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 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 Can artificial gravity initiate fusion in hydrogen?
- oldunion
- · Replies 6 ·
Graduate Holographic universe theory and collective consciousness
- rody084
- · Replies 19 ·
High School Software or tables for inter-planetary distances on specific dates
- 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 Finding papers on massive planet migration mechanisms
- Kurdt
- · Replies 7 ·
Graduate What exactly is it being bent by gravity?
- Tapsnap
- · Replies 6 ·
Graduate Where did the energy in the CMB go to?
- moving finger
- · Replies 65 ·
Graduate Can Cosmic Inflation Explain the Accelerating Universe?
- X-43D
- · Replies 2 ·
Undergrad What Is the Difference Between Flux and Intensity in Astronomy?
- orange
- · Replies 1 ·
Graduate Hydrogen cloud without stars: does it need dark matter to hold together?
- ohwilleke
- · Replies 33 ·
Graduate Flatness Problem: Understanding Resolution in Big Bang Model
- moving finger
- · Replies 5 ·
Undergrad How does rocket thrust affect a satellite's circular orbit?
- starbaj12
- · Replies 13 ·
Graduate CCC-I: Challenging Observations & New Picture of the Universe
- Garth
- · Replies 60 ·
Graduate How did globular clusters get their properties?
- fastartcee
- · Replies 6 ·
Graduate Does VIRGOHI21 pose a problem for MOND?
- marcus
- · Replies 6 ·
Graduate Dark matter galaxies, stars and planetoids
- Loren Booda
- · Replies 8 ·
High School What happens at the edge of the universe?
- mmmmm
- · Replies 16 ·
Graduate Hawking Radiation – Empty space virtual antiparticle-particle pairs
- RandallB
- · Replies 1 ·
Undergrad Questions for a college student in astro.
- brucephy
- · Replies 4 ·
Graduate Unreasonable aim of the Creator?
- moving finger
- · Replies 5 ·
Graduate What happens to matter that falls into a black hole?
- JohnnyTheFox
- · Replies 2 ·
Undergrad Where Has All the Antimatter Gone Since the Big Bang?
- hexhunter
- · Replies 2 ·
Undergrad Can we observe stars whose light hasn't reached Earth yet?
- Qyamat
- · Replies 1 ·
Undergrad Online undergraduate reading resource for Astrophysics request
- Superlativity
- · Replies 3 ·
Graduate Measuring Io's rotational speed with Doppler shift when not perpendicular to observation
- Link
- · Replies 1 ·
Graduate A search for traces of cosmic string didnt find much
- marcus
- · Replies 10 ·
Graduate Could we test graviton leakage with Earth-Moon laser ranging?
- Dorje
- · Replies 9 ·
Graduate Why no 'Big Crunch' a femtosecond after Big Bang ?
- fastartcee
- · Replies 2 ·
Graduate Difference between flare, CME and SPEs
- Jairo
- · Replies 3 ·
Graduate What is the connection between dark energy and dark matter?
- gathrey
- · Replies 3 ·
High School Astronomy is the oldest of the physical sciences
- chesterdaly
- · Replies 4 ·
Graduate What does it mean for the universe to be "flat"?
- UrbanXrisis
- · Replies 2 ·
SciAm Lineweaver cosmology article, March issue
- marcus
- · Replies 5 ·
Graduate Do 3D and 4D Universes Share the Same Geometry?
- Gold Barz
- · Replies 3 ·
Graduate How Do Scientists Determine Exoplanet Characteristics from Radial Velocity Data?
- Dracovich
- · Replies 13 ·
Graduate What is the upper and lower bound for reionization?
- wolram
- · Replies 16 ·
Graduate Several moons in the Saturn system
- Nereid
- · Replies 6 ·
Graduate Local Pristine Primordial Material
- Mad Arab
- · Replies 12 ·
Undergrad What temperature heats accreted gas emitting 10 keV X-rays?
- tony873004
- · Replies 7 ·
Undergrad Will an Astronaut Float at the Positional Median Between Earth and Moon?
- evthis
- · Replies 3 ·
Graduate How do Gravitons escape from a Black Hole?
- moving finger
- · Replies 11 ·
Graduate Is redshift 1.4 really record-breaking for galaxy XMMU J2235.3-2557?
- marcus
- · Replies 4 ·
Will NASA's Future Missions Be Impacted by Funding Challenges?
- Zach_C
- · Replies 2 ·
Stargazing Long-exposure mod for the quickcam
- russ_watters
- · Replies 12 ·
Undergrad Can Black Holes Alter the Movement of the Universe Through Light Bending?
- taeth
- · Replies 13 ·
Graduate Why is our galaxy's dark matter distribution non-spherical?
- magickingdl
- · Replies 4 ·
High School Brightest Explosion Ever Observed
- Astronuc
- · Replies 10 ·
What color would the end star be if a red star and a blue star collided?
- Eridanus1
- · Replies 3 ·
High School How is the Distance Between Stars Measured?
- funkwort
- · Replies 1 ·
Undergrad Why Do Globular Clusters Maintain Their Shape Over Billions of Years?
- Eridanus1
- · Replies 2 ·
Graduate Initial condition of the restricted problem of three bodies
- Heimdall
- · Replies 11 ·
Graduate Do black holes and the Big Bang singularity both have maximum entropy?
- kirovman
- · Replies 5 ·
Graduate Weyl Curvature Hypothesis and entropy
- ryokan
- · Replies 18 ·
Graduate What is the significance of the recently discovered nearby newborn galaxies?
- hellfire
- · Replies 2 ·
Undergrad How Can You Measure Star Distances Using Ancient Astronomical Techniques?
- Garret
- · Replies 6 ·
Graduate Higgs ocean, dark energy and quantum fluctuations: related manifestations?
- Loren Booda
- · Replies 5 ·
Graduate Finding total orbital energy from gravitational force
- DB
- · Replies 11 ·
Undergrad Can matter be converted to energy and converted back?
- Daark Nova
- · Replies 14 ·
Graduate Could Other Universes Fine-Tune Their Own Inhabitants?
- Gold Barz
- · Replies 3 ·
Graduate What is the latest research on CMB anisotropy and its implications?
- Chronos
- · Replies 2 ·
Cosmology: Sales Pitch or Science?
- wolram
- · Replies 5 ·
Graduate Crisis in Cosmology: CCC-I Conference Challenges Observations
- brightstar2005
- · Replies 1 ·
Sending your name to Pluto on NASA's spacecraft
- Andromeda321
- · Replies 4 ·
Graduate Spontaneous inflation and the origin of the arrow of time
- Chronos
- · Replies 8 ·
Undergrad Is there a maximum mass limit for stars in the universe?
- DB
- · Replies 4 ·
Graduate Why do books describe the universe as a torus or saddle?
- touqra
- · Replies 9 ·
Undergrad Can we please look for 'New Earth' at Alpha Centauri?
- Eridanus1
- · Replies 3 ·
Graduate Black holes bend light the wrong way
- wolram
- · Replies 6 ·
Undergrad Calculating the Centre of Mass in a 2-Body System
- davehatton01
- · Replies 1 ·
Can the Moon's rotation be affected by Earth's tides?
- willib
- · Replies 5 ·
Graduate New MOND Papers: Jacob Bekenstein’s TeVeS Breakthrough
- ohwilleke
- · Replies 3 ·
Graduate Is There Meaning in an Empty Universe?
- honestrosewater
- · Replies 24 ·
Interstellar propulsion island hopping the Oort cloud
- Eridanus1
- · Replies 2 ·
High School Can moons have moons in our solar system?
- JV
- · Replies 9 ·
Graduate Why are the theoretical and measured sizes/ages of the universe so similar?
- warpsmith
- · Replies 14 ·
Graduate Help with Orbit Sim: 2-Body Anomalous Motion Problem
- check
- · Replies 2 ·
Graduate What are gravitational waves and where do they come from?
- billy_boy_999
- · Replies 11 ·
Undergrad A body intermediate to stars and galaxies
- Loren Booda
- · Replies 3 ·
High School What makes the border of the universe and can it change?
- whatzzupboy
- · Replies 30 ·
Undergrad How is exoplanet mass found by astrometry?
- physkid
- · Replies 10 ·
Graduate The Moon and the Anthrorpic Principle
- ion
- · Replies 3 ·
Graduate Accelerated expansion: is the jury still out?
- Chronos
- · Replies 3 ·
High School Astronomy & Cosmology: What's the Difference?
- DanReit
- · Replies 2 ·