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Astronomy and Astrophysics Forum

Join in expert discussion on the topics of Astronomy and astrophysics. This may include discussion on celestial objects, space, and the physical universe as a whole. Mainstream science only.

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What Does Wave Rating Mean in Telescope Mirrors?

Sep 17, 2003 · Replies 3 · Sep 29, 2003

Replies: 3

Views: 5K

Schrodingers Equation in 3 space Dimension

Sep 28, 2003 · Replies 5 · Sep 29, 2003

Replies: 5

Views: 4K

The Closest Gas Giant: Why is Jupiter so Big?

Sep 25, 2003 · Replies 12 · Sep 29, 2003

Replies: 12

Views: 5K

Probability over space or time in spacetime

Sep 23, 2003 · Replies 1 · Sep 28, 2003

Replies: 1

Views: 3K

Endless geodesics in closed spacetime

Sep 25, 2003 · Replies 1 · Sep 28, 2003

Replies: 1

Views: 3K

Luminosity, Flux, Time: What Do They Mean?

Sep 28, 2003 · Replies 1 · Sep 28, 2003

Replies: 1

Views: 5K

Pluto Mission Revived by Planetary Society & Others

Sep 25, 2003 · Replies 3 · Sep 28, 2003

Replies: 3

Views: 3K

Dwarfs: Where Does Their Energy Come From?

Sep 28, 2003 · Replies 4 · Sep 28, 2003

Replies: 4

Views: 3K

Tidal Forces at Work Between Large & Small Magellanic Clouds?

Sep 7, 2003 · Replies 4 · Sep 27, 2003

Replies: 4

Views: 4K

New Formulas for Understanding the Universal Gravitational Constant, G

Aug 29, 2003 · Replies 3 · Sep 27, 2003

Replies: 3

Views: 3K

How efficient are we at detecting near Earth objects?

Sep 25, 2003 · Replies 1 · Sep 27, 2003

Replies: 1

Views: 3K

What is Gravitational Radiation and How Does it Affect Orbital Speed in Pulsars?

Sep 24, 2003 · Replies 2 · Sep 24, 2003

Replies: 2

Views: 3K

Deorbiting: Possibility and Explanation

Sep 23, 2003 · Replies 7 · Sep 24, 2003

Replies: 7

Views: 4K

Call to extend [mainstream] alien life search: BBC

Sep 17, 2003 · Replies 4 · Sep 24, 2003

Replies: 4

Views: 4K

The Big Bang: Explaining the Unfathomable

Jul 29, 2003 · Replies 17 · Sep 23, 2003

Replies: 17

Views: 6K

Goodbye, Galileo: NASA's Historic Jupiter Mission Comes to an End

Sep 22, 2003 · Replies 1 · Sep 22, 2003

Replies: 1

Views: 3K

Is Earth Expansion a New Cosmology Case?

Sep 21, 2003 · Replies 3 · Sep 22, 2003

Replies: 3

Views: 3K

New On-line Cosmology Calculator

Sep 21, 2003 · Replies 1 · Sep 21, 2003

Replies: 1

Views: 5K

What Happens When Galileo Crashes into Jupiter?

Sep 19, 2003 · Replies 1 · Sep 20, 2003

Replies: 1

Views: 4K

Giant star caught swallowing three planets: Newscientist.com

Sep 18, 2003 · Replies 1 · Sep 18, 2003

Replies: 1

Views: 4K

Are Superluminal Recession Velocities Consistent with Special Relativity?

Aug 24, 2003 · Replies 4 · Sep 17, 2003

Replies: 4

Views: 5K

Jupiter probe nears fiery end: BBC

Sep 17, 2003 · Replies 1 · Sep 17, 2003

Replies: 1

Views: 3K

Recommendation about Celestial Mechanics

Sep 17, 2003 · Replies 2 · Sep 17, 2003

Replies: 2

Views: 5K

A SPACE ODDITY? Strange Kansas City marker part of world-wide mystery

Sep 9, 2003 · Replies 3 · Sep 17, 2003

Replies: 3

Views: 3K

Escape velocity and formulas for circular orbits

Sep 16, 2003 · Replies 2 · Sep 16, 2003

Replies: 2

Views: 5K

Angular momentum, torque and eccentricity

Sep 16, 2003 · Replies 1 · Sep 16, 2003

Replies: 1

Views: 7K

Is the Cosmological Constant a Result of Spacetime's Tendency to Be Flat?

Sep 16, 2003 · Replies 4 · Sep 16, 2003

Replies: 4

Views: 5K

Why Do People Find Joy in Stargazing and Astronomy?

Sep 11, 2003 · Replies 5 · Sep 16, 2003

Replies: 5

Views: 4K

What manner of nonsense is this?

Sep 11, 2003 · Replies 17 · Sep 16, 2003

Replies: 17

Views: 5K

Is There Shade in Outer Space?

Sep 9, 2003 · Replies 27 · Sep 15, 2003

Replies: 27

Views: 7K

Is Dark Matter Energy Lost from Redshifted Radiation?

Sep 13, 2003 · Replies 1 · Sep 14, 2003

Replies: 1

Views: 3K

Who contributed to Astronomy most?

Sep 5, 2003 · Replies 1 · Sep 13, 2003

Replies: 1

Views: 2K

How Do Astronomers Accurately Count Stars in the Universe?

Sep 12, 2003 · Replies 5 · Sep 12, 2003

Replies: 5

Views: 6K

Can a Vacuum Pump Simulate Planetary Orbits?

Sep 5, 2003 · Replies 11 · Sep 12, 2003

Replies: 11

Views: 6K

Is the Big Bang Theory Flawed?

Sep 10, 2003 · Replies 6 · Sep 12, 2003

Replies: 6

Views: 6K

Is the Universe Really 30 Billion Light Years Across?

Sep 11, 2003 · Replies 2 · Sep 12, 2003

Replies: 2

Views: 7K

Half-Light Radius: Definition & Galaxy Merging

Sep 11, 2003 · Replies 1 · Sep 11, 2003

Replies: 1

Views: 7K

Where to Find Celestial Objects Visible from Light Polluted Areas

Aug 28, 2003 · Replies 3 · Sep 11, 2003

Replies: 3

Views: 3K

Supermassive Black Hole Sings for Its Supper: Scientific American

Sep 10, 2003 · Replies 3 · Sep 11, 2003

Replies: 3

Views: 4K

What Are the True Properties of Space Beyond a Vacuum?

Jun 14, 2003 · Replies 25 · Sep 10, 2003

Replies: 25

Views: 5K

Kepler's 2nd Law: Relation of dA/dt to L

Sep 9, 2003 · Replies 4 · Sep 10, 2003

Replies: 4

Views: 8K

Asteroid danger in 2014 downplayed: BBC

Sep 2, 2003 · Replies 3 · Sep 10, 2003

Replies: 3

Views: 4K

Universe turned inside out at time zero

Sep 5, 2003 · Replies 17 · Sep 9, 2003

Replies: 17

Views: 5K

Mars' Lumpy Landforms: Space.com pic

Sep 3, 2003 · Replies 6 · Sep 8, 2003

Replies: 6

Views: 4K

Evidence of Hawking Radiation: What We Know

Sep 3, 2003 · Replies 18 · Sep 6, 2003

Replies: 18

Views: 4K

Chances of a catastrophic collision

Sep 2, 2003 · Replies 4 · Sep 3, 2003

Replies: 4

Views: 3K

Tragedy in Brazil's new space program

Aug 25, 2003 · Replies 5 · Sep 2, 2003

Replies: 5

Views: 4K

What is the relationship between inflation and the beginning of the universe?

Aug 31, 2003 · Replies 6 · Sep 2, 2003

Replies: 6

Views: 3K

Explaination of the universe is generaly excepted

Aug 28, 2003 · Replies 8 · Sep 2, 2003

Replies: 8

Views: 7K

Is a Universe with a Center More Plausible?

Aug 31, 2003 · Replies 3 · Sep 2, 2003

Replies: 3

Views: 3K

Doppler shift and red/blue shift

Sep 1, 2003 · Replies 4 · Sep 2, 2003

Replies: 4

Views: 11K

Most things in our universe have rotation

Aug 30, 2003 · Replies 16 · Sep 1, 2003

Replies: 16

Views: 4K

What is the best and safest way to view the sun through a telescope?

Aug 28, 2003 · Replies 4 · Aug 31, 2003

Replies: 4

Views: 6K

What is the concept of a Meridian Circle?

Aug 25, 2003 · Replies 7 · Aug 31, 2003

Replies: 7

Views: 4K

Evidence for the Existence of Black Holes: Is There Room for Debate?

Aug 28, 2003 · Replies 16 · Aug 31, 2003

Replies: 16

Views: 4K

Gravity & Spacetime: How Mass/Energy Affects It

Aug 27, 2003 · Replies 22 · Aug 30, 2003

Replies: 22

Views: 5K

High School Astronomy Classes: A Look at Availability

Aug 30, 2003 · Replies 1 · Aug 30, 2003

Replies: 1

Views: 2K

Is the Universe Ruled by a Simple Algorithm?

Aug 11, 2003 · Replies 19 · Aug 30, 2003

Replies: 19

Views: 4K

Round One: Big Bang vs. Little Bang

Aug 29, 2003 · Replies 4 · Aug 30, 2003

Replies: 4

Views: 6K

Stargazing Star of David and Total Lunar Eclipse

Aug 24, 2003 · Replies 4 · Aug 30, 2003

Replies: 4

Views: 8K

Discover the Power of Quantum Haiku in the Sun's Proton-Proton Chain Reaction

Aug 29, 2003 · Replies 2 · Aug 29, 2003

Replies: 2

Views: 3K

Night Sky Watching: The International Space Station

Aug 28, 2003 · Replies 1 · Aug 28, 2003

Replies: 1

Views: 6K

Which Nebula is Your Favorite Astronomy Photo?

Jul 31, 2003 · Replies 4 · Aug 27, 2003

Replies: 4

Views: 3K

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

Aug 22, 2003 · Replies 25 · Aug 27, 2003

Replies: 25

Views: 5K

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

Aug 24, 2003 · Replies 8 · Aug 26, 2003

Replies: 8

Views: 4K

The finite bang fallacy rears its head again

Aug 24, 2003 · Replies 18 · Aug 25, 2003

Replies: 18

Views: 4K

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

Aug 24, 2003 · Replies 6 · Aug 24, 2003

Replies: 6

Views: 3K

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

Aug 19, 2003 · Replies 10 · Aug 24, 2003

Replies: 10

Views: 5K

Humble Hubble a star that will not fade

Aug 22, 2003 · Replies 8 · Aug 24, 2003

Replies: 8

Views: 3K

Are Wet, Rocky Planets Common in the Universe?

Aug 23, 2003 · Replies 2 · Aug 24, 2003

Replies: 2

Views: 3K

Did Space Have Properties Before the Big Bang?

Jul 30, 2003 · Replies 57 · Aug 23, 2003

2

Replies: 57

Views: 7K

Why Do Smaller Black Holes Have Higher Temperatures?

Aug 5, 2003 · Replies 82 · Aug 23, 2003

3

Replies: 82

Views: 11K

Background Radiation & Neutrino Questions

Aug 17, 2003 · Replies 20 · Aug 22, 2003

Replies: 20

Views: 6K

Understanding the Rarity of Elements in the Universe

Aug 21, 2003 · Replies 1 · Aug 21, 2003

Replies: 1

Views: 5K

Does the universe specify a mass limit?

Aug 11, 2003 · Replies 6 · Aug 21, 2003

Replies: 6

Views: 3K

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

Aug 3, 2003 · Replies 24 · Aug 19, 2003

Replies: 24

Views: 5K

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

Aug 13, 2003 · Replies 1 · Aug 19, 2003

Replies: 1

Views: 3K

Mars at its Closest: Separating Science from Entertainment

Aug 13, 2003 · Replies 9 · Aug 18, 2003

Replies: 9

Views: 12K

Poll

How should we retire the Hubble?

Aug 11, 2003 · Replies 11 · Aug 18, 2003

Replies: 11

Views: 4K

Dealing with Humidity While Stargazing: Is It Worth It?

Aug 14, 2003 · Replies 5 · Aug 18, 2003

Replies: 5

Views: 4K

Breaking Space: Can Tiny Loops Reach Their Breaking Point?

Aug 6, 2003 · Replies 12 · Aug 17, 2003

Replies: 12

Views: 3K

Poll

How much entropy is in the universe?

Aug 2, 2003 · Replies 10 · Aug 17, 2003

Replies: 10

Views: 6K

Spacetime has no physical existence

Aug 8, 2003 · Replies 7 · Aug 10, 2003

Replies: 7

Views: 4K

Poll

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

Jul 28, 2003 · Replies 24 · Aug 9, 2003

Replies: 24

Views: 4K

What is the Evidence for Dark Energy on Small Scales?

Aug 5, 2003 · Replies 2 · Aug 5, 2003

Replies: 2

Views: 3K

New players needed in Astronomy gamethread

Aug 4, 2003 · Replies 1 · Aug 5, 2003

Replies: 1

Views: 3K

Americans still positive about space program

Jul 28, 2003 · Replies 4 · Aug 4, 2003

Replies: 4

Views: 3K

Poll

Picturing the history of the world's expansion

Aug 2, 2003 · Replies 5 · Aug 4, 2003

Replies: 5

Views: 5K

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

Jul 31, 2003 · Replies 2 · Aug 4, 2003

Replies: 2

Views: 4K

Strange Spots on Mars: Space.com

Aug 1, 2003 · Replies 3 · Aug 4, 2003

Replies: 3

Views: 4K

Poll

How you picture the expansion of space.

Jul 24, 2003 · Replies 19 · Aug 3, 2003

Replies: 19

Views: 4K

Poll

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

Jul 29, 2003 · Replies 8 · Aug 2, 2003

Replies: 8

Views: 4K

Evidence for a finite universe

Aug 2, 2003 · Replies 2 · Aug 2, 2003

Replies: 2

Views: 4K

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

Jul 30, 2003 · Replies 1 · Aug 1, 2003

Replies: 1

Views: 3K

Poll

Your picture of universe's timeline

Jul 24, 2003 · Replies 17 · Aug 1, 2003

Replies: 17

Views: 6K

Exploring the Similarities and Differences between Black Holes and Black Bodies

Jul 30, 2003 · Replies 2 · Jul 31, 2003

Replies: 2

Views: 8K

Shuttle Launch Leader: Who Is It?

Jul 30, 2003 · Replies 3 · Jul 31, 2003

Replies: 3

Views: 3K

The beginning/end of the universe

Jul 23, 2003 · Replies 12 · Jul 29, 2003

Replies: 12

Views: 5K

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

Jul 27, 2003 · Replies 4 · Jul 29, 2003

Replies: 4

Views: 3K

What unit is used to measure volume in space?

Jul 28, 2003 · Replies 1 · Jul 29, 2003

Replies: 1

Views: 4K

Astronomy

Astronomy is the scientific study of celestial objects and phenomena beyond Earth's atmosphere. It encompasses the observation and analysis of stars, planets, galaxies, and other celestial bodies, as well as the broader exploration of the universe's origins, structure, and evolution.

Astronomers employ a variety of tools, including telescopes, satellites, and advanced instrumentation, to gather data and uncover the mysteries of the cosmos. The field addresses questions about the nature of dark matter, the expansion of the universe, and the potential for extraterrestrial life.

Astronomy not only contributes to our understanding of the cosmos but also inspires wonder and curiosity about the vastness and complexity of the universe we inhabit.

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