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
Stargazing Hubble Space Telescope - O'Keefe forced to reconsider?
- Nereid
- · Replies 4 ·
Undergrad How would wheat grow in zero gravity and darkness?
- ZeroGravity
- · Replies 3 ·
Graduate Shouldn't large bodies be hollow?
- the_truth
- · Replies 9 ·
Graduate Spacetime definition in philosophy?
- wolram
- · Replies 9 ·
Graduate Does spacetime have absolute reality or is it relational?
- marcus
- · Replies 27 ·
Undergrad How galaxies formed during the cosmic 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 Black hole physics resources for someone with QM and relativity basics
- 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 Can a black hole's diameter be less than one wavelength of light?
- 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 ·
Graduate Parabolic reflector mirrors from spinning liquid metal in space
- SpaceGuy
- · Replies 1 ·
Undergrad Gravity Questions: Measuring and Speed
- mdk42
- · Replies 3 ·
High School Who created the Crunch Theory and the Continual Expansion Theory ?
- SDNess
- · Replies 3 ·
Undergrad Interstellar Travel: Reaching Alpha Centauri
- Blhack
- · Replies 5 ·
Undergrad Double Star characteristic frequencies of light
- mmfoley
- · Replies 2 ·
US Universities for Postgraduate Studies in Astrophysics
- Baggio
- · Replies 19 ·
Graduate Will a blackhole shrink spacetime?
- nymph
- · Replies 13 ·
Undergrad Age of Universe: Dist. to Big Bang vs New Star
- Gonçalo
- · Replies 5 ·
Looking for a Lunar altitude map
- enigma
- · Replies 4 ·
Graduate Alan Guth and Stephen Hawking on Eternal Inflation
- marcus
- · Replies 1 ·
Graduate Gravity fiels and spacetime fabric
- avemt1
- · Replies 1 ·
Graduate Is there a mathematical proof that the universe is infinite?
- Moni
- · Replies 37 ·
How to learn astronomy with just the internet and a library
- Gale
- · Replies 11 ·
Graduate Can Newton's Gravitational Law and Hooke's Law be Unified?
- Orion1
- · Replies 7 ·
What Happened to Spirit Rover on Mars?
- Labguy
- · Replies 32 ·
Graduate Drake Equation: Solving the Probability of Extraterrestrial Civilizations
- Orion1
- · Replies 1 ·
Undergrad Definition of Life: Beyond Organic Matter
- nymph
- · Replies 1 ·
Graduate This is kind of WAY in the future but nevertheless:
- Sikz
- · Replies 5 ·
Graduate Atheistic explanations for the Big Bang?
- plum
- · Replies 3 ·
Graduate Do all galaxies eventually cluster into superclusters?
- wolram
- · Replies 3 ·
Graduate Does the universe exist as a meaningful whole without an outside observer?
- hellfire
- · Replies 1 ·
Graduate Why the Jovian system is better for colonization than Mars and the Moon
- marcus
- · Replies 60 ·
High School What is a planet's order called?
- Nibles
- · Replies 1 ·
Graduate Why do you refuse to consider new evidence and advancements in science?
- Ingvar Astrand
- · Replies 2 ·
Undergrad How big is a BLACK HOLE? Can it be calculated ?
- timejim
- · Replies 5 ·
Graduate For those about to go Surfing tomorrow?Big-Bang new perspective?
- ranyart
- · Replies 3 ·
Is there water on Mars? Check out these amazing pics!
- eagleone
- · Replies 4 ·
Graduate Can the Alcubierre drive overcome superluminal travel challenges?
- plum
- · Replies 25 ·
A great day for space exploration
- Ivan Seeking
- · Replies 24 ·
Graduate Does the Sun's Gravitational Effect Influence the Calculation of Star Distances?
- luiscar
- · Replies 5 ·
Galileo mission fact sheets (in case yr interested)
- marcus
- · Replies 3 ·
High School Is Bush's Moon-Mars Initiative a New Space Frontier?
- Phobos
- · Replies 34 ·
Undergrad What is the Purpose of the Cosmic Ray Observatory?
- Orion1
- · Replies 4 ·
Graduate Has the Origin Point of the Big Bang Been Approximated?
- pallidin
- · Replies 23 ·
Graduate What Are the Best Strategies for Intergalactic Communication?
- FZ+
- · Replies 14 ·
Graduate Could galaxy evolution be hiding dark energy?
- wolram
- · Replies 2 ·
Undergrad Does cosmic expansion affect objects like our hands?
- vera
- · Replies 7 ·
Daft question but it's getting late.
- rdt2
- · Replies 4 ·
High School How do you tell if something in the sky is a planet or a star?
- NanoTech
- · Replies 11 ·
Undergrad Finding a planet's mass from satellite orbital data
- Kacper
- · Replies 22 ·
High School What time does the new moon reach its apex tonight?
- skywise
- · Replies 6 ·
Graduate How Does the Solar Muon Flux Explain the High Temperature of the Corona?
- Thomas2
- · Replies 6 ·
How can we afford space tourism without discounts and referrals?
- enigma
- · Replies 6 ·
Graduate How much of the Milky Way is within the Galactic Habitable Zone?
- marcus
- · Replies 2 ·
Undergrad What does the sun look like from Mars?
- gazza
- · Replies 9 ·
Graduate Galaxy string challenges Models? (News link)
- Torte
- · Replies 2 ·
First victim of moon base/Mars mission?
- Njorl
- · Replies 24 ·
Undergrad LUNAR LASER RANGING Experiment Uncovers Moon's Geology
- wolram
- · Replies 1 ·
High School How Does Hubble Take Pictures of the Universe?
- Andy
- · Replies 5 ·
Graduate The bathe in a good health space time
- hey.like
- · Replies 2 ·
Spirit Landed Successfully, sending pictures
- enigma
- · Replies 7 ·
How do you find which direcion you are travelling in space?
- benzun_1999
- · Replies 9 ·
When will the first Space Wars happen?
- David Ben-Ariel
- · Replies 17 ·
Graduate Why does superheated gas remain hot for billions of years in space?
- bobbyg66
- · Replies 22 ·
Graduate Significance of equal Sun and Moon apparent sizes?
- Loren Booda
- · Replies 5 ·
Stargazing Revolutionizing Telescope Technology: The Potential of Analog Nano-Tech Mirrors
- GENIERE
- · Replies 1 ·
Graduate Israeli technology enables images beamed from Mars
- onycho
- · Replies 5 ·
Solar energy information resources
- Mr. Robin Parsons
- · Replies 1 ·
Graduate The surface of Mars, the loss it’s of atmosphere and the fate of earth.
- Jeff Savage
- · Replies 1 ·
Graduate GEMS - a rich trove of information about galaxy evolution
- Nereid
- · Replies 5 ·
Graduate How do scientists create a map of the sky using cosmic background radiation?
- Nibles
- · Replies 3 ·
Undergrad Is it possible for an object to orbit a stationary object?
- wasteofo2
- · Replies 11 ·
Graduate Lensed quasar observations support dark matter models
- Nereid
- · Replies 11 ·
Undergrad Political and economic arguments for human spaceflight programs
- Ivan Seeking
- · Replies 12 ·
Graduate Are there regions inside the Universe where the Laws of Physics vary?
- ranyart
- · Replies 1 ·
Graduate The production of a black hole using television sets
- marcus
- · Replies 6 ·
Colliding Galaxies; Hot Gas; New News
- Labguy
- · Replies 1 ·
Undergrad What is an active galactic nucleus?
- Dysprosium
- · Replies 1 ·
Graduate Will Gravitational Wave Detectors Challenge Current Theories on Binary Stars?
- Labguy
- · Replies 1 ·
Graduate Is the Universe Analog or Digital?
- HeyCharley
- · Replies 25 ·
High School Does Jupiter's gravity deform Mars's orbit?
- jake_at
- · Replies 6 ·
Graduate Can black holes be used for time travel?
- lan418
- · Replies 13 ·
Undergrad Is the Universe Really Expanding, and Where is it Heading?
- ALM
- · Replies 2 ·
Graduate Why does matter fall into black holes if time slows at the horizon?
- tuscanwarrior
- · Replies 8 ·
Newbie Asks "What Contains the Universe?
- Alertbay
- · Replies 17 ·
High School Two questions about space (new guy)
- Michael Gray
- · Replies 3 ·
High School How Do Astronomers Determine the Distance of Stars?
- brum
- · Replies 15 ·
Graduate How Do Cosmologists Account for the Age of Quasars?
- eclectic_echidna
- · Replies 4 ·