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 Why is it difficult to measure the perihelion advance of the planet Venus? Help
- kiwikiwi79
- · Replies 7 ·
Graduate Are Magnetic Anomalies the Cause of Black Hole Eruptions?
- wolram
- · Replies 5 ·
Graduate The Hubble Length and Mass of the Universe
- Ian
- · Replies 21 ·
Graduate Habitable Planets: Disaster Zones and Safe Havens
- Ivan Seeking
- · Replies 16 ·
Graduate Habitable Worlds circling non-Sol like stars
- The Rev
- · Replies 3 ·
Undergrad Moon Moving Away: Effects & Possibilities
- mee
- · Replies 1 ·
Graduate Disk Scale Length Help: Troubleshooting for Science Fair
- SplinterIon
- · Replies 3 ·
Stargazing Can You Find a Quality Telescope for Under $100?
- Someone502
- · Replies 5 ·
Undergrad Exo-Planets: 70% Eccentric Orbits - Does It Imply Rare Solar System?
- Gold Barz
- · Replies 2 ·
Graduate Another possible crisis for the standard cosmological model?
- Garth
- · Replies 6 ·
Graduate Neutron stars: good short article
- marcus
- · Replies 4 ·
Graduate Proving the Expansion of the Universe
- cosmoboy
- · Replies 12 ·
Graduate Magnetic fields and inter stella medium
- wolram
- · Replies 5 ·
Graduate Armchair Cosmology: Djorgovski & Williams Examine Virtual Observatories
- Chronos
- · Replies 2 ·
Graduate Measuring Venus Perihelion: Challenges & Solutions
- smokie
- · Replies 5 ·
Graduate Which Fundamental Force Drives Inflation?
- briandunning
- · Replies 6 ·
High School Solar Flares: Causes, Effects & Prevention
- Reshma
- · Replies 3 ·
Is Our Solar System Unique or Just Run of the Mill?
- Gold Barz
- · Replies 16 ·
Graduate Is There a Preferred Axis in the Cosmic Radiation Anisotropy?
- wolram
- · Replies 4 ·
Undergrad Interpreting Spectra for Jupiter's Rotational Speed
- Link
- · Replies 5 ·
Graduate Newton's Equation: Applying to Earth-Moon-Sun System
- ammann
- · Replies 4 ·
Undergrad Is Hawking Right About Black Holes Not Being Black?
- Aki
- · Replies 22 ·
Undergrad Is Space Time Only Relevant in Space?
- Prague
- · Replies 23 ·
High School What is the cutoff speed-of-sound for humans to distinguish direction in water?
- misskitty
- · Replies 70 ·
Graduate Why Do Hot Jupiters Exist and Not Other Planetary Configurations?
- marcus
- · Replies 12 ·
Graduate Can Mass Exist in a Singularity?
- bayan
- · Replies 49 ·
High School How does light interact with objects?
- Prague
- · Replies 20 ·
Graduate Question: How do universes reproduce and pass on their physical constants?
- Gold Barz
- · Replies 14 ·
Does Mars have it's own calendar yet?
- MonstersFromTheId
- · Replies 17 ·
Graduate Is the Friedmann Equation Failing at Late Times?
- wolram
- · Replies 3 ·
Graduate Are We Missing Earth-Like Planets Due to Orbital Orientation?
- Chris Russell
- · Replies 11 ·
Graduate First Stars - How big - Now Black Holes?
- Billy T
- · Replies 55 ·
Undergrad Understanding Gravitation: The Relationship Between Earth and Moon
- KingOfTwilight
- · Replies 3 ·
Graduate Is the Matter-Antimatter Imbalance in Our Universe Just a Simple Anomaly?
- brightstar2005
- · Replies 12 ·
Undergrad The most complex extraterrestrial molecule
- Loren Booda
- · Replies 1 ·
Graduate Expanding Universe: Is everything really getting bigger?
- oakstick
- · Replies 58 ·
Graduate Oort Cloud Treat to Interstellar Space Travel
- Chris Russell
- · Replies 3 ·
Graduate How to calculate age of universe with a certain redshift?
- detty_hk
- · Replies 16 ·
Graduate What If: Gravity Changed When Universe Laws Tweaked?
- Gold Barz
- · Replies 2 ·
Undergrad Astrophysics Scientific Research
- requiem
- · Replies 7 ·
Graduate Infinite-infinite universe explains all
- nameta9
- · Replies 42 ·
High School Electric Planet? Is It Possible?
- Gold Barz
- · Replies 3 ·
Graduate Can We Detect WIMPs and Axions on Earth?
- X-43D
- · Replies 4 ·
Graduate Is the Universe Inside a Giant Black Hole?
- Uno Lee
- · Replies 15 ·
High School Need Term for a Star and Its Associated Bodies
- Chris Russell
- · Replies 6 ·
Stargazing How to Design a Simple Telescope?
- Alawadhi
- · Replies 4 ·
Graduate New overview of cosmology for Ashtekar's book
- marcus
- · Replies 3 ·
High School Are Solar Systems Common in the Universe?
- Gold Barz
- · Replies 4 ·
Undergrad What Happens to Matter and Energy at the End of the Universe?
- misskitty
- · Replies 56 ·
Undergrad Atmospheric Pressure determined by?
- MonstersFromTheId
- · Replies 1 ·
Stargazing Building a DIY Radio Telescope: Worth the Time and Effort?
- relativelyslow
- · Replies 4 ·
High School The age of the universe: easy question - hard answer
- Ordep
- · Replies 69 ·
Undergrad What Are Common Misconceptions About the Big Bang?
- tribdog
- · Replies 14 ·
Reach the End of Universe: Is There a Wall?
- david90
- · Replies 30 ·
Undergrad What Is Needed To Make An Intelligent Species?
- Gold Barz
- · Replies 72 ·
High School Your Definition Of An Earth-Like Planet?
- Gold Barz
- · Replies 2 ·
Graduate Angular momentum of galaxy disks
- hellfire
- · Replies 4 ·
Undergrad Is There an Unknown Source of Energy Contributing to Our Universe's Expansion?
- brucephy
- · Replies 2 ·
Undergrad Would Different Laws Of Physics Affect Gravity?
- Gold Barz
- · Replies 11 ·
Graduate Dark Matter & Energy/Mass of False Vacuum
- Nacho
- · Replies 16 ·
Oh great, unmoderated alien communications
- Phobos
- · Replies 4 ·
Undergrad What is the comet's speed at its perihelion
- SABRINA
- · Replies 2 ·
Graduate Is the Vacuum the Same as Quantum Foam?
- Gold Barz
- · Replies 5 ·
Undergrad Explore the Mysteries of Neptune's Magnetic Field
- relativelyslow
- · Replies 10 ·
Graduate How do we apply the Friedman solution to a fluid with constant pressure and energy density?
- Rev Prez
- · Replies 7 ·
Undergrad Relation between Mass and distance between two objects
- shunya
- · Replies 6 ·
Undergrad Alternating planetary phase layers
- Loren Booda
- · Replies 2 ·
Stargazing Are There Internet Based Telescopes Available for Public Use?
- Link
- · Replies 5 ·
Is the 2nd Big Bang Theory Just Hype?
- Cosmo16
- · Replies 2 ·
Graduate How Does Dark Matter Avoid Gravitational Collapse?
- moving finger
- · Replies 2 ·
High School What Topics Can I Explore About Singularity for My Oral Presentation?
- bayan
- · Replies 4 ·
High School Astrophysics -What actually is this?
- !Live_4Ever!
- · Replies 7 ·
Graduate Measuring Io's Velocity Spectra: The Importance of Spectrometer Sensitivity
- Link
- · Replies 2 ·
High School The Impact of a Moonless Earth: Effects on Tides and Beyond
- stoned
- · Replies 6 ·
Undergrad Is a Subspace Sphere Around a Star Plausible in TNG Season 6?
- munky99999
- · Replies 1 ·
What are you doing in your parallel universes?
- SOS2008
- · Replies 19 ·
Space Love: A Comic for Astro Nerds!
- Andromeda321
- · Replies 1 ·
Graduate More exoplanet equation problems :/
- Dracovich
- · Replies 4 ·
Graduate Lab Fireball at RHIC May Have Black Hole Characteristics
- polyb
- · Replies 5 ·
High School Is it safe to assume that Earth-like planets are the best
- Gold Barz
- · Replies 9 ·
Has a Man-Made Black Hole Really Been Created?
- theCandyman
- · Replies 2 ·
Is NASA Shutting Down Long-Running Space Missions to Save Money?
- Phobos
- · Replies 11 ·
Graduate Fusion Reactor: A Possible Solution to Generate Thermal Energy?
- oldunion
- · Replies 6 ·
Graduate Thoughts on holographic universe and existence in general
- rody084
- · Replies 19 ·
High School Relative Planet Distances: Find Date/Start/Destination Distances
- iamsomeguy
- · Replies 7 ·
Graduate What's the difference between a two sphere and a three sphere?
- Baggio
- · Replies 1 ·
Graduate What is the theoretical limit on the mass of stars and has it been observed?
- marcus
- · Replies 14 ·
Graduate I saw an article in New Scientist re CBR
- Dayle Record
- · Replies 1 ·
Undergrad Is Life Common and Resilient in the Universe?
- Gold Barz
- · Replies 18 ·
Graduate What happens if you travel faster than the Speed of light
- 404
- · Replies 3 ·
Graduate What Happened Before the First Planck Time?
- scilover89
- · Replies 2 ·
Graduate Dark energy = dark matter*speed of light squared?
- <<<GUILLE>>>
- · Replies 14 ·
Graduate Is the Theory of Gravitational Waves Dead if Advanced LIGO Fails to Detect Them?
- X-43D
- · Replies 10 ·
High School Earth's Orbit: Why Is It Not Circular?
- brucephy
- · Replies 5 ·
Graduate Galaxies Accelerating at End of Universe: Big Bang Theory Wrong?
- zrower33
- · Replies 5 ·
Graduate Can we calculate the Schwarzschild radius of an object without knowing its mass?
- mrsmeath
- · Replies 5 ·
Graduate Which textbook is best for studying gravitation and cosmology?
- folksong
- · Replies 4 ·
Undergrad What happends to light before it reaches us?
- Tapsnap
- · Replies 3 ·
Graduate Exoplanet Dynamics: Investigating Planet Migration
- Kurdt
- · Replies 7 ·
Graduate What exactly is it being bent by gravity?
- Tapsnap
- · Replies 6 ·