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 Source of gammas from Milky Way centre
- Nereid
- · Replies 5 ·
Undergrad What Causes Galactic Plains?
- M.C.
- · Replies 5 ·
High School What is the largest known orbit?
- M.C.
- · Replies 2 ·
Graduate Avoiding A Crash Course In Planetary Defense
- Ivan Seeking
- · Replies 3 ·
Undergrad Spirit Rover Nightshot 'object'?
- check
- · Replies 7 ·
Graduate Plotting 180 Degrees Apart Galaxies in Spacetime Diagram
- thorium
- · Replies 1 ·
Graduate Unveiling the Ultra Deep Field: The Big Bang Blast of 10,000 Galaxies
- Orion1
- · Replies 3 ·
Undergrad An ignorant question about cosmology
- billy_boy_999
- · Replies 8 ·
Graduate Osiris, a chthonian planet - a very physical hell?
- Nereid
- · Replies 8 ·
Graduate Physics in the distant universe - same as on Earth? (history question)
- Nereid
- · Replies 3 ·
Undergrad How far back in time can we observe with our current technology and telescopes?
- meteor
- · Replies 28 ·
Graduate Searching for the Centre of the Universe: Is it at Rest?
- JulianHeawood
- · Replies 1 ·
Graduate How Does a Crystal Turn Space Inside Out?
- Evo
- · Replies 5 ·
Graduate Are there practical applications for l2 in mathematics and physics?
- sparkster
- · Replies 3 ·
High School Have Scientists Discovered a 10th Planet in Our Solar System?
- Grizzlycomet
- · Replies 10 ·
Bush's Moon-Mars Initiative: Political Tool or Real Space Program?
- Phobos
- · Replies 6 ·
Graduate Seeking Answers to Geophysical Questions About the Big Bang Theory
- JulianHeawood
- · Replies 4 ·
Hubble Supernova Discovery: WOW BEAUTIFUL
- Tsu
- · Replies 4 ·
Graduate Exploring the Limits of GRBs: A Look at the Integrated Sachs-Wolfe Effect
- wolram
- · Replies 12 ·
Graduate Type Ia Supernovae Evidence of Cosmic Deceleration & Acceleration
- wolram
- · Replies 2 ·
High School Is it Possible to Fly an Airplane on Mars?
- Thomas1980
- · Replies 3 ·
Graduate Where in the UNIVERSE, if at ALL does the past exist?
- kjacobie
- · Replies 12 ·
Undergrad Understanding Birkeland Currents in Space
- wolram
- · Replies 6 ·
NASA Finds Evidence of "Soaking Wet" Mars with Rover
- Phobos
- · Replies 7 ·
Graduate Does the MBR display orbital motion relative to us?
- Loren Booda
- · Replies 5 ·
What can (US) amateur astronomers do to help save Hubble?
- Nereid
- · Replies 3 ·
Remind you that Jupiter is really close to Earth
- eagleone
- · Replies 4 ·
High School Astronomy Project Ideas: Star Collision & More!
- BlackJack
- · Replies 4 ·
High School Can Stars Really Collide?
- BlackJack
- · Replies 3 ·
Graduate WMAP Data Distortion: Recent Evidence
- wolram
- · Replies 18 ·
High School How can gyros and fins on spaceships improve long-term survival in space?
- Sariaht
- · Replies 5 ·
Graduate Under abundance of lithium may solve existence DM
- wolram
- · Replies 2 ·
High School Unravelling the Mystery of Dark Matter
- gunblaze
- · Replies 2 ·
Graduate Oscilating Universe WITH Perpetual Expansion
- LURCH
- · Replies 2 ·
Graduate Why Does an Observer Not See Entering a Black Hole?
- slow progress
- · Replies 2 ·
Undergrad Measuring Astronomical Distances
- jay
- · Replies 3 ·
High School Earth almost put on impact alert
- Ivan Seeking
- · Replies 12 ·
Graduate What is the significance of Fermat's Last Theorem in modern mathematics?
- PFanalog57
- · Replies 54 ·
High School What does space look like from space?
- CGameProgrammer
- · Replies 7 ·
High School Comparing Telescopes: Konus 500 vs Konus 200 vs Mead LDX55
- Squeeze
- · Replies 2 ·
Graduate Roser Pello's galaxy is receding at 2.3 times the speed of light
- marcus
- · Replies 6 ·
Undergrad Observe all the ages of the universe
- juan avellaneda
- · Replies 3 ·
Opportunity makes 'significant' finding
- Evo
- · Replies 2 ·
High School UFO's trapped in the black hole
- gunblaze
- · Replies 2 ·
High School Universe Age: 13 Billion Years, Revealed by Light Travel
- Dagenais
- · Replies 26 ·
Graduate Effects of acceleration on black holes.
- Lord Flasheart
- · Replies 2 ·
Graduate How could two Big Bangs have created the Universe?
- Shailinder
- · Replies 1 ·
Graduate How Does the Gap Theory Unify Spacetime and Quantum Mechanics?
- Radic
- · Replies 27 ·
Undergrad Does gravity play a role in the expansion of the universe?
- Sko
- · Replies 9 ·
High School Spacefuel: Utilizing Iron-Dust as a Cheap and Efficient Fuel Source
- Sariaht
- · Replies 3 ·
Graduate Physics in distant galaxies - same as on Earth? (history question)
- Nereid
- · Replies 10 ·
High School Is Dark Matter Different from Black Matter?
- alias25
- · Replies 17 ·
Graduate Dark Age: Galaxy & Quasar Formation ?
- Aquafire
- · Replies 2 ·
High School Sunspots: Viewing at Home - Simplest Method
- wimms
- · Replies 6 ·
Discernment , duality and perception ,singularity (not black hole)
- peter goldman
- · Replies 4 ·
Graduate Ekpyrotic model and CMB observations?
- branebrain
- · Replies 3 ·
Graduate Can We Determine the Age of the Universe Based on the Color of the Night Sky?
- Antonio Lao
- · Replies 1 ·
Graduate Existence of dark matter questioned
- wolram
- · Replies 27 ·
Graduate Comparing different kinds of dark energy
- marcus
- · Replies 1 ·
High School Why Do Stars Twinkle? Supernovas & Photons
- alchemist
- · Replies 8 ·
Undergrad Questions about Universal Gravitation
- Blood Junkie
- · Replies 5 ·
Amateur astronomer finds new nebula
- chroot
- · Replies 3 ·
High School Exploring the Mass & Shape of the Sun
- Guard
- · Replies 14 ·
Space Tourism Survey: Answers Wanted!
- enigma
- · Replies 20 ·
Graduate Crystal Core Discovered in Dying Star
- meteor
- · Replies 7 ·
Graduate Member of Michio Kakus's organisation
- SoumyaBanerjee
- · Replies 1 ·
Undergrad Falling Back to Orbit: Can Rockets Change Their Orbit?
- wimms
- · Replies 1 ·
High School What is the largest object discovered in the Solar System since Pluto?
- meteor
- · Replies 1 ·
Undergrad Gravity acting as a repulsive forces at long distances
- ashwin
- · Replies 4 ·
Graduate Could Einstein have been right originally?
- Shawn Wheeler
- · Replies 5 ·
Graduate Explaining Planetary Spin: Insights and Mathematical Considerations
- Ian
- · Replies 4 ·
Graduate Is There a Tuning Relationship Between Lunar and Solar Periods?
- jjalexand
- · Replies 18 ·
Graduate Another idea for observing dark energy
- marcus
- · Replies 1 ·
Undergrad Could Life Exist in the Hidden Oceans of Jupiter's Moons?
- Orion1
- · Replies 2 ·
Graduate How Are Black Holes Linked to Time Travel?
- startic84
- · Replies 3 ·
Graduate Tamara Davis thesis Expansion and Cosmic Horizons
- marcus
- · Replies 3 ·
Graduate Schw. black hole ringing frequencies
- marcus
- · Replies 9 ·
Black Hole People: Fact or Fiction?
- deda
- · Replies 13 ·
Stargazing Hubble Space Telescope - O'Keefe forced to reconsider?
- Nereid
- · Replies 4 ·
Undergrad Growth of Plants in Zero Gravity
- ZeroGravity
- · Replies 3 ·
Graduate Shouldn't large bodies be hollow?
- the_truth
- · Replies 9 ·
Graduate Spacetime definition in philosophy?
- wolram
- · Replies 9 ·
Graduate Lubos Motl's question about absolute spacetime
- marcus
- · Replies 27 ·
Undergrad Astronomers unravel a mystery of the Dark Ages
- Ivan Seeking
- · Replies 5 ·
Opportunity is on the surface of Mars.
- Integral
- · Replies 14 ·
Lunar Land Grab: Celestial Real Estate Sales Soar
- Ivan Seeking
- · Replies 5 ·
Undergrad Are There Resources to Help Understand Black Holes for an Amateur Astronomer?
- Shahil
- · Replies 2 ·
Undergrad Can Beagle 2 Lander uncover evidence of life on Mars?
- Nommos Prime (Dogon)
- · Replies 22 ·
Could Someone be Watching Us? By Seth Shostak
- Ivan Seeking
- · Replies 14 ·
Mars Gravity Biosatellite programme
- mouseonmoon
- · Replies 2 ·
Graduate Can We Make a Black Hole on Earth?
- lamp post
- · Replies 12 ·
Graduate Recoil may eject black holes from a galaxy
- marcus
- · Replies 15 ·
High School What Is the Size of a Black Hole?
- George
- · Replies 1 ·
Undergrad Can we really see 3D in the universe.
- arivero
- · Replies 13 ·
Undergrad Opportunity Microscopic Camera Image
- tyroman
- · Replies 3 ·
Graduate What the spectrum of radiation of stellar objects depends of?
- Michael F. Dmitriyev
- · Replies 1 ·
Graduate Thoughts on holographic universe and existence in general
- rody084
- · Replies 25 ·
High School Saturn’s Titan Eyed For Increased Exploration
- Ivan Seeking
- · Replies 1 ·
Undergrad How can I determine the date and time using a Planisphere watch?
- one_raven
- · Replies 5 ·