Astronomy, Astrophysics, Cosmology Forum

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 ·
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5

Undergrad Investigating Solar Cycles and Their Effects

  • |2eason
  • · Replies 1 ·
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1

High School Did Comet Machholz Lack a Visible Tail?

  • Physicsisfun2005
  • · Replies 5 ·
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5

The bermuda triangle is a black hole?

  • Sabine
  • · Replies 3 ·
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3

Graduate N-body simulation test with sun, earth and moon

  • Heimdall
  • · Replies 6 ·
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6

Undergrad Big Bang: Causes & Reasons Explained

  • afton
  • · Replies 11 ·
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11

Where are the Best Spots to View the Milky Way in California?

  • Math Is Hard
  • · Replies 5 ·
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5

High School Cause of Gravity: How Does It Work?

  • afton
  • · Replies 8 ·
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8

A Surprising Revelation: The Truth About Asteroids and Earth

  • Tom McCurdy
  • · Replies 1 ·
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1

Graduate Unexplained preference for infinite space.

  • meemoe_uk
  • · Replies 5 ·
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5

Graduate Why do patterns exist in the universe?

  • connect
  • · Replies 6 ·
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6

Undergrad What Will Huygens Discover About Titan's Mysterious Atmosphere?

  • Orion1
  • · Replies 4 ·
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4

Stargazing Is it Possible for All Planets to Line Up?

  • The Bob
  • · Replies 5 ·
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5

Graduate Are Flaws in IMAP Data Affecting Our Understanding of Dark Matter?

  • godzilla7
  • · Replies 2 ·
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2

Undergrad Why Does Venus Rotate Differently?

  • Qyamat
  • · Replies 5 ·
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5

Undergrad Matter or Energy: Which Came First?

  • Qyamat
  • · Replies 2 ·
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2

Graduate Can we be tricked into thinking W=-1

  • wolram
  • · Replies 1 ·
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1

Undergrad What is the concept of concentrated mass?

  • DB
  • · Replies 4 ·
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4

Consensus: Streak in Image an Insect

  • Andromeda321
  • · Replies 2 ·
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2

High School Do Planets Generate Their Own Light?

  • DB
  • · Replies 9 ·
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9

Graduate Idea find black holes using grav. lensing

  • woodysooner
  • · Replies 4 ·
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4

Graduate Amit Goswami's The Self Aware Universe

  • roamer
  • · Replies 4 ·
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4

Graduate Gas Giant Ring Collapse Theory for Rocky Planet Formation

  • Glenn
  • · Replies 1 ·
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1
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1

Graduate Sun's Absolute Velocity: Molecular Measurements & Vacuum Experiments

  • cronxeh
  • · Replies 3 ·
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3

Undergrad Astronomers observe some galaxy

  • Kamataat
  • · Replies 6 ·
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6

Undergrad 10^6 X stronger than Earth¹s lightning: Some of Cassini's findings discussed

  • Ivan Seeking
  • · Replies 1 ·
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1

NOVA special on String/cosmology

  • turbo
  • · Replies 1 ·
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1

What is the Role of Subspace in Sci-Fi Universes?

  • revan
  • · Replies 4 ·
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4

Earth's Abrupt Edge: 4B Year Old Star Encounter Revealed

  • meteor
  • · Replies 1 ·
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1

Graduate What is the motion of a singularity

  • Terry Giblin
  • · Replies 6 ·
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6

High School What is zeeman and stark effects?

  • thephy
  • · Replies 2 ·
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2

Graduate Can Black Holes Compute Universes?

  • chaoszen
  • · Replies 1 ·
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1

Graduate Cosmic Background Radiation & Big Bang

  • celal777
  • · Replies 15 ·
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15

Is There a Clear Explanation for A-Consciousness?

  • RAD4921
  • · Replies 43 ·
2
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43

Did You Spot Any Meteors Tonight?

  • marcus
  • · Replies 7 ·
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7

Graduate Advanced Civilizations Could Make SETI Signal Detection Impossible

  • Ivan Seeking
  • · Replies 17 ·
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17

Graduate Little Black Holes: Dark Matter And Ball Lightning

  • Ivan Seeking
  • · Replies 1 ·
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1

Graduate Is our galaxy in the centre of the universe?

  • wolram
  • · Replies 4 ·
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4

Stargazing Giant Magellan Telescope GMT Announcement

  • meteor
  • · Replies 4 ·
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4

Graduate Mass of Jupiter using as Many moons as Possible

  • walkera
  • · Replies 2 ·
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2

Undergrad The Mystery of H- & HII Ions: Why the Balance Matters

  • goleafsgo113
  • · Replies 2 ·
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2

Graduate Dark Matter Detection: Controversy Grows

  • Chronos
  • · Replies 1 ·
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1

Graduate Could Binary Planetary Systems Exist with Earth-Sized Bodies?

  • Muon12
  • · Replies 22 ·
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22

Graduate Is New Galaxy Formation Possible at the Edge of the Expanding Universe?

  • UrbanXrisis
  • · Replies 26 ·
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26

Graduate Virtual Pairs and the Fate of the Universe

  • Hellburner
  • · Replies 4 ·
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4

Graduate Does Dark Matter's Interaction with Gravity Prevent it from Forming Black Holes?

  • MisterBig
  • · Replies 7 ·
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7

Graduate What Are the Codes for Stellar Astrophysics?

  • Astronuc
  • · Replies 4 ·
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4

Graduate WMAP 2-Year Data: Findings, Delays & Follow-Ups

  • turbo
  • · Replies 10 ·
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10

High School Why does the earth rotate around its

  • Falnom
  • · Replies 3 ·
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3

New comet has brightened to naked-eye visibility

  • turbo
  • · Replies 5 ·
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5

Graduate How are the galactic jets made in black holes?

  • UrbanXrisis
  • · Replies 11 ·
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11

High School Investigating the Effect of the Sun on Tides

  • Rocky_Road
  • · Replies 3 ·
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3

Graduate Does the gravity constant change?

  • Rader
  • · Replies 3 ·
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3

Graduate Could hot dark matter be cold dark matter?

  • Rothiemurchus
  • · Replies 4 ·
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4

Graduate Is Dark Matter Really Necessary for Explaining Galaxy Rotation Curves?

  • marcus
  • · Replies 6 ·
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6

Graduate Why Are White Dwarfs Hot Despite Their High Density?

  • DB
  • · Replies 2 ·
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2

Undergrad What is the relationship between luminosity and magnitude in stars?

  • nobunaga84
  • · Replies 2 ·
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2

Stargazing Telescope or Binoculars: Which Makes a Better Gift?

  • omicron
  • · Replies 10 ·
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10

Graduate ZPE energy levels and cosmology.

  • turbo
  • · Replies 6 ·
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6
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1

Graduate Titanic merger of galaxy clusters revealed

  • meteor
  • · Replies 18 ·
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18

Undergrad Include Sun's Diameter in Star Distance Measurement?

  • DB
  • · Replies 2 ·
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2

Graduate Can White Holes and Hawking Radiation Explain the Big Bang?

  • UrbanXrisis
  • · Replies 28 ·
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28

How to estimate star's mass without gravitation constant?

  • smm
  • · Replies 3 ·
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3

Undergrad Could Mars Bring Deadly Bugs to Earth?

  • Ivan Seeking
  • · Replies 2 ·
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2

Graduate Does Phase Space Explain Entropy?

  • celal777
  • · Replies 5 ·
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5

High School Is Water Essential for Extraterrestrial Life?

  • primal schemer
  • · Replies 11 ·
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11

Graduate Space Expansion from Dark Matter

  • yanniru
  • · Replies 17 ·
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17

Graduate A question in Kepler's second and third laws.

  • pezzang
  • · Replies 11 ·
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11

Incredible Impact Photo: First Ever Recorded Image

  • DaveC426913
  • · Replies 6 ·
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6

Undergrad Are Black Holes Truly Infinite in Mass and Energy?

  • ph_low
  • · Replies 3 ·
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3

Undergrad Why Do Stars Turn Red Giants as They Age?

  • orange
  • · Replies 3 ·
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3

Graduate Doppler Effect and Harmful Radiation

  • orange
  • · Replies 2 ·
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2

Graduate Detecting a Gravity Wave: What Kind of Event Could Produce It?

  • RandallB
  • · Replies 13 ·
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13

Graduate What Makes This Gamma-Ray Burst Even Brighter Than Others?

  • meteor
  • · Replies 3 ·
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3

Stargazing Solar eclipses, total and annular

  • Labguy
  • · Replies 6 ·
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6

Graduate How Can Gravity Escape a Black Hole While Light Cannot?

  • Gara
  • · Replies 12 ·
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12

High School Why does a bight object like the sun have negative magnitude?

  • DB
  • · Replies 4 ·
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4

Undergrad What Occurs First: Nuclear Fusion or Fission in a Star?

  • Rader
  • · Replies 10 ·
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10

Undergrad Sending space probes to other planets

  • rhia
  • · Replies 5 ·
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5

Graduate How Many Orbits Does a Solar Sail Need to Reach the Moon?

  • IcedB
  • · Replies 9 ·
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9

Congrats to All Gurus - PF Forum Appreciation

  • marcus
  • · Replies 2 ·
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2

Undergrad Why can you see white through H-alpha filter?

  • smithpa9
  • · Replies 9 ·
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9
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10

Graduate What are the 42 proposed mechanisms for baryogenesis according to this paper?

  • meteor
  • · Replies 11 ·
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11

Graduate What Type of Finite or Infinite Universe?

  • CeeAnne
  • · Replies 5 ·
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5

High School Can Aliens Decode Our Messages? M13 Mystery Unveiled!

  • nymph
  • · Replies 1 ·
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1

Graduate Understanding the Cosmic Quadrupole and Its Impact on CMBR Photons

  • Rothiemurchus
  • · Replies 12 ·
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12

Undergrad What Would Happen If the Moon Entered Earth's Atmosphere?

  • z-component
  • · Replies 2 ·
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2

Graduate Relativity & Quantum Field Theory: Explaining Cosmological Constant

  • somy
  • · Replies 11 ·
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11

Graduate Will the Universe Have a New Beginning?

  • wolram
  • · Replies 1 ·
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1

Undergrad Inverse Square Law - Is It Valid for Quasars?

  • damoclark
  • · Replies 8 ·
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8

High School How do nebulas form stars and solar systems?

  • DB
  • · Replies 9 ·
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9
  • Poll Poll

High School Pluto's Planet Status: The Truth About the Ninth Planet of Our Solar System

  • Loren Booda
  • · Replies 8 ·
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8

Undergrad Kepler's Laws and altitude of orbit

  • Ellimist
  • · Replies 28 ·
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28

How many papers on arXiv get published

  • cosmoboy
  • · Replies 1 ·
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1

Graduate What Are the Margins of Error in Calculating the Cosmologic Constant?

  • wolram
  • · Replies 1 ·
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1

High School Relative Gravity: How Size Affects Force of Gravity

  • DB
  • · Replies 3 ·
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3

Undergrad Formation of Black Holes from Neutron Stars and White Dwarfs

  • alchemist
  • · Replies 46 ·
2
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46