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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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Graduate Dark Matter as primordial Black Holes in extended Halos

Oct 16, 2003 · Replies 7 · Oct 19, 2003

Replies: 7

Views: 5K

Graduate The Not So Ultimate Theory of Black Holes that are caused by BEC

Oct 19, 2003 · Replies 1 · Oct 19, 2003

Replies: 1

Views: 2K

High School Why does the Earth rotate as it orbits the sun?

Oct 15, 2003 · Replies 6 · Oct 18, 2003

Replies: 6

Views: 5K

China to launch a man into space on Oct 10th?

Aug 15, 2003 · Replies 10 · Oct 17, 2003

Replies: 10

Views: 5K

High School Is Jupiter's Giant Red Spot Caused by the Coriolis Effect?

Oct 10, 2003 · Replies 14 · Oct 17, 2003

Replies: 14

Views: 5K

Undergrad Counting Supernovae: Estimating the Frequency of Stellar Explosions

Oct 11, 2003 · Replies 14 · Oct 17, 2003

Replies: 14

Views: 4K

High School Discovering Gravity: Understanding the Equation mv^2/r=GmM/r^2"

Oct 17, 2003 · Replies 2 · Oct 17, 2003

Replies: 2

Views: 6K

High School Does Planet Weight Depend on Speed and Gravity?

Oct 13, 2003 · Replies 11 · Oct 17, 2003

Replies: 11

Views: 5K

High School How Do Planets Influence Each Other?

Oct 15, 2003 · Replies 3 · Oct 17, 2003

Replies: 3

Views: 9K

Graduate Is there a solution to the Precession-Time Paradox?

Oct 8, 2003 · Replies 7 · Oct 17, 2003

Replies: 7

Views: 5K

Undergrad How does a boomerang behave in empty space and gravity?

Oct 15, 2003 · Replies 6 · Oct 16, 2003

Replies: 6

Views: 4K

Graduate Microlensing might detect planets as well as MACHOs

Oct 13, 2003 · Replies 1 · Oct 15, 2003

Replies: 1

Views: 3K

Undergrad Unanswered Question: White Dwarfs and Black Holes

Sep 21, 2003 · Replies 31 · Oct 15, 2003

2

Replies: 31

Views: 8K

High School Eight Grader's Question on Deflecting Asteroids

Oct 14, 2003 · Replies 1 · Oct 15, 2003

Replies: 1

Views: 3K

High School What Determines the Gravity of Planets?

Oct 15, 2003 · Replies 3 · Oct 15, 2003

Replies: 3

Views: 7K

What are some lesser-known space programs around the world?

Oct 3, 2003 · Replies 4 · Oct 15, 2003

Replies: 4

Views: 4K

Star '37 Gem' called most likely home to aliens: CNN

Oct 9, 2003 · Replies 15 · Oct 14, 2003

Replies: 15

Views: 4K

Witnessing the Moon's Rapid Set - A Fall Foliage Experiment

Oct 13, 2003 · Replies 1 · Oct 13, 2003

Replies: 1

Views: 3K

Graduate Astronomy, Cosmology, and physics of old

Oct 6, 2003 · Replies 16 · Oct 13, 2003

Replies: 16

Views: 5K

Graduate Conceptional Space/Matter Cosmology,PART2

Oct 11, 2003 · Replies 6 · Oct 12, 2003

Replies: 6

Views: 3K

Undergrad Does Titan Have Oily Oceans?

Oct 7, 2003 · Replies 3 · Oct 12, 2003

Replies: 3

Views: 3K

Graduate Is the Universe Expanding in All Directions at the Same Rate?

Oct 7, 2003 · Replies 10 · Oct 12, 2003

Replies: 10

Views: 5K

Undergrad Orbits: Elliptical vs. Parabolic

Oct 7, 2003 · Replies 12 · Oct 11, 2003

Replies: 12

Views: 11K

Graduate Is the Universe Shaped Like a Dodecahedron?

Oct 9, 2003 · Replies 1 · Oct 11, 2003

Replies: 1

Views: 4K

Graduate How does gravitational lensing support the expansion of space?

Oct 7, 2003 · Replies 8 · Oct 11, 2003

Replies: 8

Views: 4K

Undergrad How Do Contact Binary Stars Coexist Without Destruction?

Jun 9, 2003 · Replies 19 · Oct 11, 2003

Replies: 19

Views: 9K

New Photos of 'Astounding' Mars: space.com

Oct 8, 2003 · Replies 6 · Oct 10, 2003

Replies: 6

Views: 5K

Graduate Conceptional space/time cosmology

Oct 5, 2003 · Replies 6 · Oct 9, 2003

Replies: 6

Views: 3K

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: 2K

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

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: 5K

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 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: 3K

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: 4K

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 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: 5K

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: 4K

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

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: 6K

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 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

Graduate Is a Universe with a Center More Plausible?

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

Replies: 3

Views: 3K

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

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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