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
High School Examining the Accuracy of "Moon's Orbit Around Earth"
- unrepentant
- · Replies 5 ·
Graduate IGC Inaugural Conference (Institute for Gravitation and the Cosmos)
- marcus
- · Replies 4 ·
Graduate Why Does the Sun's Surface Gravity Seem So Low Compared to Expectations?
- H8wm4m
- · Replies 10 ·
Graduate Entropy in a contracting universe?
- nicktacik
- · Replies 8 ·
Graduate 60 efolds with no inflaton, no slow roll, no reheating-QEG's apt to be right
- marcus
- · Replies 24 ·
High School What is the Astonishing Tail of Star Mira Discovered by NASA?
- Ivan Seeking
- · Replies 3 ·
Undergrad Gamma Ray Bursts: Nature & Why they Last 2 Seconds
- say_physics04
- · Replies 6 ·
High School Is the Sun an Ordinary or Atypical Star?
- Holocene
- · Replies 2 ·
High School How Stars are Formed - Astronomy Basics
- ihopeican
- · Replies 2 ·
Undergrad What is the alternative to the concept of a singularity in cosmology?
- mattex
- · Replies 10 ·
High School Frequency of supernovae in the universe
- Holocene
- · Replies 8 ·
Graduate Supernova types 1a and the accelerating cosmos
- stevebd1
- · Replies 1 ·
Stargazing What can I get to improve telescope
- Saladsamurai
- · Replies 47 ·
Undergrad Spacetravel: t as a function of a and d
- DaveC426913
- · Replies 24 ·
Stargazing Liquid Mirror Telescope: How to create a parabolic shape
- jasc15
- · Replies 3 ·
Graduate Exploring the Big Bang: The Role of Quark Collision Experiments
- uiulic
- · Replies 1 ·
Graduate How Can an Infinite Universe Expand?
- fmichel
- · Replies 33 ·
Graduate Are there any theories about why causality appears?
- arcturus12453
- · Replies 6 ·
Graduate What do we mean by Is the universe losing energy ?
- Robert100
- · Replies 6 ·
Are we going to continue to expand.
- tommyburgey
- · Replies 1 ·
Graduate What Are Gravity, Dark Matter, and Atoms?
- andyp
- · Replies 3 ·
Graduate Can Traveling Through a Black Hole Lead to Another Dimension?
- raccoon
- · Replies 22 ·
Graduate Could the universe's energy density have been greater in the past?
- jostpuur
- · Replies 6 ·
Graduate What Caused the Universe to Come Into Existence?
- Ifrit
- · Replies 6 ·
Graduate How is Lorentz Contraction Manifested in a Distant Supernova?
- japam
- · Replies 1 ·
Graduate Cosmology at differing values of c?
- MarkeD
- · Replies 7 ·
Graduate What Are Some Recommended Graduate Level Texts on Stellar Spectroscopy?
- RJ Emery
- · Replies 1 ·
Undergrad Gravitational Waves: Origin & Mass Impact
- vs_cygnus
- · Replies 6 ·
Undergrad Question re: Planets Facing Each Other
- JorgeMedinero
- · Replies 1 ·
Graduate Let's try something-let me know if you have difficulty
- marcus
- · Replies 20 ·
Graduate A white dwarf formed by a supernova, possible?
- RetardedBastard
- · Replies 2 ·
Undergrad How Can You Calculate the Area of Light Hitting a Dome?
- laminatedevildoll
- · Replies 5 ·
Graduate When was the last time all inner planets aligned in our solar system?
- Loren Booda
- · Replies 4 ·
Graduate How cant EM wawe escape from a black hole?
- fresnelspot
- · Replies 3 ·
Undergrad Moon's Escape Point: Beyond Earth's Gravity
- H8wm4m
- · Replies 11 ·
Undergrad Water found on distant planet (hot Jupiter at 63 LY)
- marcus
- · Replies 5 ·
Graduate Is Consciousness a Process Inherent in the Universe?
- alexsok
- · Replies 21 ·
Graduate Using JPL Horizons to Obtain Inertial Positions and Velocities: A Tutorial
- playmobil
- · Replies 2 ·
Graduate Wright's 'best fit' universe does not expand out into empty space
- marcus
- · Replies 3 ·
Undergrad What is the accepted diameter of the universe?
- Voltage
- · Replies 34 ·
Graduate How Could Quantum Foam Shape Our Understanding of the Cosmos?
- Steve1
- · Replies 2 ·
Do you unfriend people on Facebook/Myspace?
- Simfish
- · Replies 23 ·
Graduate Black Holes & Light: Can Gravitational Force Exceed Speed of Light?
- Liger20
- · Replies 5 ·
What will be the after effects of the suns polar magnetic shifts?
- scarfox
- · Replies 5 ·
Undergrad Black Hole Radius: Facts & Theory
- delta_simon
- · Replies 12 ·
Undergrad Does the Saros Cycle Provide Accurate Eclipse Predictions Across Time?
- lewis198
- · Replies 5 ·
Graduate Model a Cooling Sphere: Finding Resources
- MarkL
- · Replies 2 ·
Graduate Will cosmic microwave background disappear?
- maris205
- · Replies 2 ·
Graduate Another paper helping to clarify expansion-congrats, authors :-)
- marcus
- · Replies 4 ·
What is the empty space in an unopened 2 liter bottle of soda?
- ggh
- · Replies 11 ·
Stargazing Great Canary Telescope - First Light
- Astronuc
- · Replies 1 ·
High School UFO-Inspired Future Spacecraft: Faster Than Mach 4?
- Mackay1011
- · Replies 6 ·
Graduate Is this line element known to anyone ?
- Mentz114
- · Replies 8 ·
Graduate Selecting a Recent Space/Astro Physics Research Topic
- Huma waseem
- · Replies 2 ·
Graduate How does the age of the Universe relate to the Big Bang theory?
- Thor
- · Replies 4 ·
Explore the Universe with Galaxy Zoo
- J77
- · Replies 6 ·
Graduate Expanding Space: the Root of all Evil?
- marcus
- · Replies 12 ·
Graduate Redshift 9, oldest galaxies seen yet
- marcus
- · Replies 1 ·
Undergrad Question regarding sun/moon angle
- vanburen_boy
- · Replies 5 ·
Undergrad Does Superconductivity Occur in Outer Space?
- Loren Booda
- · Replies 2 ·
Graduate The Mystery of Aurora Borealis: Electron Acceleration
- SpitfireAce
- · Replies 10 ·
Graduate Hubble Parameter & acc. Universe
- sergei
- · Replies 8 ·
High School What can I see with my Sky Watcher telescope?
- james bibey
- · Replies 6 ·
Graduate Pre Big Bang universe discovered ?
- DaveC426913
- · Replies 6 ·
How to find any naked-eye object
- eZipSky
- · Replies 5 ·
Undergrad Understanding the Expansion of the Universe Through Low Mass Star Death
- physicshelp1
- · Replies 1 ·
Graduate Big Bang Question: Is Our Universe Expanding Through Vacancy?
- BJL
- · Replies 3 ·
Undergrad What Natural Laws Influence Human Artistic Expression?
- performartist
- · Replies 8 ·
Graduate Simulating the gravitational interaction between two material points
- Signifier
- · Replies 3 ·
Graduate Shining light thru the sun: evidence of axions?
- marcus
- · Replies 2 ·
Graduate How would the solar system capture an extra solar planet ?
- supag33k
- · Replies 14 ·
Graduate Is Our Universe Just a Preon in a Larger Cosmic Structure?
- ziad1985
- · Replies 4 ·
High School Taking Pictures From Outer Space: Color or B&W?
- brianthewhitie7
- · Replies 4 ·
Graduate 'Spinning' the truth about our own Moon?
- Techstuf
- · Replies 17 ·
Which Planets Are Visible Today?
- Hurkyl
- · Replies 4 ·
High School Why the Moon Doesn't Fall on the Earth
- sinisha
- · Replies 15 ·
High School Full Moon Height: When is It Highest?
- haiha
- · Replies 4 ·
Graduate without resorting to scalar fields
- marcus
- · Replies 1 ·
Graduate Another Neptune in the Oort Cloud
- Astrobuff
- · Replies 7 ·
Graduate Is Gravitational Radiation the Key to Unlocking Cosmology's Secrets?
- wolram
- · Replies 8 ·
Graduate On the 'constantness' of Hubble's Constant
- Brinx
- · Replies 8 ·
High School Liftoff for Ceres and Vesta (July 2007)
- marcus
- · Replies 7 ·
Graduate Can MOND be ruled out at laboratory scale?
- Jonathan Scott
- · Replies 7 ·
Graduate Lyman Page new idea for CMB observations
- marcus
- · Replies 5 ·
Graduate Collapsing Stars: White Dwarfs, Neutron Stars & Singularity
- SpitfireAce
- · Replies 2 ·
Undergrad Looking once around the universe
- birulami
- · Replies 7 ·
Graduate MOND-related Formula in GR Calcs at Cosmological Scale
- Jonathan Scott
- · Replies 1 ·
Undergrad What is the impact of the moon's mass on Earth's orbit around the sun?
- ukmicky
- · Replies 5 ·
Graduate Ratio of radiaton energy to mass energy?
- Nasher
- · Replies 13 ·
Graduate Are Parallel Universes Possible According to M-Theory?
- Nasher
- · Replies 3 ·
Undergrad Julian Days: Guide to Formula & Calculations
- lewis198
- · Replies 4 ·
Graduate The link between the cosmological constant and the higgs field
- deneve
- · Replies 6 ·
Graduate Review of Dark Matter and Dark Energy by M. Kamionkowski
- EL
- · Replies 5 ·
Graduate Black Holes: X-rays, Gamma Rays & Light Emission
- Pakbabydoll
- · Replies 3 ·
Graduate Is the Existence of Black Holes Debated Among Astrophysicists?
- George Jones
- · Replies 10 ·
Graduate What Is the Expansion Limit of Our Universe?
- .ultimate
- · Replies 65 ·
High School Mirror Grinding Kits: Wave Aspect Explained
- Saladsamurai
- · Replies 11 ·
Graduate Nice thumbnail sketch of Earth's future by John Baez
- marcus
- · Replies 10 ·
Graduate Theoretically Possible: Opening a Wormhole to Another Location
- Dr.Calpol3
- · Replies 12 ·
Undergrad Could Extraterrestrial Life Exist in Unique Environments Like Titan?
- jonegil
- · Replies 31 ·