth?
- {MXC}michael
- · Replies 1 ·
Undergrad Star Catalogs within 200 LY of Earth - Needed in Table Format
- Insanity
- · Replies 6 ·
Graduate Is a Core Temperature of 3.14*(10^7) K Feasible for a 50 Solar Mass Star?
- maggiemicmuc
- · Replies 1 ·
Undergrad Why does Saturn's dust form a flat ring and not a sphere around it?
- kaleidoscope
- · Replies 2 ·
Undergrad Which statement is true about Redshift and the Hubble constant?
- through.time
- · Replies 7 ·
What is new with SETI?
- Rick Rabia
- · Replies 9 ·
Graduate How does inflation fit into the position of the Earth?
- tampora
- · Replies 1 ·
Graduate Could a Milky Way-sized universe be only a month old?
- Freeman Dyson
- · Replies 14 ·
Does Google Earth's sky view show the actual stars above my location?
- budd
- · Replies 2 ·
Undergrad Why isn't dark matter just unseen planets around stars?
- AdkinsJr
- · Replies 6 ·
Could a star have giant rings like Saturn?
- ajm133
- · Replies 6 ·
Graduate Spinning and rotation of planets
- wilsonlye
- · Replies 2 ·
Graduate Distant Galaxies - observation methods
- Adrastea
- · Replies 3 ·
Graduate The Mechanism of the Cosmological Redshift
- nutgeb
- · Replies 29 ·
Graduate History and geometry of flat universe
- Ranku
- · Replies 10 ·
Stargazing Which Telescope Should I Buy for Under $200?
- CINA
- · Replies 10 ·
Graduate Is a change in gravity felt instantaneously on the other side of the universe?
- Axuality
- · Replies 3 ·
Undergrad Is Redshift Possible in a Stationary Universe?
- pulsexx
- · Replies 1 ·
Graduate Can the expansion of the universe be observed even though we are a part of it?
- srijithju
- · Replies 27 ·
Graduate What are the preliminary results from the Planck First Light Survey?
- Chalnoth
- · Replies 3 ·
Undergrad How Does Gravitational Force Influence Ocean Tides?
- Frank66
- · Replies 3 ·
Graduate Offshoot from 'Theoretically how far can one see in the universe'
- Rymer
- · Replies 41 ·
Stargazing What is the Wells cycle and how long does it last?
- Helios
- · Replies 3 ·
Graduate What are the key theories used to predict galaxy rotation curves?
- Hepth
- · Replies 10 ·
Graduate Can math truly describe our universe and it's phsical being?
- liquidanubis3
- · Replies 10 ·
Undergrad How do we determinate the mass of stars
- Bjarne
- · Replies 7 ·
Graduate Chaotic Eternal Inflation vs. False Vacuum Eternal Inflation
- edgepflow
- · Replies 1 ·
High School What exactly does radio luminosity mean?
- paperstars
- · Replies 1 ·
Undergrad What is the most massive galaxy cluster in the universe?
- Loren Booda
- · Replies 7 ·
Undergrad Is or can gravitational force become cumulative?
- docpeter1953
- · Replies 5 ·
Graduate More Hawking radiation misinformation
- jnorman
- · Replies 6 ·
High School Moon's path/orbit - is it changing?
- fawk3s
- · Replies 4 ·
Undergrad Other planets interaction on Earth-Moon System
- moon_sphinx
- · Replies 4 ·
Is the Surface Gravity of Mu Arae-c Miscalculated?
- Researcher X
- · Replies 2 ·
Undergrad Why is iron the heaviest element formed in stellar cores?
- dangerbird
- · Replies 37 ·
Graduate What Do I Observe Moving Around in Curved Space
- solarblast
- · Replies 3 ·
High School Is Our View of Stars Really a Glimpse Into the Distant Past?
- t_n_p
- · Replies 7 ·
New high-definition images from Hubble Space Telescope
- joono
- · Replies 9 ·
Graduate Is the Idea of the Big Bang as the Beginning of the Universe Outdated?
- madness
- · Replies 13 ·
Graduate How Do Radio Astronomical Measurements Convert to Temperature (Kelvin)?
- Martin1957
- · Replies 1 ·
High School How often does the Moon occult Regulus?
- Maria76
- · Replies 8 ·
Stargazing A new telescope can detect a candle across the Atlantic
- map19
- · Replies 4 ·
Graduate String theory and gravitational waves imprint on microwave background
- ensabah6
- · Replies 4 ·
Graduate How does cosmic microwave radiation lose energy?
- Naty1
- · Replies 23 ·
Graduate Calculating Planet Deceleration Due to Decreased Gravity
- Bjarne
- · Replies 7 ·
Graduate Black holes and theories of gravity
- robheus
- · Replies 3 ·
Graduate A challenge to the symmetry of laws of physics
- WaveJumper
- · Replies 1 ·
Graduate In currently understood physics, does the universe have a centre?
- DaveC426913
- · Replies 22 ·
High School Did You See the Mason Dixon Meteor Streak Across Maryland and Pennsylvania?
- mikesastro
- · Replies 1 ·
Undergrad A little thought of before the Big Bang
- DJBracks
- · Replies 52 ·
Graduate The expanding universe isn't in our neighborhood
- bwana
- · Replies 3 ·
Graduate Question on neutrino emission machanism in neutron star
- TuGmOS
- · Replies 2 ·
Undergrad Why did light from distant galaxies take 13 billion years to reach us?
- Heuristix
- · Replies 1 ·
Undergrad Japan building space-based power plant
- Mk
- · Replies 21 ·
Graduate Expansion around gravitational clusters
- Riffraff
- · Replies 2 ·
High School Planetary Orbits: Decay or Spiral?
- gloo
- · Replies 3 ·
Undergrad Evolution of Our Sun's Rotation: From 4.5 Billion Years Ago to Present Day
- Bjarne
- · Replies 3 ·
Undergrad Question of Galactic Proportions
- ranrod
- · Replies 4 ·
Graduate CMB fluctuations and large scale fluctuations nowadays do not match ?
- smallphi
- · Replies 4 ·
Graduate The limit of Ultramassive Black Holes.
- Researcher X
- · Replies 3 ·
Undergrad Can Black Holes Be Used for Space Travel and How Do They Compare to Wormholes?
- redhedkangaro
- · Replies 6 ·
High School Galaxies that can be seen with the naked eye
- Count Iblis
- · Replies 16 ·
Undergrad What is dark matter and how was it formed?
- Baboon
- · Replies 33 ·
Undergrad If a comet kicks the moon out of its orbit and away from earth
- redphoton
- · Replies 4 ·
Advanced Astronomy/Cosmology Forum - Get Answers to Your Questions
- smallphi
- · Replies 3 ·
Undergrad Do gravity assist manoeuvres add velocity per second or average acceleration?
- Bjarne
- · Replies 9 ·
Graduate Intuitive explanation of the gravity of a sphere
- jacobfreeze
- · Replies 8 ·
Graduate Angle of the Sun above orbit plane on satellite-centered celestial sphere
- gnurf
- · Replies 4 ·
Magnetic Field of the Sun will Flip
- Philosophaie
- · Replies 8 ·
Graduate Do black holes repel the weak force?
- dhouser
- · Replies 1 ·