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

Which Nebula is Your Favorite Astronomy Photo?

  • Greg Bernhardt
  • · Replies 4 ·
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4

Undergrad Is Our Universe Just a Giant Black Hole in an Infinite Cycle?

  • Owl
  • · Replies 25 ·
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25

Graduate Can a Star be Too Big to be Detected?

  • Shirley
  • · Replies 15 ·
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15

High School Unlimited Universe: Debunking Theories of a Warped Universe

  • zydubion
  • · Replies 21 ·
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21

Graduate Is Space and Time Discrete According to Eugene Savov's Theory of Interaction?

  • clicky
  • · Replies 8 ·
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8

Graduate The finite bang fallacy rears its head again

  • marcus
  • · Replies 18 ·
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18

Graduate The Universe's Blackbody Spectrum: Why is it Troublesome?

  • Astronomer107
  • · Replies 2 ·
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2

Graduate Is Antimatter Missing Because It Traveled Back in Time?

  • FZ+
  • · Replies 16 ·
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16

Graduate Another B.Forums blooper: It grows at the speed of light

  • marcus
  • · Replies 6 ·
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6

Graduate Glitter, Balloons and Jell-O, a model of the Universe.

  • nuke_c
  • · Replies 10 ·
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10

Humble Hubble a star that will not fade

  • Ivan Seeking
  • · Replies 8 ·
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8

Graduate Are Wet, Rocky Planets Common in the Universe?

  • marcus
  • · Replies 2 ·
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2

Graduate Did Space Have Properties Before the Big Bang?

  • wolram
  • · Replies 57 ·
2
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57

Graduate Why Do Smaller Black Holes Have Higher Temperatures?

  • Tail
  • · Replies 82 ·
3
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82

Could human beings accept thier place in the universes?

  • Zantra
  • · Replies 20 ·
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20

Graduate Background Radiation & Neutrino Questions

  • Nim
  • · Replies 20 ·
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20

High School Understanding the Rarity of Elements in the Universe

  • Nim
  • · Replies 1 ·
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1

Undergrad Does the universe specify a mass limit?

  • SamBuckler
  • · Replies 6 ·
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6

Graduate Possibility of a Conscious Universe: Proving Life and Awareness

  • M. Gaspar
  • · Replies 299 ·
10
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299

Graduate The Rings of Earth: Tidal Interactions Between Earth, Moon, & Sun

  • Janus
  • · Replies 24 ·
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24

Undergrad Moon Derives From Earth, Space Object, Study Says: Nat' Geographic.com

  • Ivan Seeking
  • · Replies 1 ·
Replies
1

Mars at its Closest: Separating Science from Entertainment

  • Gale
  • · Replies 9 ·
Replies
9
  • Poll Poll

How should we retire the Hubble?

  • Phobos
  • · Replies 11 ·
Replies
11

Dealing with Humidity While Stargazing: Is It Worth It?

  • kleinma
  • · Replies 5 ·
Replies
5

Graduate Breaking Space: Can Tiny Loops Reach Their Breaking Point?

  • meteor
  • · Replies 12 ·
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12
  • Poll Poll

Graduate How much entropy is in the universe?

  • marcus
  • · Replies 10 ·
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10

Graduate Black Holes & Fermi exclusion principle

  • Kalimaa23
  • · Replies 3 ·
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3

Undergrad 2 Black Holes: What Would Happen?

  • hell18
  • · Replies 2 ·
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2

Graduate Universe began at a singualrity at the big bang

  • photon
  • · Replies 11 ·
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11

Graduate Spacetime has no physical existence

  • marcus
  • · Replies 7 ·
Replies
7
  • Poll Poll

How would you rate your area as a star gazing spot?

  • Shadow
  • · Replies 24 ·
Replies
24

Undergrad Doughnut shaped Universe: Valid or Just Sugar-coated?

  • Devilin
  • · Replies 13 ·
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13

Undergrad Gravitational effect on planets when

  • Hyperreality
  • · Replies 7 ·
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7

Graduate Squashed Star Flattens Solar Theory

  • subtillioN
  • · Replies 46 ·
2
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46

Graduate What is the Evidence for Dark Energy on Small Scales?

  • Brad_Ad23
  • · Replies 2 ·
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2

New players needed in Astronomy gamethread

  • marcus
  • · Replies 1 ·
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1

Americans still positive about space program

  • Phobos
  • · Replies 4 ·
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4
  • Poll Poll

Graduate Picturing the history of the world's expansion

  • marcus
  • · Replies 5 ·
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5

Graduate New Theory: Catastrophe Created Mars' Moons: Space.com

  • Ivan Seeking
  • · Replies 2 ·
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2

Strange Spots on Mars: Space.com

  • Ivan Seeking
  • · Replies 3 ·
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3

Undergrad Einstein's Cosmological Constant

  • Finger Painter
  • · Replies 5 ·
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5
  • Poll Poll

How you picture the expansion of space.

  • marcus
  • · Replies 19 ·
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19
  • Poll Poll

High School What is Dark Energy: The Most Common Type of Energy in the Universe

  • meteor
  • · Replies 8 ·
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8

Graduate Evidence for a finite universe

  • Eh
  • · Replies 2 ·
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2

Undergrad Martian warm spots could be towers of ice: Newscientists.com

  • Ivan Seeking
  • · Replies 1 ·
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1
  • Poll Poll

Your picture of universe's timeline

  • marcus
  • · Replies 17 ·
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17

Undergrad Exploring the Similarities and Differences between Black Holes and Black Bodies

  • vedder
  • · Replies 2 ·
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2

Shuttle Launch Leader: Who Is It?

  • Astronomer107
  • · Replies 3 ·
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3

Graduate How can the universe exist without time?

  • Zantra
  • · Replies 44 ·
2
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44

Undergrad Gravity Collapse on Planets: Physicists' Perspective

  • Hyperreality
  • · Replies 2 ·
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2

Graduate The beginning/end of the universe

  • myok
  • · Replies 12 ·
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12

Undergrad What Are the Key Gravitational and Nuclear Effects in a Star's Life Cycle?

  • Bunting
  • · Replies 4 ·
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4

High School What unit is used to measure volume in space?

  • Chen
  • · Replies 1 ·
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1

Undergrad Asteroid hazard revised: Nature.com

  • Ivan Seeking
  • · Replies 5 ·
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5

Undergrad Calculating the Size of the Universe

  • Mattius_
  • · Replies 21 ·
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21

Graduate How Do Gravity Anomalies Affect Earth's Shape?

  • Ivan Seeking
  • · Replies 2 ·
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2

High School Does the Cosmological Constant Exist?

  • newton1
  • · Replies 15 ·
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15

High School Newfound Stars are Huge, Powerful and Frantic: Space.com

  • Ivan Seeking
  • · Replies 1 ·
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1

Graduate J1148+5251 is the most distant object known

  • meteor
  • · Replies 5 ·
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5

Uncovering the Mystery of a 12.8 Billion Year Old Planet

  • quantumcarl
  • · Replies 25 ·
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25

Graduate Brief perspective on notion of the big bang

  • marcus
  • · Replies 19 ·
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19

Graduate On the topic of curved spacetimes

  • Brad_Ad23
  • · Replies 6 ·
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6

Discover the Mind-Blowing Count of 70 Sextillion Stars in the Universe

  • Phobos
  • · Replies 8 ·
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8

High School Distance of a Supernova Candidate from Earth: Is it Safe?

  • Doctor Luz
  • · Replies 1 ·
Replies
1

Graduate Curved Space: Understanding the Concept of Twisting in Physics

  • mitch bass
  • · Replies 31 ·
2
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31

Graduate Uncovering the Origins of the Universe: Insights from the Big Bang Singularity

  • MathematicalPhysicist
  • · Replies 11 ·
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11

Graduate Unveiling the Mysteries of Dark Objects

  • Tyger
  • · Replies 4 ·
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4

Many universes like there are solar systems in a galaxy

  • sheldon
  • · Replies 7 ·
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7

Graduate Is Gravity Caused by the Motion of Particles in the Fabric of Space?

  • Nigel
  • · Replies 463 ·
16
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463

Undergrad Questions About Nebulas & Protostars - Get Answers Now

  • maximus
  • · Replies 1 ·
Replies
1

Undergrad After Big Bang: Hydrogen & Helium Formed, But Why Didn't They Burn?

  • Einstein
  • · Replies 6 ·
Replies
6

The Moon's Impact on Earth: More Than Just a Source of Myths?

  • Saint
  • · Replies 13 ·
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13

Graduate Lineweaver(May 2003)-web's best cosmology tutorial

  • marcus
  • · Replies 6 ·
Replies
6

Graduate Time zero glitch fades out/less need for inflation

  • marcus
  • · Replies 7 ·
Replies
7

Graduate Searching for a string explanation

  • mitch bass
  • · Replies 108 ·
4
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108
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1

Graduate What is our actual Hubble speed ?

  • Imagine
  • · Replies 18 ·
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18

Graduate What is Our Actual Hubble Speed and How Does it Relate to CMB?

  • marcus
  • · Replies 6 ·
Replies
6

High School What Lies at the Center of the Universe?

  • The Grimmus
  • · Replies 291 ·
10
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291

Undergrad Does Gravity Affect Light in Stars?

  • Shirley
  • · Replies 12 ·
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12

High School Why do we only see one side of the moon?

  • Azrioch
  • · Replies 65 ·
3
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65

Graduate Why is inflation thought necessary in std. cosm.?

  • marcus
  • · Replies 18 ·
Replies
18

Undergrad Gravity and Rotation: Understanding the Influence of Speed on Planetary Force

  • mitch bass
  • · Replies 7 ·
Replies
7

Graduate What makes a flat, finite universe seem unfeasible?

  • Hurkyl
  • · Replies 8 ·
Replies
8

Graduate What question can we ask about Hubble constant measurement?

  • Imagine
  • · Replies 15 ·
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15

Graduate Before the Big Bang: The Leading Theory on the Birth of the Universe

  • kleinma
  • · Replies 15 ·
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15

Graduate Much of our understanding of the physics of AGN

  • wolram
  • · Replies 1 ·
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1

High School Can Anyone Explain the Hertzsprung-Russell Diagram?

  • aidan
  • · Replies 1 ·
Replies
1

Graduate Why Is Understanding Curved Space Essential for Astronomy?

  • Hurkyl
  • · Replies 24 ·
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24

Undergrad Number of Galaxies: Is It Infinite?

  • meteor
  • · Replies 74 ·
3
Replies
74

Graduate Is the Universe Really Not Expanding?

  • wolram
  • · Replies 46 ·
2
Replies
46

Undergrad Can a Solar System Exist Without a Central Star?

  • The Grimmus
  • · Replies 11 ·
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11

Mars-56million km closer to earth

  • Draco
  • · Replies 3 ·
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3

Graduate Vipers amazing nicked ideas on the universe

  • Viper
  • · Replies 4 ·
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4

High School Orion's XT8 8 Dobsonian as a good beginner scope

  • kleinma
  • · Replies 27 ·
Replies
27

Graduate Understanding Solar Sails: The Physics Behind the Poofing Effect

  • drag
  • · Replies 35 ·
2
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35

Graduate How Does Quantum Probability Affect Discrete Space in Loop Quantum Gravity?

  • Eh
  • · Replies 2 ·
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2

Undergrad Absolute 0 at the before the begging

  • The Grimmus
  • · Replies 6 ·
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6

Graduate Falling Object at c: Relativistic Position Expression for the Attracted Object

  • Imagine
  • · Replies 5 ·
Replies
5

High School How Will Our Solar System End

  • The Grimmus
  • · Replies 12 ·
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12