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 Solving the Energy Crisis on a Methane-Rich Planet
- marcus
- · Replies 5 ·
Graduate Is There a Significant Shift in the Triple-Alpha Process?
- Labguy
- · Replies 5 ·
Graduate Cosmological Principle: Finite or Finiteless Universe?
- touqra
- · Replies 4 ·
Undergrad Let's think crack u'r brain with this qn.
- gunblaze
- · Replies 1 ·
Undergrad Is the Andromeda Galaxy going to collide with the Milky Way?
- tony873004
- · Replies 9 ·
Graduate Could S Meson Explain Dark Matter?
- selfAdjoint
- · Replies 1 ·
High School Pluto's discovery and 75-year history
- Orion1
- · Replies 5 ·
Graduate Average luminosity of night sky vs frequency
- turbo
- · Replies 5 ·
High School How much radiation comes in contact with the martian surface?
- Imparcticle
- · Replies 2 ·
Graduate Pioneer anomaly and topological phase defects of light
- wolram
- · Replies 1 ·
Undergrad Is There Evidence of Life on Mars?
- Chronos
- · Replies 3 ·
Graduate Over density of galaxies at z=5.9
- wolram
- · Replies 18 ·
Graduate Traveling to different Universes?
- Silverbackman
- · Replies 2 ·
Graduate Why Does the Solar System's Angular Momentum Distribution Appear Anomalous?
- marley.wannabee
- · Replies 1 ·
Have Scientists Discovered the Smallest Exoplanet Yet?
- marlon
- · Replies 2 ·
Graduate What is the significance of being in the eigenspace of Christ?
- arildno
- · Replies 8 ·
Habitable Star Systems: Where Can We Find Maggie Turnbull's Catalogue?
- Mean-Hippy
- · Replies 1 ·
Undergrad Temperature calculation for planet orbiting CHARA at 1 AU
- Mean-Hippy
- · Replies 7 ·
Graduate A Universe That Is More Life-Producing?
- Gold Barz
- · Replies 16 ·
Twisted Meteor Train - A Sight to Behold
- meteor
- · Replies 1 ·
Undergrad Finding a Formula for Determining G Forces in Space Travel
- freespace2dotcom
- · Replies 12 ·
Graduate Can We Talk of Points of Space?
- misster y
- · Replies 10 ·
High School Finding Solar Path Data - Resources for Sun Position in Sky
- ALime88
- · Replies 2 ·
Galaxy was headed at us at like 100 times faster than a bullet
- Daark Nova
- · Replies 14 ·
Graduate What is M theory and how does it relate to string theory?
- Kakorot
- · Replies 3 ·
High School How Can Light Exist When Time is Stopped?
- spooky
- · Replies 5 ·
Graduate Does an infinite universe always repeat its parts?
- Loren Booda
- · Replies 15 ·
Graduate Infinite Universe Energy: CMBR Impact?
- gonzo
- · Replies 1 ·
Graduate Baryonic mass figures from the Galaxy Red Shift Survey
- wolram
- · Replies 7 ·
Is Sending Machines into Deep Space a Wise Decision for Humanity's Future?
- Daark Nova
- · Replies 12 ·
Is an Astronomy Degree Practical?
- stjimmy
- · Replies 10 ·
Is NASA Replacing Columbia with a New Shuttle?
- Moneer81
- · Replies 10 ·
Undergrad How Is Dark Matter So Hot Yet Invisible?
- Mean-Hippy
- · Replies 10 ·
Graduate Which theory best explains the origin of matter in the universe?
- MrBlonde
- · Replies 7 ·
Graduate GoldBarz asks: wd laws work in different dimens. universe?
- marcus
- · Replies 5 ·
Graduate How can atoms exist in a black hole's singularity if they can't be compressed?
- Undomiel
- · Replies 11 ·
Undergrad The Big Splat: Origin of Our Moon
- chronon
- · Replies 3 ·
Graduate Why do stars have an upper mass limit around 150-200 solar masses?
- marcus
- · Replies 3 ·
High School How do you calculate the sun's angle from an object's shadow?
- Ba
- · Replies 7 ·
Graduate Is Science Fiction a Legitimate Source of Scientific Ideas?
- Ivan Seeking
- · Replies 8 ·
Graduate Find the universe point of origin based on location of cellestrella bodies?
- whatzzupboy
- · Replies 4 ·
Graduate How do physicists know the universe is mostly normal matter not antimatter?
- Icebreaker
- · Replies 8 ·
State Your Opinion on String Theory
- Daark Nova
- · Replies 5 ·
Graduate Hubbles's law and the Dark Energy Component
- Lacy33
- · Replies 4 ·
Undergrad Scientists see high likelihood of ET visitors
- Ivan Seeking
- · Replies 22 ·
Graduate Solar super-sail could reach Mars in a month
- Ivan Seeking
- · Replies 9 ·
Graduate The predictions it makes don't agree with reality. Enough said
- Tapsnap
- · Replies 3 ·
High School How was all the universe's matter compressed in the big bang?
- Daark Nova
- · Replies 10 ·
Graduate Do branes colliding create universes?
- Gold Barz
- · Replies 8 ·
Graduate Does Cosmology Need Radical Ideas Like Transforming Dark Matter and Dark Energy?
- marcus
- · Replies 1 ·
Graduate Life Improbable In 4D+ Universes
- Gold Barz
- · Replies 11 ·
Graduate Could a Closed Universe Reverse Time During Collapse?
- Rasine
- · Replies 2 ·
Graduate In The Future Beyond The Dark Era
- Gold Barz
- · Replies 4 ·
Graduate Do buoyancy and density cancel in a black hole?
- Ryan H
- · Replies 7 ·
Graduate Could polarization errors in IMAP data invalidate dark matter and dark energy theory?
- Louis Cypher
- · Replies 2 ·
Graduate Do CMB perturbations correspond to large-scale structure in the Sloan Survey?
- saltydog
- · Replies 7 ·
Undergrad What are the smallest orbital masses that can exist in space?
- Glenn
- · Replies 16 ·
Graduate What is the nature of baryonic dark matter in Galactic Blobs?
- Garth
- · Replies 13 ·
Undergrad Question regarding Supernova SN1987
- Oblivion
- · Replies 4 ·
Undergrad Was the sun ever a blue star in the early stages of its life?
- Bladibla
- · Replies 17 ·
Undergrad Delta v needed to move Hubble closer to the ISS
- marrsc
- · Replies 9 ·
Graduate What tests would select between competing cosmological theories?
- wolram
- · Replies 3 ·
Undergrad The largest explosion ever seen in space
- Chronos
- · Replies 8 ·
Graduate Spacetime interval formula - what's the d?
- NanakiXIII
- · Replies 8 ·
Graduate Supergalactic node locations in ecliptic coordinates
- Graham Fox
- · Replies 7 ·
High School Is Moisture Harmful to Telescope Lenses in Cold Weather?
- redrum781
- · Replies 2 ·
Undergrad Did time exist before the Big Bang?
- sero
- · Replies 28 ·
Graduate Couldn't the end of spacetime cause spacetime?
- J_desu101
- · Replies 12 ·
Graduate Can matter escape from the universe?
- Ivan Seeking
- · Replies 11 ·
Undergrad Long Lost Star Catalog Found in Plain Sight
- Ivan Seeking
- · Replies 2 ·
Has the Tsunami Changed Our Pole Star?
- vinee
- · Replies 2 ·
Graduate What are the giant infrared blobs detected by Spitzer?
- Garth
- · Replies 39 ·
Graduate Is dark energy needed in a perturbed universe.
- wolram
- · Replies 7 ·
Graduate What Causes the Bright Streaks on Saturn's Moon Titan?
- Phobos
- · Replies 9 ·
Graduate Is the Universe Losing Mass Due to Heat Loss and Dark Energy Expansion?
- Les Sleeth
- · Replies 17 ·
Hubble fix-up funds cut (MSN 21 Jan)
- marcus
- · Replies 9 ·
Will the Huygens probe land successfully on Titan?
- DaveC426913
- · Replies 73 ·
High School Velocity of a galaxy, is it the rotating speed around itself?
- A_I_
- · Replies 1 ·
High School What Causes Earth's Tilt on Its Axis?
- jjjsarnis
- · Replies 4 ·
Graduate What is the Mass-Luminosity Relationship for Stars?
- abyssoft
- · Replies 1 ·
Graduate Why isn't all matter concentrated at the Big Bang's center if it spread outward?
- Mr_Euchre
- · Replies 6 ·
Undergrad Where are the solar systems like our own?
- timken
- · Replies 5 ·
Graduate Antimatter in Space: How Could It Exist?
- z-component
- · Replies 2 ·
Undergrad Are Cosmic Rays Particles or Waves?
- Glenn
- · Replies 12 ·
Stargazing APS neutrino astrophysics and cosmology working group report
- Chronos
- · Replies 1 ·
Graduate What Are the Radiation Levels Inside and Outside Earth's Belts?
- reaper
- · Replies 13 ·
High School How does the expansion of space work if not like an explosion?
- woz
- · Replies 6 ·
The Unending Universe: What Comes Next?
- tph666
- · Replies 1 ·
Graduate Bekenstein's rival to Dark Matter
- marcus
- · Replies 9 ·
Have you seen new images of Titan?
- somy
- · Replies 3 ·
Undergrad Should we create an artificial frictional medium like an atmosphere?
- EngTechno
- · Replies 2 ·
Undergrad Measuring the rotation speed of Io
- Link
- · Replies 5 ·
Graduate Calculating E or M from a State Vector
- kepler
- · Replies 18 ·
Undergrad Doppler effect and color of stars
- nseth1
- · Replies 10 ·
Graduate Average distance to nearest star in line of sight
- homology
- · Replies 5 ·
High School Deep Impact: NASA's Mission to Smash a Comet on the Fourth of July
- Orion1
- · Replies 1 ·
High School Can astronauts see colors in space without Earth's atmosphere?
- Kerrie
- · Replies 15 ·
Successful launch of Deep Impact
- Phobos
- · Replies 4 ·
Graduate Can topology determine whether the universe is spatially finite or infinite?
- ryokan
- · Replies 12 ·
Graduate Can atoms in a black hole move if they're compressed?
- UrbanXrisis
- · Replies 13 ·