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

Undergrad Evidence against existence of dark matter?

  • mooberrymarz
  • · Replies 3 ·
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3

High School Space Ship One (SS1): Breaking the Sound Barrier and Making History

  • Orion1
  • · Replies 2 ·
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2

Is Vega visible from Atlanta now?

  • syano
  • · Replies 10 ·
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10

SpaceShipOne reached 100 km this morning

  • marcus
  • · Replies 6 ·
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6

Private Rocket Plane Makes Historic Space Flight

  • Miles
  • · Replies 4 ·
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4

Undergrad Is the Red Shift of Distant Stars Really Due to Cosmic Expansion?

  • jfxjmn
  • · Replies 3 ·
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3

High School If the Earth was a giant metal cube..

  • smithpa9
  • · Replies 8 ·
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8

Graduate Nonspecialist qstns:ie, massless=no space?

  • mercmisfire
  • · Replies 1 ·
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1

High School What is the nearest supernova candidate (maybe Betelguese?)

  • RAD4921
  • · Replies 4 ·
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4

Graduate How gravity arises from spacetime curvature?

  • weio
  • · Replies 29 ·
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29

High School What was the bright flash I saw in the sky last night?

  • check
  • · Replies 6 ·
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6

Graduate What happens to a star in orbit around a black hole?

  • force5
  • · Replies 5 ·
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5

Undergrad Extra-solar Planets : Mass vs. Orbital Distance

  • Janus
  • · Replies 6 ·
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6

Undergrad Sedna's Orbit: How Gravity Keeps it Tied to Our Solar System

  • Echo 6 Sierra
  • · Replies 9 ·
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9

Graduate Intergalactic doldrums - flotsam and jetsam

  • Loren Booda
  • · Replies 9 ·
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9

High School Understanding Binary Stars: Types and Definitions

  • nautica
  • · Replies 6 ·
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6

Undergrad Are there advantages to launching space missions from the Arctic/North Pole?

  • Arctic Fox
  • · Replies 9 ·
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9

High School Universe Expansion: How Space is Created

  • decibel
  • · Replies 5 ·
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5

Graduate Move something about the size of the ISS

  • MonstersFromTheId
  • · Replies 8 ·
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8

High School Universe Ingredients: What Makes Up Our Universe?

  • wolram
  • · Replies 3 ·
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3

Graduate Is Spacetime a Dynamic Entity Influenced by Motion and Antimatter?

  • Antonio Lao
  • · Replies 5 ·
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5

Graduate Can the Space-Buoy Determine Universal Rest in a Relativistic Inertial Frame?

  • ram1024
  • · Replies 22 ·
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22

Graduate Is Cosmos Homogeneous, Isotropic ?

  • Antonio Lao
  • · Replies 8 ·
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8

Graduate Is the Universe Bound by the Laws of Conservation?

  • Mikado
  • · Replies 3 ·
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3

Kerry's vision for the space program

  • Phobos
  • · Replies 1 ·
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1

Undergrad G.warming: something to wobble about

  • scott_sieger
  • · Replies 10 ·
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10

Graduate Is Quantizing Spacetime Possible According to the 2nd Law of Thermodynamics?

  • Antonio Lao
  • · Replies 25 ·
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25

Graduate Universe as a simple harmonic oscillator

  • kurious
  • · Replies 1 ·
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1

Graduate Can Time and Space has Duality ?

  • Antonio Lao
  • · Replies 2 ·
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2

Whatever happened to the Mars rovers?

  • Loren Booda
  • · Replies 4 ·
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4

Graduate Two Big Bang Theory Vs Other Theories

  • Riverrobert
  • · Replies 9 ·
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9
  • Poll Poll

Undergrad Evaluate my brand new program satelite motion around earth

  • devil
  • · Replies 5 ·
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5

Undergrad Challenges of Life on Extra-Solar Planets: A Review of Latest Findings

  • nautica
  • · Replies 2 ·
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2

High School Venus Transit: Why Does It Look Like It Changes Direction?

  • waynet
  • · Replies 7 ·
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7

Graduate Can Zero Point Energy Explain the Cyclical Universe?

  • sol2
  • · Replies 1 ·
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1

Graduate Shapiro Effect and Gravitational Lensing

  • shrumeo
  • · Replies 6 ·
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6

Graduate Gravity and Energy Conservation in Stars: Understanding Gravitational Collapse

  • bootsam
  • · Replies 1 ·
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1

High School How much fuel does cassini have on board?

  • fbsthreads
  • · Replies 2 ·
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2

High School Help Distance between Mu Leporis & Nihal?

  • MonstersFromTheId
  • · Replies 9 ·
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9

Graduate Can We ever Hear Gravity's Music ?

  • Antonio Lao
  • · Replies 8 ·
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8

Undergrad Exploring Conflicting Age Views: Universe & Earth in Religion vs. Physics

  • Tom McCurdy
  • · Replies 8 ·
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8

Undergrad Transit of Venus mathematics please.

  • Adrian Baker
  • · Replies 2 ·
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2

Graduate How important/fundamental is self-similarity in cosmic structure?

  • setAI
  • · Replies 3 ·
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3

Undergrad Voyager: How Did They Navigate Unknown Worlds?

  • one_raven
  • · Replies 7 ·
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7

Undergrad How Does Gravity and Center Influence Orbit in Astro-Physics?

  • Moonrat
  • · Replies 8 ·
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8

Graduate Detailed Mass-Luminosity Relation for Main Sequence Stars

  • Jenab
  • · Replies 12 ·
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12

Graduate Oscillating universe and harmonic oscillator

  • kurious
  • · Replies 2 ·
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2

Graduate Did a Pre-Big Bang Species Cause the Big Bang Theory?

  • Plagosus
  • · Replies 8 ·
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8

Graduate PARALLEL WORLDS to hit shelves in OCT.

  • Ebe
  • · Replies 4 ·
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4

Graduate Mars Exploration-is Human Settlement Possible?

  • Dr. Raj Baldev
  • · Replies 18 ·
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18

Undergrad Odd Black Hole Defies Explanation : space.com

  • Ivan Seeking
  • · Replies 3 ·
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3

Undergrad Most complex extraterrestrial molecule

  • Loren Booda
  • · Replies 10 ·
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10

Undergrad Temp increase of sun from photosphere to corona

  • nautica
  • · Replies 5 ·
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5

Graduate Red Shift caused by space itself ?

  • nigel johnstone
  • · Replies 2 ·
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2

Graduate Calculating Minimum Distance between Elliptical Orbits | Orbital Distance Forum

  • Coelum
  • · Replies 2 ·
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2

Transit of Venus - Witnessed by Excited Friends on a Hazy Day

  • Tom McCurdy
  • · Replies 4 ·
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4
  • Poll Poll

Stargazing What's Happening for the June 8th Eclipse of Venus?

  • Mark
  • · Replies 28 ·
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28

Conjunction of Venus and Sun a rare event

  • Kerrie
  • · Replies 10 ·
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10

Graduate How Did Time Begin After the Big Bang?

  • europium
  • · Replies 10 ·
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10

Graduate Question-can a neutron star shed mass?

  • Duane M
  • · Replies 3 ·
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3

Graduate Universe's Energy Creation and Big Bang: 4 Questions Answered

  • Pattielli
  • · Replies 4 ·
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4

Graduate Modeling a Star: Struggling with Newton-Raphson Technique

  • mccizmt2
  • · Replies 1 ·
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1

High School What periodic motion is used as a reference

  • Lindseynh
  • · Replies 1 ·
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1

Graduate Cosmology: Expansion & Redshift Explained

  • Alamino
  • · Replies 10 ·
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10

Graduate Is Our Understanding of Gravity and Entropy Incomplete?

  • Chronos
  • · Replies 1 ·
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1

Graduate What happened Before the Big Bang

  • Filter
  • · Replies 11 ·
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11

Graduate Orientation of virtual particle pairs in local fields?

  • turbo
  • · Replies 6 ·
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6

Graduate Does Zero Point Energy Influence Gravitational Effects in Space?

  • techwonder
  • · Replies 15 ·
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15

Graduate Size of universe and uncertainty principle

  • kurious
  • · Replies 7 ·
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7

High School How fast is earth moving trough space?

  • tumor
  • · Replies 3 ·
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3

Undergrad Where can I find comprehensive formulas for Celestial Mechanics?

  • Ravine
  • · Replies 9 ·
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9

High School Why do all the planets orbit the sun?

  • repugno
  • · Replies 18 ·
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18

Undergrad How Do I Convert the Gravitational Constant to Pixels?

  • devil
  • · Replies 1 ·
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1

Graduate Analogous Hawking Radiation from Astrophysical Black Hole Accretion

  • 25
  • · Replies 4 ·
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4

Graduate Can Dark Energy Influence the Minimum Unit of Space in the Universe?

  • kurious
  • · Replies 4 ·
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4

Undergrad Dual Planetary Life: Is It Possible?

  • Nibles
  • · Replies 11 ·
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11

High School Can an Asteroid Really Destroy Earth in 800 Years?

  • Razi Abid
  • · Replies 8 ·
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8

Graduate How the calculated total velocity derived ?

  • Venus50
  • · Replies 4 ·
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4

Undergrad Redshift & Expansion: What Else Is There?

  • shrumeo
  • · Replies 32 ·
2
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32

Undergrad A simple explination of why clocks move faster in space

  • Mad_Gouki
  • · Replies 19 ·
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19

Stargazing Spitzer Telescope spies 'youngest' planet

  • pelastration
  • · Replies 2 ·
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2

Graduate What happens when you turn on the light in a simple thought experiment?

  • force5
  • · Replies 10 ·
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10

Undergrad What Would a Martian Calendar Look Like for Well-Established Colonies?

  • MonstersFromTheId
  • · Replies 5 ·
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5

High School Predict Clear Skies: Easy Ways to Forecast Stargazing Nights

  • Eh
  • · Replies 6 ·
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6

Graduate Superconductive Planck/Scale Space

  • PFanalog57
  • · Replies 4 ·
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4

Undergrad Calculate the gravitational field of a object

  • taylordnz
  • · Replies 2 ·
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2

High School When will the Stars Die Out? - What Makes It?

  • Nec
  • · Replies 3 ·
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3

Graduate Have Cosmologists Determined the Total Mass of the Universe?

  • Antonio Lao
  • · Replies 20 ·
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20

Undergrad What are the Characteristics of Short Gamma Ray Bursts?

  • cangus
  • · Replies 13 ·
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13

Graduate Entering the Sphere of Influence

  • Venus50
  • · Replies 2 ·
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2

Graduate Investigating Anomalous Acceleration of Pioneer 10

  • kurious
  • · Replies 14 ·
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14

Graduate And the question remains, is our Universe really a Hologram?

  • startic84
  • · Replies 2 ·
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2

Undergrad Understanding Galaxy Formation and the Factors Influencing Their Size

  • Vast
  • · Replies 3 ·
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3

Graduate Virtual particles and cosmological expansion

  • turbo
  • · Replies 8 ·
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8

Undergrad Looking for a *3D navigable* star map.

  • MonstersFromTheId
  • · Replies 8 ·
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8

Technical name for the moon is Irene

  • numberPI
  • · Replies 5 ·
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5

Undergrad How Can I Simulate a Star Collision on a Computer?

  • Pattielli
  • · Replies 2 ·
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2

Compatibility of Orion Solar Filter for Celestron 60 AZ Model

  • Dagenais
  • · Replies 3 ·
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3

Graduate Can the Hubble Expansion Explain the Mechanism of Gravity?

  • darkbob5150
  • · Replies 53 ·
2
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53

Undergrad Neutron stars seem an oddity to me

  • wolram
  • · Replies 7 ·
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7