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 Ring Nebula: Synchrotron Radiation & Magnetic Fields
- DB
- · Replies 5 ·
Undergrad Investigating Solar Cycles and Their Effects
- |2eason
- · Replies 1 ·
High School Did Comet Machholz Lack a Visible Tail?
- Physicsisfun2005
- · Replies 5 ·
The bermuda triangle is a black hole?
- Sabine
- · Replies 3 ·
Graduate N-body simulation test with sun, earth and moon
- Heimdall
- · Replies 6 ·
Undergrad Big Bang: Causes & Reasons Explained
- afton
- · Replies 11 ·
Where are the Best Spots to View the Milky Way in California?
- Math Is Hard
- · Replies 5 ·
High School Cause of Gravity: How Does It Work?
- afton
- · Replies 8 ·
A Surprising Revelation: The Truth About Asteroids and Earth
- Tom McCurdy
- · Replies 1 ·
Graduate Unexplained preference for infinite space.
- meemoe_uk
- · Replies 5 ·
Graduate Why do patterns exist in the universe?
- connect
- · Replies 6 ·
Undergrad What Will Huygens Discover About Titan's Mysterious Atmosphere?
- Orion1
- · Replies 4 ·
Stargazing Is it Possible for All Planets to Line Up?
- The Bob
- · Replies 5 ·
Graduate Are Flaws in IMAP Data Affecting Our Understanding of Dark Matter?
- godzilla7
- · Replies 2 ·
Undergrad Why Does Venus Rotate Differently?
- Qyamat
- · Replies 5 ·
Undergrad Matter or Energy: Which Came First?
- Qyamat
- · Replies 2 ·
Graduate Can we be tricked into thinking W=-1
- wolram
- · Replies 1 ·
Undergrad What is the concept of concentrated mass?
- DB
- · Replies 4 ·
Consensus: Streak in Image an Insect
- Andromeda321
- · Replies 2 ·
High School Do Planets Generate Their Own Light?
- DB
- · Replies 9 ·
Graduate Idea find black holes using grav. lensing
- woodysooner
- · Replies 4 ·
Graduate Amit Goswami's The Self Aware Universe
- roamer
- · Replies 4 ·
Graduate Gas Giant Ring Collapse Theory for Rocky Planet Formation
- Glenn
- · Replies 1 ·
Possible Meteor Explosion Near Jakarta Causes Loud Noise, No Injuries Reported
- Orion1
- · Replies 1 ·
Graduate Sun's Absolute Velocity: Molecular Measurements & Vacuum Experiments
- cronxeh
- · Replies 3 ·
Undergrad Astronomers observe some galaxy
- Kamataat
- · Replies 6 ·
Undergrad 10^6 X stronger than Earth¹s lightning: Some of Cassini's findings discussed
- Ivan Seeking
- · Replies 1 ·
NOVA special on String/cosmology
- turbo
- · Replies 1 ·
What is the Role of Subspace in Sci-Fi Universes?
- revan
- · Replies 4 ·
Earth's Abrupt Edge: 4B Year Old Star Encounter Revealed
- meteor
- · Replies 1 ·
Graduate What is the motion of a singularity
- Terry Giblin
- · Replies 6 ·
High School What is zeeman and stark effects?
- thephy
- · Replies 2 ·
Graduate Can Black Holes Compute Universes?
- chaoszen
- · Replies 1 ·
Graduate Cosmic Background Radiation & Big Bang
- celal777
- · Replies 15 ·
Is There a Clear Explanation for A-Consciousness?
- RAD4921
- · Replies 43 ·
Did You Spot Any Meteors Tonight?
- marcus
- · Replies 7 ·
Graduate Advanced Civilizations Could Make SETI Signal Detection Impossible
- Ivan Seeking
- · Replies 17 ·
Graduate Little Black Holes: Dark Matter And Ball Lightning
- Ivan Seeking
- · Replies 1 ·
Graduate Is our galaxy in the centre of the universe?
- wolram
- · Replies 4 ·
Stargazing Giant Magellan Telescope GMT Announcement
- meteor
- · Replies 4 ·
Graduate Mass of Jupiter using as Many moons as Possible
- walkera
- · Replies 2 ·
Undergrad The Mystery of H- & HII Ions: Why the Balance Matters
- goleafsgo113
- · Replies 2 ·
Graduate Dark Matter Detection: Controversy Grows
- Chronos
- · Replies 1 ·
Graduate Could Binary Planetary Systems Exist with Earth-Sized Bodies?
- Muon12
- · Replies 22 ·
Graduate Is New Galaxy Formation Possible at the Edge of the Expanding Universe?
- UrbanXrisis
- · Replies 26 ·
Graduate Virtual Pairs and the Fate of the Universe
- Hellburner
- · Replies 4 ·
Graduate Does Dark Matter's Interaction with Gravity Prevent it from Forming Black Holes?
- MisterBig
- · Replies 7 ·
Graduate What Are the Codes for Stellar Astrophysics?
- Astronuc
- · Replies 4 ·
Graduate WMAP 2-Year Data: Findings, Delays & Follow-Ups
- turbo
- · Replies 10 ·
High School Why does the earth rotate around its
- Falnom
- · Replies 3 ·
New comet has brightened to naked-eye visibility
- turbo
- · Replies 5 ·
Graduate How are the galactic jets made in black holes?
- UrbanXrisis
- · Replies 11 ·
High School Investigating the Effect of the Sun on Tides
- Rocky_Road
- · Replies 3 ·
Graduate Does the gravity constant change?
- Rader
- · Replies 3 ·
Graduate Could hot dark matter be cold dark matter?
- Rothiemurchus
- · Replies 4 ·
Graduate Is Dark Matter Really Necessary for Explaining Galaxy Rotation Curves?
- marcus
- · Replies 6 ·
Graduate Why Are White Dwarfs Hot Despite Their High Density?
- DB
- · Replies 2 ·
Undergrad What is the relationship between luminosity and magnitude in stars?
- nobunaga84
- · Replies 2 ·
Stargazing Telescope or Binoculars: Which Makes a Better Gift?
- omicron
- · Replies 10 ·
Graduate ZPE energy levels and cosmology.
- turbo
- · Replies 6 ·
Can anyone tell me which content of astronomy's book or magzine is the best?
- kurtlau
- · Replies 1 ·
Graduate Titanic merger of galaxy clusters revealed
- meteor
- · Replies 18 ·
Undergrad Include Sun's Diameter in Star Distance Measurement?
- DB
- · Replies 2 ·
Graduate Can White Holes and Hawking Radiation Explain the Big Bang?
- UrbanXrisis
- · Replies 28 ·
How to estimate star's mass without gravitation constant?
- smm
- · Replies 3 ·
Undergrad Could Mars Bring Deadly Bugs to Earth?
- Ivan Seeking
- · Replies 2 ·
Graduate Does Phase Space Explain Entropy?
- celal777
- · Replies 5 ·
High School Is Water Essential for Extraterrestrial Life?
- primal schemer
- · Replies 11 ·
Graduate Space Expansion from Dark Matter
- yanniru
- · Replies 17 ·
Graduate A question in Kepler's second and third laws.
- pezzang
- · Replies 11 ·
Incredible Impact Photo: First Ever Recorded Image
- DaveC426913
- · Replies 6 ·
Undergrad Are Black Holes Truly Infinite in Mass and Energy?
- ph_low
- · Replies 3 ·
Undergrad Why Do Stars Turn Red Giants as They Age?
- orange
- · Replies 3 ·
Graduate Doppler Effect and Harmful Radiation
- orange
- · Replies 2 ·
Graduate Detecting a Gravity Wave: What Kind of Event Could Produce It?
- RandallB
- · Replies 13 ·
Graduate What Makes This Gamma-Ray Burst Even Brighter Than Others?
- meteor
- · Replies 3 ·
Stargazing Solar eclipses, total and annular
- Labguy
- · Replies 6 ·
Graduate How Can Gravity Escape a Black Hole While Light Cannot?
- Gara
- · Replies 12 ·
High School Why does a bight object like the sun have negative magnitude?
- DB
- · Replies 4 ·
Undergrad What Occurs First: Nuclear Fusion or Fission in a Star?
- Rader
- · Replies 10 ·
Undergrad Sending space probes to other planets
- rhia
- · Replies 5 ·
Graduate How Many Orbits Does a Solar Sail Need to Reach the Moon?
- IcedB
- · Replies 9 ·
Congrats to All Gurus - PF Forum Appreciation
- marcus
- · Replies 2 ·
Undergrad Why can you see white through H-alpha filter?
- smithpa9
- · Replies 9 ·
Is Saturn's Surface as Beautiful as it Looks in the Latest Cassini Image?
- s3nn0c
- · Replies 10 ·
Graduate What are the 42 proposed mechanisms for baryogenesis according to this paper?
- meteor
- · Replies 11 ·
Graduate What Type of Finite or Infinite Universe?
- CeeAnne
- · Replies 5 ·
High School Can Aliens Decode Our Messages? M13 Mystery Unveiled!
- nymph
- · Replies 1 ·
Graduate Understanding the Cosmic Quadrupole and Its Impact on CMBR Photons
- Rothiemurchus
- · Replies 12 ·
Undergrad What Would Happen If the Moon Entered Earth's Atmosphere?
- z-component
- · Replies 2 ·
Graduate Relativity & Quantum Field Theory: Explaining Cosmological Constant
- somy
- · Replies 11 ·
Graduate Will the Universe Have a New Beginning?
- wolram
- · Replies 1 ·
Undergrad Inverse Square Law - Is It Valid for Quasars?
- damoclark
- · Replies 8 ·
High School How do nebulas form stars and solar systems?
- DB
- · Replies 9 ·
- Poll
High School Pluto's Planet Status: The Truth About the Ninth Planet of Our Solar System
- Loren Booda
- · Replies 8 ·
Undergrad Kepler's Laws and altitude of orbit
- Ellimist
- · Replies 28 ·
How many papers on arXiv get published
- cosmoboy
- · Replies 1 ·
Graduate What Are the Margins of Error in Calculating the Cosmologic Constant?
- wolram
- · Replies 1 ·
High School Relative Gravity: How Size Affects Force of Gravity
- DB
- · Replies 3 ·
Undergrad Formation of Black Holes from Neutron Stars and White Dwarfs
- alchemist
- · Replies 46 ·