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 Hubble's law and the age of the universe
- Orcinus
- · Replies 6 ·
Undergrad Where do the heaviest elements come from?
- aaricia
- · Replies 7 ·
Undergrad How can the universe be moving faster?
- cosmicrock
- · Replies 2 ·
Graduate Fundamental Existence Of Matter/Energy
- abhiroop_k
- · Replies 16 ·
Undergrad Cosmological models and begining and ending of universe
- Mahira414
- · Replies 2 ·
Peer-reviewed case study of how an ideal universe would work
- Ryan_m_b
- · Replies 10 ·
Undergrad Do Black Holes Work Like a Sucked-Out Fire?
- 98operate
- · Replies 2 ·
Undergrad Can the merging of white dwarfs explain Type Ia supernovae explosions?
- Straw_Cat
- · Replies 17 ·
Graduate Why are we so sure the universe existed in a point 13.7 billion years ago?
- PhyPsy
- · Replies 7 ·
Undergrad Relating Newton's universal law of gravitation with Kepler's 3rd law
- Rumor
- · Replies 1 ·
Undergrad Effect of Telescope Aperture Size on Spectrometer Resolution
- Drakkith
- · Replies 2 ·
Graduate Non-expanding solution to redshift observations
- Dustin Maki
- · Replies 10 ·
Graduate Are there any habitable binary star systems in the Kepler catalog?
- Basilisk
- · Replies 3 ·
Undergrad What is the Correct Calculation for the Pressure at the Center of a Planet?
- Bill Wells
- · Replies 7 ·
High School What is the easiest way to start college in Physics, Astrophysics, or Astronomy?
- djc17231
- · Replies 2 ·
Undergrad Could Redshift not result from the Doppler effect?
- lockEF
- · Replies 27 ·
Graduate Is there a problem in assuming the universe has a boundary?
- id10tothe9
- · Replies 42 ·
Graduate Does universal expansion increase Earth's distance from the moon?
- Sagar_C
- · Replies 19 ·
Graduate Is universe a 3 dimensional fractal .?
- dexterdev
- · Replies 4 ·
Graduate How Much Man-Made Junk is on the Moon After 43 Years and Counting?
- EmilyHopkins
- · Replies 10 ·
Graduate Keep track of cosmos by size or by elapsed time? Your preference?
- marcus
- · Replies 11 ·
Graduate Age of the universe in earth's reference frame?
- VantagePoint72
- · Replies 13 ·
Undergrad How does temperature change as you move away from the sun into space?
- fifa1022
- · Replies 2 ·
High School Short term atmospheric retention.
- KTevolved
- · Replies 1 ·
Graduate Struggling with imposter syndrome in astrophysics
- Conjoined
- · Replies 3 ·
High School What should I do to become an astrophysicist at 13 years old?
- astroboy12
- · Replies 11 ·
Undergrad The Cause of Earth's Rotation: Faradey's Motor or Something Else?
- Chemist@
- · Replies 2 ·
Graduate NASA's new WISE Survey Results (and dark matter)
- d3mm
- · Replies 2 ·
High School Why Do Star Trails Appear Denser on One Side of the National Geographic Photo?
- kuahji
- · Replies 2 ·
Graduate What proof is there that time started at the moment of the big bang
- DeepSpace9
- · Replies 21 ·
Graduate If space is flat, why is space-time curved?
- geordief
- · Replies 27 ·
Undergrad Could bacteria from Mars have reached Earth via asteroid impacts?
- DeepSpace9
- · Replies 25 ·
Graduate Plate tectonics on exoplanets/moon.
- KTevolved
- · Replies 1 ·
Undergrad Atmospheric Density Profiles of Europa and Mars
- mightymouz02
- · Replies 1 ·
Undergrad Martian core composition and volcanic activity
- willstaruss22
- · Replies 8 ·
Undergrad After the Big bang ,when did the first atoms form?
- Monsterboy
- · Replies 4 ·
Graduate Are Supersymmetric Inflation Models Still Viable After LHC's Latest Results?
- Iheartscience
- · Replies 2 ·
Graduate Does the big bang theory conflict with the law of conservation?
- Tim13
- · Replies 10 ·
Graduate Measuring the size of the observable universe
- g.lemaitre
- · Replies 1 ·
Graduate F(R) gravity with non-minimal carvature-matter coupling
- thecoop
- · Replies 2 ·
Undergrad Escape velocity in the atmosphere
- willstaruss22
- · Replies 13 ·
Graduate Where is an early galaxy now, 10 billion years after Hubble observed it?
- PhanthomJay
- · Replies 6 ·
Graduate Could universe collisions create chain reactions and matter transfer?
- KTevolved
- · Replies 5 ·
Undergrad Where Does Energy Originate?
- Hypo
- · Replies 169 ·
Graduate Type Ia supernovae and the value of H_0 from distance calibration
- Chronos
- · Replies 3 ·
High School Is Earth's Thin Atmosphere Caused by the Moon?
- willstaruss22
- · Replies 1 ·
Graduate How Do Two Doubling Times Shape the Standard Cosmic Model?
- marcus
- · Replies 11 ·
Graduate Dark Matter and Eternal Inflation
- Ryankffx
- · Replies 13 ·
Graduate Can Quantum Mechanics Explain Multiple Universes in the CMB Map?
- bigmig
- · Replies 7 ·
Graduate Big Bang modeled as a phase-change
- jackmell
- · Replies 15 ·
Undergrad The Sun is very spherical - allegedly
- sophiecentaur
- · Replies 24 ·
Graduate Heliophysics: the last ten years and the next ten years agenda
- Dotini
- · Replies 3 ·
Undergrad Ultra-high-energy cosmic ray ≠ collision of 2 'normal' rays?
- Michel_vdg
- · Replies 2 ·
Graduate Did the universe start as dimensionless and evolve through higher dimensions?
- Snip3r
- · Replies 8 ·
Graduate Why did we stop at 46.5 billion light years?
- thecow99
- · Replies 11 ·
High School How long will it take for the Earth to become tidally locked to the Moon?
- mofobro
- · Replies 2 ·
High School A trivial question but who can answer it ? (Friend from Algeria)
- benbr
- · Replies 23 ·
Graduate The Aftermath of a Large Comet Impact on Mars
- Straw_Cat
- · Replies 7 ·
Graduate Dark Matter in Galaxies/Star Clusters
- Rorkster2
- · Replies 3 ·
Graduate Power of inflation in relation to expansion
- fat f...
- · Replies 9 ·
Graduate How much energy is there in the Universe?
- Alutoe
- · Replies 9 ·
Graduate Light’s temperature and particle’s temperature from 3000K
- nonspace
- · Replies 6 ·
Graduate Could a Curved Boundary of Space-Time Explain Dark Energy?
- id10tothe9
- · Replies 4 ·
Undergrad Curious about the age of the Universe
- Muriel777
- · Replies 18 ·
Graduate Mass Absorption -V- Black Hole size
- Spice
- · Replies 2 ·
Undergrad Which planet in this solar system would be most appropriate to terraform?
- Gliese123
- · Replies 62 ·
Undergrad Orbital slingshot energy - energy from gravity?
- r3born
- · Replies 4 ·
Undergrad Do Heavy Elements Come Only from Supernovae?
- ImaLooser
- · Replies 7 ·
Curiosity rover landing on Mars
- Drakkith
- · Replies 20 ·
Undergrad Does Hubble's law cause Earth-Moon separation?
- Michel_vdg
- · Replies 9 ·
Graduate Understanding Energy Density in Cosmology
- spriag
- · Replies 3 ·
Looking for source of cosmology/astrophysics quote
- Mondo11
- · Replies 5 ·
Graduate Copenhagen interpretation of Big Bang
- atrchi
- · Replies 8 ·
Graduate The nature of nothingness/space, and potential multiverse
- coktail
- · Replies 9 ·
Graduate Review of Evidence for Dark Matter
- marcus
- · Replies 5 ·
Graduate Could dark energy be gravitational potential energy?
- johne1618
- · Replies 4 ·
Undergrad How do astronomers measure distances to objects 1 billion light years away?
- buzzdiamond
- · Replies 25 ·
Graduate Necessary and sufficient conditions for matter clumping into heavenly bodies?
- ImaLooser
- · Replies 2 ·
Graduate Too fast for a black hole to consume?
- Boliver
- · Replies 4 ·
Graduate Correcting for reddening in a color-color diagram
- tyskstil
- · Replies 1 ·
Graduate Could Dark Matter Explain the Mystery of Shear Viscosity in Neutron Stars?
- ImaLooser
- · Replies 6 ·
Graduate Could an orbital detector array magnify images of distant stars to detect planets?
- hubble_bubble
- · Replies 7 ·
Graduate What is the cosmic microwave background radiation and where did it come from?
- THE 1
- · Replies 23 ·
Graduate Quantum tunneling and the universe
- Rational T
- · Replies 74 ·
Graduate Why Does Dark Matter Appear Scale Variant in Galactic Rotation?
- StationZero
- · Replies 4 ·
Graduate Gravitational field strength for irregular object
- donaldosaurus
- · Replies 3 ·
Graduate Will the expanding universe really end up cold and empty?
- QuantumHop
- · Replies 12 ·
Undergrad What Would Happen if Our Moon Had a Moon?
- lxXTaCoXxl
- · Replies 6 ·
Graduate Spatial dimensions inside a black hole
- atrchi
- · Replies 6 ·
High School Why do different latitudes see different stars?
- buzzdiamond
- · Replies 10 ·
Graduate How is galaxy mass calculated using luminosity
- mesa
- · Replies 5 ·
Graduate Low Entropy big bang , models that explain it
- skydivephil
- · Replies 2 ·
Undergrad How does declination and right ascension relate to latitude / longetude?
- Sqw
- · Replies 4 ·
Graduate If the Earth were adrift in space, what would happen to its atmosphere?
- CCWilson
- · Replies 3 ·
Graduate Viscous fingering and structure of space
- andreas.zita
- · Replies 2 ·
Graduate Big Crunch to Big Bang: Is Our Universe Eternal?
- navilon
- · Replies 2 ·
Graduate Is there a maximum mass for a black hole?
- rogerperkins
- · Replies 94 ·
Graduate Black hole information loss and the holographic principle
- hubble_bubble
- · Replies 2 ·
High School Is the Earth Electrically Charged?
- ealbers
- · Replies 19 ·
Undergrad How do you relate space&time and matter&energy?
- Abidal Sala
- · Replies 1 ·