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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.

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Graduate Proving Least-Energy Orbits of Spacecraft

Oct 7, 2003 · Replies 5 · Oct 8, 2003

Replies: 5

Views: 9K

Graduate Question: How Did Light Reach Us from Quasars with Redshift 1.7 or More?

Oct 4, 2003 · Replies 11 · Oct 8, 2003

Replies: 11

Views: 3K

What's Really Visible from Space: space.com

Oct 8, 2003 · Replies 2 · Oct 8, 2003

Replies: 2

Views: 3K

Pictures of the sun's current sunspots?

Sep 28, 2003 · Replies 2 · Oct 7, 2003

Replies: 2

Views: 3K

Graduate Nanosecond Pulsars: Gauging Universe Expansion

Sep 8, 2003 · Replies 14 · Oct 7, 2003

Replies: 14

Views: 6K

Graduate Gravitational Collapse of Protostars: When Does Fusion Begin?

Oct 6, 2003 · Replies 5 · Oct 7, 2003

Replies: 5

Views: 8K

Time Before The Universe Was Created

Oct 2, 2003 · Replies 8 · Oct 5, 2003

Replies: 8

Views: 9K

Graduate Calculating Wormholes: Scientists and Differential Geometry

Oct 5, 2003 · Replies 2 · Oct 5, 2003

Replies: 2

Views: 5K

What Are the Best Online Resources for Astronomy History?

Oct 5, 2003 · Replies 1 · Oct 5, 2003

Replies: 1

Views: 5K

Graduate Hubble chases exploding stars: re dark energy

Oct 1, 2003 · Replies 1 · Oct 3, 2003

Replies: 1

Views: 4K

Undergrad Can Black Holes Truly Attract Light?

Oct 1, 2003 · Replies 7 · Oct 2, 2003

Replies: 7

Views: 4K

Graduate What Causes the Tidal Force and How Does it Affect the Earth's Rotation?

Sep 27, 2003 · Replies 1 · Oct 1, 2003

Replies: 1

Views: 6K

Stargazing Build Your Own Telescope - Get the Details Now!

Sep 17, 2003 · Replies 7 · Oct 1, 2003

Replies: 7

Views: 7K

Graduate Conceptual Question in Gibbs Orbit Determination

Sep 25, 2003 · Replies 4 · Sep 30, 2003

Replies: 4

Views: 8K

Undergrad What Are Parallel Universes and Their Infinite Possibilities?

Sep 20, 2003 · Replies 16 · Sep 30, 2003

Replies: 16

Views: 5K

Graduate Gamma rays may have devastated life on Earth: Newscientist.com

Sep 25, 2003 · Replies 4 · Sep 30, 2003

Replies: 4

Views: 4K

Undergrad What Does Wave Rating Mean in Telescope Mirrors?

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

Replies: 3

Views: 6K

Graduate Schrodingers Equation in 3 space Dimension

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

Replies: 5

Views: 4K

High School The Closest Gas Giant: Why is Jupiter so Big?

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

Replies: 12

Views: 5K

Graduate Probability over space or time in spacetime

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

Replies: 1

Views: 3K

Graduate Endless geodesics in closed spacetime

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

Replies: 1

Views: 3K

Undergrad 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

Undergrad Dwarfs: Where Does Their Energy Come From?

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

Replies: 4

Views: 3K

Undergrad Does Infinity Exist in the Universe?

Aug 23, 2003 · Replies 46 · Sep 28, 2003

2

Replies: 46

Views: 8K

Undergrad Tidal Forces at Work Between Large & Small Magellanic Clouds?

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

Replies: 4

Views: 4K

Graduate New Formulas for Understanding the Universal Gravitational Constant, G

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

Replies: 3

Views: 4K

High School How efficient are we at detecting near Earth objects?

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

Replies: 1

Views: 3K

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

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

Replies: 2

Views: 4K

Undergrad Deorbiting: Possibility and Explanation

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

Replies: 7

Views: 5K

Undergrad Call to extend [mainstream] alien life search: BBC

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

Replies: 4

Views: 5K

Undergrad The Big Bang: Explaining the Unfathomable

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

Replies: 17

Views: 6K

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

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

Replies: 1

Views: 3K

Undergrad Is Earth Expansion a New Cosmology Case?

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

Replies: 3

Views: 3K

Undergrad 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

Undergrad Giant star caught swallowing three planets: Newscientist.com

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

Replies: 1

Views: 4K

Graduate The Big Bang Revisited: A New Theory on the Precision of Initial Parameters

Sep 16, 2003 · Replies 7 · Sep 17, 2003

Replies: 7

Views: 5K

Graduate 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

Undergrad 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

Undergrad Escape velocity and formulas for circular orbits

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

Replies: 2

Views: 6K

Graduate Angular momentum, torque and eccentricity

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

Replies: 1

Views: 7K

Graduate 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: 5K

Undergrad 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

Graduate Is Dark Matter Energy Lost from Redshifted Radiation?

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

Replies: 1

Views: 3K

Graduate LQG and the begining of the universe

Sep 14, 2003 · Replies 2 · Sep 14, 2003

Replies: 2

Views: 3K

Graduate What Is the Profound Impact of Dark Energy on Our Universe?

Sep 11, 2003 · Replies 17 · Sep 13, 2003

Replies: 17

Views: 4K

Who contributed to Astronomy most?

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

Replies: 1

Views: 2K

Undergrad How Do Astronomers Accurately Count Stars in the Universe?

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

Replies: 5

Views: 6K

High School Can a Vacuum Pump Simulate Planetary Orbits?

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

Replies: 11

Views: 6K

Undergrad Is the Big Bang Theory Flawed?

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

Replies: 6

Views: 7K

High School Is the Universe Really 30 Billion Light Years Across?

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

Replies: 2

Views: 7K

Graduate Half-Light Radius: Definition & Galaxy Merging

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

Replies: 1

Views: 8K

High School Where to Find Celestial Objects Visible from Light Polluted Areas

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

Replies: 3

Views: 3K

Graduate Understanding the Upper Mass Limit of Neutron Stars: A Quick Question

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

Replies: 2

Views: 2K

Undergrad Supermassive Black Hole Sings for Its Supper: Scientific American

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

Replies: 3

Views: 4K

Graduate What Are the True Properties of Space Beyond a Vacuum?

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

Replies: 25

Views: 6K

Graduate What Are the Properties of Dark Energy?

Aug 30, 2003 · Replies 4 · Sep 10, 2003

Replies: 4

Views: 5K

Graduate 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

Graduate 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

Graduate 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

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

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

Replies: 6

Views: 3K

Graduate Explaination of the universe is generaly excepted

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

Replies: 8

Views: 7K

Undergrad What Are the Different Types of Multiverses Explored in Scientific American?

Aug 31, 2003 · Replies 15 · Sep 2, 2003

Replies: 15

Views: 6K

Graduate Is a Universe with a Center More Plausible?

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

Replies: 3

Views: 4K

Graduate Doppler shift and red/blue shift

Sep 1, 2003 · Replies 4 · Sep 2, 2003

Replies: 4

Views: 11K

Graduate Most things in our universe have rotation

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

Replies: 16

Views: 4K

High School Sun Shrink: What Would Happen to Sun's Color?

Aug 14, 2003 · Replies 11 · Aug 31, 2003

Replies: 11

Views: 3K

High School 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

High School What is the concept of a Meridian Circle?

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

Replies: 7

Views: 4K

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

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

Replies: 16

Views: 5K

Undergrad Gravity & Spacetime: How Mass/Energy Affects It

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

Replies: 22

Views: 5K

High School High School Astronomy Classes: A Look at Availability

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

Replies: 1

Views: 2K

Graduate Is the Universe Ruled by a Simple Algorithm?

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

Replies: 19

Views: 4K

Graduate Round One: Big Bang vs. Little Bang

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

Replies: 4

Views: 7K

Stargazing Star of David and Total Lunar Eclipse

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

Replies: 4

Views: 8K

Graduate What is the alternate universe theory regarding infinite extent and black holes?

Aug 20, 2003 · Replies 7 · Aug 29, 2003

Replies: 7

Views: 14K

Graduate 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

Undergrad Theory Proving Everything Has a Beginning?

Aug 25, 2003 · Replies 6 · Aug 27, 2003

Replies: 6

Views: 3K

Which Nebula is Your Favorite Astronomy Photo?

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

Replies: 4

Views: 3K

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

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

Replies: 25

Views: 6K

Graduate Can a Star be Too Big to be Detected?

Aug 12, 2003 · Replies 15 · Aug 27, 2003

Replies: 15

Views: 4K

High School Unlimited Universe: Debunking Theories of a Warped Universe

Aug 22, 2003 · Replies 21 · Aug 26, 2003

Replies: 21

Views: 5K

Graduate 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

Graduate The finite bang fallacy rears its head again

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

Replies: 18

Views: 5K

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

Aug 24, 2003 · Replies 2 · Aug 25, 2003

Replies: 2

Views: 3K

Graduate Is Antimatter Missing Because It Traveled Back in Time?

Aug 22, 2003 · Replies 16 · Aug 25, 2003

Replies: 16

Views: 3K

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

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

Replies: 6

Views: 4K

Graduate 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

Graduate Are Wet, Rocky Planets Common in the Universe?

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

Replies: 2

Views: 3K

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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