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 What Does 'Quake Confinement' Mean in Astrophysics?
- vette982
- · Replies 2 ·
Graduate Wormholes and time travel - Problem
- valdar
- · Replies 4 ·
Graduate What is Causing The Universal Expansion?
- Stratosphere
- · Replies 10 ·
High School How do astronauts communicate with Earth during space missions?
- yalgaar
- · Replies 4 ·
Galaxy's centre tastes of raspberries and smells of rum
- mgb_phys
- · Replies 1 ·
Graduate CMB Redshift Question (Visible Wavelengths)
- Capler
- · Replies 2 ·
Graduate The Mystery of Expanding Space: Uncovering the Truth Behind Dark Energy
- Peter Watkins
- · Replies 96 ·
Undergrad How to Calculate Inclination Angle for Galaxies in the Tully-Fischer Relation
- Snowdeity
- · Replies 1 ·
High School Suggest topics for a 1-sem HS Astronomy course
- ks_physicist
- · Replies 3 ·
High School How does the Satellite manage to stay in earth's orbit?
- yalgaar
- · Replies 5 ·
Stargazing Buy a Telescope Under $400 | Astronomy For Beginners
- wil3
- · Replies 15 ·
Undergrad Age of the sun+age of previous stars = universe ?
- curiousOne
- · Replies 6 ·
High School Looking at center of our galaxcy question.
- Cyrus80772
- · Replies 1 ·
Graduate Is spacetime truly flat without gravitational influences?
- Mr. Paradox
- · Replies 4 ·
Graduate How Does Magnetism Influence Black Holes Despite Escape Velocity Challenges?
- Maplesyrup
- · Replies 7 ·
High School Plotting Elliptical Orbits for Beginners
- Stratosphere
- · Replies 1 ·
Graduate What is the time dependence of the Omegas?
- Amanheis
- · Replies 8 ·
Graduate Could a Black Hole Explode Like the Big Bang?
- JimboLittle
- · Replies 2 ·
High School Can anyone explain the need for elipses?
- NWH
- · Replies 27 ·
Graduate Is spacetime the surface of a 5 dimensional ball.
- Spinnor
- · Replies 3 ·
Undergrad Turbulent Cells and Telescopes: Seeking Help
- skiboka33
- · Replies 2 ·
Graduate Can dark matter be trans-Seaborg elements?
- squidsoft
- · Replies 3 ·
Undergrad Can someone explain angular power spectrum
- hadoque
- · Replies 2 ·
Graduate What do you think about the Cosmic String theory?
- klite
- · Replies 3 ·
High School Which is Better for Stargazing: Sea Level or High Elevation?
- sderamus
- · Replies 1 ·
High School Can we travel back and forward in space?
- mathfigure
- · Replies 6 ·
Undergrad What Are Good Resources for Understanding the M-sigma Relationship in Astronomy?
- jeebs
- · Replies 2 ·
Graduate Lyman-Alpha Blobs emit very specific UV light
- thenewmans
- · Replies 3 ·
Undergrad What would we need for a warp drive?
- klite
- · Replies 9 ·
Graduate Measuring the Expansion of space
- robousy
- · Replies 19 ·
Undergrad Calculating time based on solar position
- fyzle
- · Replies 1 ·
Undergrad Is 10 Arc Seconds Accurate Enough for Sending Objects to the Moon?
- Solistics
- · Replies 1 ·
Graduate Cosmology Question: Finite Universe with Overdensity & Cosmological Constant
- qraal
- · Replies 14 ·
Undergrad Black Hole Brief: Seeking Feedback
- PeterToft
- · Replies 3 ·
High School Understanding the Moon's Role in Tides
- chmate
- · Replies 39 ·
Graduate Does black holes exist all around us?
- wavingerwin
- · Replies 4 ·
Graduate What density does something have to have to be considered a black hole?
- klite
- · Replies 1 ·
Graduate Is Chaos a Property of Time Since the Big Bang?
- aaryan0077
- · Replies 2 ·
The universe where McCain got elected.
- SpaceGuy50
- · Replies 24 ·
High School Lightning in Space: Fact or Fiction?
- muser
- · Replies 3 ·
Graduate Getting vectors out of JPL Horizons
- DiamondGeezer
- · Replies 9 ·
High School Looking for the Virgo constellation
- orthovector
- · Replies 20 ·
Undergrad What Are Orbital Vectors and How Do I Calculate Them?
- Solistics
- · Replies 10 ·
Graduate How do you work out the largest angular scale to which it is sensitive
- Tomboland
- · Replies 2 ·
High School Why is the dust tail of a comet a tail?
- edoarad
- · Replies 4 ·
Is It Possible To View The Milky Way In The UK
- samspade
- · Replies 1 ·
Undergrad Wormholes for Dummies Question .
- Djrob99
- · Replies 22 ·
Local Group Center: Direction of Center
- Pjpic
- · Replies 3 ·
Undergrad What Happens If a Spaceship Exceeds the Speed of Light?
- Mr. Paradox
- · Replies 4 ·
Graduate Why should the expansion of the universe be slowing down?
- edoarad
- · Replies 19 ·
Graduate Solving Spectral Plotting Confusion with Hitran Database Data - Help Needed!
- nordmoon
- · Replies 1 ·
Graduate Creating a Mini Self-Sustaining Star: The Superstrong Chamber Experiment
- Mr. Paradox
- · Replies 9 ·
Graduate What is a Graviton? Reconciling Gravity and Quantum
- TalonD
- · Replies 10 ·
High School Making The Best of Light Polluted Skys
- Stratosphere
- · Replies 3 ·
Graduate How do solar neutrinos interact with nuclei to create radioactive elements?
- Wantstolearn
- · Replies 2 ·
Poll: Have you ever seen a UFO, alien or cosmic object?
- Malexoin
- · Replies 9 ·
Undergrad Calculating Delta-V in Hohmann Transfer Equation
- Solistics
- · Replies 2 ·
Undergrad Why is the center of the galaxy located on the elliptic?
- Pjpic
- · Replies 2 ·
Graduate Is Zero Point Energy a Fundamental Part of the Material Universe?
- redhedkangaro
- · Replies 2 ·
Graduate Is another ame for the zero point energy field, the vacuum?
- redhedkangaro
- · Replies 3 ·
Graduate Questions about black holes for a fictional story
- Ryan Fenton
- · Replies 7 ·
Graduate Questions about the origin of the universe
- kasse
- · Replies 94 ·
Graduate Can the Universe Keep Dividing into Smaller Clumps of Matter?
- lubuntu
- · Replies 25 ·
Graduate Expanding universe and solar system
- Dmitry67
- · Replies 2 ·
Graduate Where Does the Energy of Redshifted Light Go?
- JuanCasado
- · Replies 47 ·
Graduate Is the Expansion of the Universe Linked to Our Perception of Time?
- steven_red
- · Replies 13 ·
Undergrad Stationary satellite in high latitude
- pixel01
- · Replies 5 ·
Undergrad Question about the expansion of the universe
- mazen_zone
- · Replies 12 ·
Undergrad Star Catalogue Question - Stars near the Ecliptic
- wgk22
- · Replies 2 ·
Undergrad Deorbiting q, low speed reentry?
- MonstersFromTheId
- · Replies 8 ·
Graduate Gravitational Constant: G=0.0412 pc (km/s)^2 M_{\odot}^{-1}
- APhysxStudent
- · Replies 1 ·
Challenge, tell me what the u is about in ten easy steps
- wolram
- · Replies 1 ·
Graduate Are Black Holes Theoretical Phantoms?
- Phrak
- · Replies 12 ·
Graduate Initial Mass Function physics problem
- cluckaluck
- · Replies 3 ·
Graduate Can I Survive Moving Into a Black Hole?
- SheepWShotgun
- · Replies 2 ·
How Can We Effectively Communicate with Extraterrestrial Life?
- frankinstein
- · Replies 14 ·
Graduate Big bangs origin relative to the earth's location
- a^6
- · Replies 26 ·
High School Origins of the universe theories?
- Clover228
- · Replies 5 ·
Graduate When Should I Study Thermal Physics Relative to Quantum Mechanics?
- orthovector
- · Replies 4 ·
Stargazing Will Reflector Telescope Work Without Eyepiece?
- Abd Errahmane
- · Replies 3 ·
Stargazing Help My telescope fell and now it won't focus
- danielandpenn
- · Replies 8 ·
Graduate Dark matter and microscopic black holes
- phsopher
- · Replies 9 ·
Graduate Are space and time definable without atoms?
- ConradDJ
- · Replies 53 ·
Graduate Expanding Space: How Do We View It?
- wolram
- · Replies 14 ·
High School Help w/Viewing Saturn and other stuff
- mikeluvs43
- · Replies 4 ·
Graduate Solution help for the Geodesic Equation
- Jack3145
- · Replies 2 ·
North Korea about to launch ICBM test and/or space satellite
- signerror
- · Replies 124 ·
Graduate Sunyaev Zel'dovich effect - redshift independence
- v0lD
- · Replies 10 ·
Graduate FRW vs. Minkowski: Variable Speed of Light?
- nicksauce
- · Replies 3 ·
Undergrad The Circle and Sphere - Why so prevelant in the Universe?
- Techno-Raver
- · Replies 30 ·
Graduate Gravity and universe expansion could be caused by the same thing.
- only_theory
- · Replies 1 ·
Undergrad How is the Age of the Universe Calculated Despite Light Travel Distance?
- jtsw1959
- · Replies 12 ·
High School Answer: Declination of the Sun - Spring Equinox
- Maria76
- · Replies 9 ·
Graduate Is the universe infinite in size?
- ercatli
- · Replies 12 ·
Graduate How do Black holes radiate energy?
- Chaos' lil bro Order
- · Replies 5 ·
Undergrad How do the s-process and r-process create elements in stars?
- Marty-0750
- · Replies 2 ·
Undergrad Why Does Our Galaxy's Center Look Bright Despite a Black Hole?
- jobyts
- · Replies 2 ·
Undergrad Prof. Kaku's approach on why we haven't met intelligent E.T. life.
- Mentat
- · Replies 23 ·
North Korean Satellite Fate | Know Today's Launch
- pixel01
- · Replies 1 ·
Undergrad Calculate distance between stars in a globular cluster?
- caesarborgia2
- · Replies 1 ·