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 Evidence against existence of dark matter?
- mooberrymarz
- · Replies 3 ·
High School Space Ship One (SS1): Breaking the Sound Barrier and Making History
- Orion1
- · Replies 2 ·
Is Vega visible from Atlanta now?
- syano
- · Replies 10 ·
SpaceShipOne reached 100 km this morning
- marcus
- · Replies 6 ·
Private Rocket Plane Makes Historic Space Flight
- Miles
- · Replies 4 ·
Undergrad Is the Red Shift of Distant Stars Really Due to Cosmic Expansion?
- jfxjmn
- · Replies 3 ·
High School If the Earth was a giant metal cube..
- smithpa9
- · Replies 8 ·
Graduate Nonspecialist qstns:ie, massless=no space?
- mercmisfire
- · Replies 1 ·
High School What is the nearest supernova candidate (maybe Betelguese?)
- RAD4921
- · Replies 4 ·
Graduate How gravity arises from spacetime curvature?
- weio
- · Replies 29 ·
High School What was the bright flash I saw in the sky last night?
- check
- · Replies 6 ·
Graduate What happens to a star in orbit around a black hole?
- force5
- · Replies 5 ·
Undergrad Extra-solar Planets : Mass vs. Orbital Distance
- Janus
- · Replies 6 ·
Undergrad Sedna's Orbit: How Gravity Keeps it Tied to Our Solar System
- Echo 6 Sierra
- · Replies 9 ·
Graduate Intergalactic doldrums - flotsam and jetsam
- Loren Booda
- · Replies 9 ·
High School Understanding Binary Stars: Types and Definitions
- nautica
- · Replies 6 ·
Undergrad Are there advantages to launching space missions from the Arctic/North Pole?
- Arctic Fox
- · Replies 9 ·
High School Universe Expansion: How Space is Created
- decibel
- · Replies 5 ·
Graduate Move something about the size of the ISS
- MonstersFromTheId
- · Replies 8 ·
High School Universe Ingredients: What Makes Up Our Universe?
- wolram
- · Replies 3 ·
Graduate Is Spacetime a Dynamic Entity Influenced by Motion and Antimatter?
- Antonio Lao
- · Replies 5 ·
Graduate Can the Space-Buoy Determine Universal Rest in a Relativistic Inertial Frame?
- ram1024
- · Replies 22 ·
Graduate Is Cosmos Homogeneous, Isotropic ?
- Antonio Lao
- · Replies 8 ·
Graduate Is the Universe Bound by the Laws of Conservation?
- Mikado
- · Replies 3 ·
Kerry's vision for the space program
- Phobos
- · Replies 1 ·
Undergrad G.warming: something to wobble about
- scott_sieger
- · Replies 10 ·
Graduate Is Quantizing Spacetime Possible According to the 2nd Law of Thermodynamics?
- Antonio Lao
- · Replies 25 ·
Graduate Universe as a simple harmonic oscillator
- kurious
- · Replies 1 ·
Graduate Can Time and Space has Duality ?
- Antonio Lao
- · Replies 2 ·
Whatever happened to the Mars rovers?
- Loren Booda
- · Replies 4 ·
Graduate Two Big Bang Theory Vs Other Theories
- Riverrobert
- · Replies 9 ·
Undergrad Challenges of Life on Extra-Solar Planets: A Review of Latest Findings
- nautica
- · Replies 2 ·
High School Venus Transit: Why Does It Look Like It Changes Direction?
- waynet
- · Replies 7 ·
Graduate Can Zero Point Energy Explain the Cyclical Universe?
- sol2
- · Replies 1 ·
Graduate Shapiro Effect and Gravitational Lensing
- shrumeo
- · Replies 6 ·
Graduate Gravity and Energy Conservation in Stars: Understanding Gravitational Collapse
- bootsam
- · Replies 1 ·
High School How much fuel does cassini have on board?
- fbsthreads
- · Replies 2 ·
High School Help Distance between Mu Leporis & Nihal?
- MonstersFromTheId
- · Replies 9 ·
Graduate Can We ever Hear Gravity's Music ?
- Antonio Lao
- · Replies 8 ·
Undergrad Exploring Conflicting Age Views: Universe & Earth in Religion vs. Physics
- Tom McCurdy
- · Replies 8 ·
Undergrad Transit of Venus mathematics please.
- Adrian Baker
- · Replies 2 ·
Graduate How important/fundamental is self-similarity in cosmic structure?
- setAI
- · Replies 3 ·
Undergrad Voyager: How Did They Navigate Unknown Worlds?
- one_raven
- · Replies 7 ·
Undergrad How Does Gravity and Center Influence Orbit in Astro-Physics?
- Moonrat
- · Replies 8 ·
Graduate Detailed Mass-Luminosity Relation for Main Sequence Stars
- Jenab
- · Replies 12 ·
Graduate Oscillating universe and harmonic oscillator
- kurious
- · Replies 2 ·
Graduate Did a Pre-Big Bang Species Cause the Big Bang Theory?
- Plagosus
- · Replies 8 ·
Graduate PARALLEL WORLDS to hit shelves in OCT.
- Ebe
- · Replies 4 ·
Graduate Mars Exploration-is Human Settlement Possible?
- Dr. Raj Baldev
- · Replies 18 ·
Undergrad Odd Black Hole Defies Explanation : space.com
- Ivan Seeking
- · Replies 3 ·
Undergrad Most complex extraterrestrial molecule
- Loren Booda
- · Replies 10 ·
Undergrad Temp increase of sun from photosphere to corona
- nautica
- · Replies 5 ·
Graduate Red Shift caused by space itself ?
- nigel johnstone
- · Replies 2 ·
Graduate Calculating Minimum Distance between Elliptical Orbits | Orbital Distance Forum
- Coelum
- · Replies 2 ·
Transit of Venus - Witnessed by Excited Friends on a Hazy Day
- Tom McCurdy
- · Replies 4 ·
Conjunction of Venus and Sun a rare event
- Kerrie
- · Replies 10 ·
Graduate How Did Time Begin After the Big Bang?
- europium
- · Replies 10 ·
Graduate Question-can a neutron star shed mass?
- Duane M
- · Replies 3 ·
Graduate Universe's Energy Creation and Big Bang: 4 Questions Answered
- Pattielli
- · Replies 4 ·
Graduate Modeling a Star: Struggling with Newton-Raphson Technique
- mccizmt2
- · Replies 1 ·
High School What periodic motion is used as a reference
- Lindseynh
- · Replies 1 ·
Graduate Cosmology: Expansion & Redshift Explained
- Alamino
- · Replies 10 ·
Graduate Is Our Understanding of Gravity and Entropy Incomplete?
- Chronos
- · Replies 1 ·
Graduate What happened Before the Big Bang
- Filter
- · Replies 11 ·
Graduate Orientation of virtual particle pairs in local fields?
- turbo
- · Replies 6 ·
Graduate Does Zero Point Energy Influence Gravitational Effects in Space?
- techwonder
- · Replies 15 ·
Graduate Size of universe and uncertainty principle
- kurious
- · Replies 7 ·
High School How fast is earth moving trough space?
- tumor
- · Replies 3 ·
Undergrad Where can I find comprehensive formulas for Celestial Mechanics?
- Ravine
- · Replies 9 ·
High School Why do all the planets orbit the sun?
- repugno
- · Replies 18 ·
Undergrad How Do I Convert the Gravitational Constant to Pixels?
- devil
- · Replies 1 ·
Graduate Analogous Hawking Radiation from Astrophysical Black Hole Accretion
- 25
- · Replies 4 ·
Graduate Can Dark Energy Influence the Minimum Unit of Space in the Universe?
- kurious
- · Replies 4 ·
Undergrad Dual Planetary Life: Is It Possible?
- Nibles
- · Replies 11 ·
High School Can an Asteroid Really Destroy Earth in 800 Years?
- Razi Abid
- · Replies 8 ·
Graduate How the calculated total velocity derived ?
- Venus50
- · Replies 4 ·
Undergrad Redshift & Expansion: What Else Is There?
- shrumeo
- · Replies 32 ·
Undergrad A simple explination of why clocks move faster in space
- Mad_Gouki
- · Replies 19 ·
Stargazing Spitzer Telescope spies 'youngest' planet
- pelastration
- · Replies 2 ·
Graduate What happens when you turn on the light in a simple thought experiment?
- force5
- · Replies 10 ·
Undergrad What Would a Martian Calendar Look Like for Well-Established Colonies?
- MonstersFromTheId
- · Replies 5 ·
High School Predict Clear Skies: Easy Ways to Forecast Stargazing Nights
- Eh
- · Replies 6 ·
Graduate Superconductive Planck/Scale Space
- PFanalog57
- · Replies 4 ·
Undergrad Calculate the gravitational field of a object
- taylordnz
- · Replies 2 ·
High School When will the Stars Die Out? - What Makes It?
- Nec
- · Replies 3 ·
Graduate Have Cosmologists Determined the Total Mass of the Universe?
- Antonio Lao
- · Replies 20 ·
Undergrad What are the Characteristics of Short Gamma Ray Bursts?
- cangus
- · Replies 13 ·
Graduate Entering the Sphere of Influence
- Venus50
- · Replies 2 ·
Graduate Investigating Anomalous Acceleration of Pioneer 10
- kurious
- · Replies 14 ·
Graduate And the question remains, is our Universe really a Hologram?
- startic84
- · Replies 2 ·
Undergrad Understanding Galaxy Formation and the Factors Influencing Their Size
- Vast
- · Replies 3 ·
Graduate Virtual particles and cosmological expansion
- turbo
- · Replies 8 ·
Undergrad Looking for a *3D navigable* star map.
- MonstersFromTheId
- · Replies 8 ·
Technical name for the moon is Irene
- numberPI
- · Replies 5 ·
Undergrad How Can I Simulate a Star Collision on a Computer?
- Pattielli
- · Replies 2 ·
Compatibility of Orion Solar Filter for Celestron 60 AZ Model
- Dagenais
- · Replies 3 ·
Graduate Can the Hubble Expansion Explain the Mechanism of Gravity?
- darkbob5150
- · Replies 53 ·
Undergrad Neutron stars seem an oddity to me
- wolram
- · Replies 7 ·