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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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Galaxy Questions: Types, Shapes, Evolution & Masses

May 3, 2009 · Replies 2 · May 3, 2009

Replies: 2

Views: 2K

Why Is the Earth Slowing Down?

May 2, 2009 · Replies 1 · May 2, 2009

Replies: 1

Views: 2K

Is Space Really Falling Faster Than Light Near a Black Hole?

Apr 27, 2009 · Replies 3 · May 2, 2009

Replies: 3

Views: 3K

Photos of the our milky way galaxy

May 2, 2009 · Replies 5 · May 2, 2009

Replies: 5

Views: 4K

Spin of planets, bigger means faster?

Apr 30, 2009 · Replies 7 · May 2, 2009

Replies: 7

Views: 19K

Discovering the Mystery of Satellite Shadows: A Beginner's Guide

May 1, 2009 · Replies 2 · May 1, 2009

Replies: 2

Views: 2K

CMB Anisotropy: Measuring Our Motion Through Space

May 1, 2009 · Replies 2 · May 1, 2009

Replies: 2

Views: 2K

What Does 'Quake Confinement' Mean in Astrophysics?

Apr 30, 2009 · Replies 2 · May 1, 2009

Replies: 2

Views: 2K

Wormholes and time travel - Problem

Apr 30, 2009 · Replies 4 · Apr 30, 2009

Replies: 4

Views: 3K

What is Causing The Universal Expansion?

Apr 7, 2009 · Replies 10 · Apr 30, 2009

Replies: 10

Views: 4K

How do astronauts communicate with Earth during space missions?

Apr 29, 2009 · Replies 4 · Apr 29, 2009

Replies: 4

Views: 2K

Galaxy's centre tastes of raspberries and smells of rum

Apr 21, 2009 · Replies 1 · Apr 29, 2009

Replies: 1

Views: 2K

How to Calculate Inclination Angle for Galaxies in the Tully-Fischer Relation

Apr 28, 2009 · Replies 1 · Apr 28, 2009

Replies: 1

Views: 3K

Suggest topics for a 1-sem HS Astronomy course

Apr 26, 2009 · Replies 3 · Apr 28, 2009

Replies: 3

Views: 3K

How does the Satellite manage to stay in earth's orbit?

Apr 27, 2009 · Replies 5 · Apr 28, 2009

Replies: 5

Views: 7K

Stargazing Buy a Telescope Under $400 | Astronomy For Beginners

Apr 21, 2009 · Replies 15 · Apr 28, 2009

Replies: 15

Views: 5K

Age of the sun+age of previous stars = universe ?

Apr 25, 2009 · Replies 6 · Apr 28, 2009

Replies: 6

Views: 5K

Looking at center of our galaxcy question.

Apr 27, 2009 · Replies 1 · Apr 27, 2009

Replies: 1

Views: 2K

Is spacetime truly flat without gravitational influences?

Apr 20, 2009 · Replies 4 · Apr 27, 2009

Replies: 4

Views: 3K

Plotting Elliptical Orbits for Beginners

Apr 26, 2009 · Replies 1 · Apr 26, 2009

Replies: 1

Views: 3K

Can anyone explain the need for elipses?

Apr 23, 2009 · Replies 27 · Apr 26, 2009

Replies: 27

Views: 4K

Is spacetime the surface of a 5 dimensional ball.

Apr 25, 2009 · Replies 3 · Apr 26, 2009

Replies: 3

Views: 2K

Turbulent Cells and Telescopes: Seeking Help

Sep 28, 2005 · Replies 2 · Apr 25, 2009

Replies: 2

Views: 2K

What do you think about the Cosmic String theory?

Apr 24, 2009 · Replies 3 · Apr 25, 2009

Replies: 3

Views: 2K

Which is Better for Stargazing: Sea Level or High Elevation?

Apr 24, 2009 · Replies 1 · Apr 24, 2009

Replies: 1

Views: 2K

Can we travel back and forward in space?

Apr 24, 2009 · Replies 6 · Apr 24, 2009

Replies: 6

Views: 6K

What Are Good Resources for Understanding the M-sigma Relationship in Astronomy?

Apr 23, 2009 · Replies 2 · Apr 24, 2009

Replies: 2

Views: 2K

What would we need for a warp drive?

Apr 19, 2009 · Replies 9 · Apr 22, 2009

Replies: 9

Views: 4K

Calculating time based on solar position

Apr 21, 2009 · Replies 1 · Apr 21, 2009

Replies: 1

Views: 3K

Is 10 Arc Seconds Accurate Enough for Sending Objects to the Moon?

Apr 21, 2009 · Replies 1 · Apr 21, 2009

Replies: 1

Views: 2K

Understanding the Moon's Role in Tides

Apr 16, 2009 · Replies 39 · Apr 20, 2009

2

Replies: 39

Views: 6K

What density does something have to have to be considered a black hole?

Apr 20, 2009 · Replies 1 · Apr 20, 2009

Replies: 1

Views: 3K

Lightning in Space: Fact or Fiction?

Apr 18, 2009 · Replies 3 · Apr 19, 2009

Replies: 3

Views: 2K

Getting vectors out of JPL Horizons

Apr 17, 2009 · Replies 9 · Apr 19, 2009

Replies: 9

Views: 4K

Looking for the Virgo constellation

Apr 12, 2009 · Replies 20 · Apr 18, 2009

Replies: 20

Views: 7K

What Are Orbital Vectors and How Do I Calculate Them?

Apr 13, 2009 · Replies 10 · Apr 18, 2009

Replies: 10

Views: 3K

How do you work out the largest angular scale to which it is sensitive

Apr 12, 2009 · Replies 2 · Apr 18, 2009

Replies: 2

Views: 2K

Why is the dust tail of a comet a tail?

Apr 17, 2009 · Replies 4 · Apr 18, 2009

Replies: 4

Views: 5K

Is It Possible To View The Milky Way In The UK

Apr 18, 2009 · Replies 1 · Apr 18, 2009

Replies: 1

Views: 3K

Wormholes for Dummies Question .

Feb 26, 2009 · Replies 22 · Apr 18, 2009

Replies: 22

Views: 12K

Local Group Center: Direction of Center

Apr 16, 2009 · Replies 3 · Apr 17, 2009

Replies: 3

Views: 2K

What Happens If a Spaceship Exceeds the Speed of Light?

Apr 17, 2009 · Replies 4 · Apr 17, 2009

Replies: 4

Views: 3K

Solving Spectral Plotting Confusion with Hitran Database Data - Help Needed!

Apr 7, 2009 · Replies 1 · Apr 17, 2009

Replies: 1

Views: 2K

Creating a Mini Self-Sustaining Star: The Superstrong Chamber Experiment

Apr 2, 2009 · Replies 9 · Apr 17, 2009

Replies: 9

Views: 3K

Making The Best of Light Polluted Skys

Apr 16, 2009 · Replies 3 · Apr 16, 2009

Replies: 3

Views: 3K

How do solar neutrinos interact with nuclei to create radioactive elements?

Apr 16, 2009 · Replies 2 · Apr 16, 2009

Replies: 2

Views: 2K

Poll: Have you ever seen a UFO, alien or cosmic object?

Apr 15, 2009 · Replies 9 · Apr 16, 2009

Replies: 9

Views: 3K

Calculating Delta-V in Hohmann Transfer Equation

Apr 16, 2009 · Replies 2 · Apr 16, 2009

Replies: 2

Views: 3K

Why is the center of the galaxy located on the elliptic?

Apr 16, 2009 · Replies 2 · Apr 16, 2009

Replies: 2

Views: 2K

Questions about black holes for a fictional story

Apr 13, 2009 · Replies 7 · Apr 16, 2009

Replies: 7

Views: 5K

Stationary satellite in high latitude

Apr 2, 2009 · Replies 5 · Apr 14, 2009

Replies: 5

Views: 2K

Question about the expansion of the universe

Mar 19, 2009 · Replies 12 · Apr 14, 2009

Replies: 12

Views: 4K

Star Catalogue Question - Stars near the Ecliptic

Apr 11, 2009 · Replies 2 · Apr 13, 2009

Replies: 2

Views: 4K

Deorbiting q, low speed reentry?

Aug 19, 2008 · Replies 8 · Apr 13, 2009

Replies: 8

Views: 5K

Are Black Holes Theoretical Phantoms?

Apr 6, 2009 · Replies 12 · Apr 13, 2009

Replies: 12

Views: 4K

Initial Mass Function physics problem

Apr 12, 2009 · Replies 3 · Apr 13, 2009

Replies: 3

Views: 5K

Can I Survive Moving Into a Black Hole?

Mar 19, 2009 · Replies 2 · Apr 13, 2009

Replies: 2

Views: 2K

How Can We Effectively Communicate with Extraterrestrial Life?

Mar 20, 2009 · Replies 14 · Apr 12, 2009

Replies: 14

Views: 4K

When Should I Study Thermal Physics Relative to Quantum Mechanics?

Apr 9, 2009 · Replies 4 · Apr 11, 2009

Replies: 4

Views: 2K

Stargazing Will Reflector Telescope Work Without Eyepiece?

Apr 10, 2009 · Replies 3 · Apr 11, 2009

Replies: 3

Views: 4K

Stargazing Help My telescope fell and now it won't focus

Apr 8, 2009 · Replies 8 · Apr 10, 2009

Replies: 8

Views: 5K

Are space and time definable without atoms?

Mar 25, 2009 · Replies 53 · Apr 10, 2009

2

Replies: 53

Views: 10K

Help w/Viewing Saturn and other stuff

Apr 9, 2009 · Replies 4 · Apr 9, 2009

Replies: 4

Views: 2K

Solution help for the Geodesic Equation

Mar 29, 2009 · Replies 2 · Apr 8, 2009

Replies: 2

Views: 3K

North Korea about to launch ICBM test and/or space satellite

Apr 3, 2009 · Replies 124 · Apr 8, 2009

5

Replies: 124

Views: 16K

How is the Age of the Universe Calculated Despite Light Travel Distance?

Mar 14, 2009 · Replies 12 · Apr 7, 2009

Replies: 12

Views: 4K

Answer: Declination of the Sun - Spring Equinox

Apr 2, 2009 · Replies 9 · Apr 7, 2009

Replies: 9

Views: 7K

Is the universe infinite in size?

Mar 24, 2009 · Replies 12 · Apr 7, 2009

Replies: 12

Views: 4K

How do Black holes radiate energy?

Apr 4, 2009 · Replies 5 · Apr 6, 2009

Replies: 5

Views: 5K

How do the s-process and r-process create elements in stars?

Apr 5, 2009 · Replies 2 · Apr 6, 2009

Replies: 2

Views: 10K

Why Does Our Galaxy's Center Look Bright Despite a Black Hole?

Apr 5, 2009 · Replies 2 · Apr 5, 2009

Replies: 2

Views: 2K

Prof. Kaku's approach on why we haven't met intelligent E.T. life.

Mar 21, 2003 · Replies 23 · Apr 5, 2009

Replies: 23

Views: 8K

North Korean Satellite Fate | Know Today's Launch

Apr 5, 2009 · Replies 1 · Apr 5, 2009

Replies: 1

Views: 2K

Calculate distance between stars in a globular cluster?

Apr 4, 2009 · Replies 1 · Apr 5, 2009

Replies: 1

Views: 5K

Could Apophis Change Earth's Future in 2036?

Mar 30, 2009 · Replies 7 · Apr 4, 2009

Replies: 7

Views: 4K

Are Gravitational Effects Infinite in Black Holes and Wormholes?

Apr 1, 2009 · Replies 5 · Apr 4, 2009

Replies: 5

Views: 4K

What is the synodic period of Mercury?

Apr 3, 2009 · Replies 5 · Apr 3, 2009

Replies: 5

Views: 13K

Stargazing Telescopes: Magnifiers or Time Machines?

Apr 3, 2009 · Replies 9 · Apr 3, 2009

Replies: 9

Views: 3K

Age of universe and time dilation.

Mar 21, 2009 · Replies 10 · Apr 3, 2009

Replies: 10

Views: 6K

Is a Space Station More Cost-Effective than a Moon Base?

Mar 30, 2009 · Replies 34 · Apr 2, 2009

2

Replies: 34

Views: 9K

How Can I Mimic the Best Fit for HD17156b's Radial Velocity Data?

Jun 25, 2008 · Replies 6 · Apr 2, 2009

Replies: 6

Views: 4K

Is there actualy any hi-res footage made with MARS rover?

Mar 26, 2009 · Replies 18 · Apr 2, 2009

Replies: 18

Views: 5K

Max Distance & Time Til Sky Nearly Black

Mar 30, 2009 · Replies 8 · Apr 1, 2009

Replies: 8

Views: 3K

Poll

Is 34% far or slightly smaller than 100%?

Mar 30, 2009 · Replies 10 · Apr 1, 2009

Replies: 10

Views: 3K

Emitted radiation and absorbed solar radiation

Apr 1, 2009 · Replies 1 · Apr 1, 2009

Replies: 1

Views: 6K

If we could travel near the speed of light

Feb 14, 2009 · Replies 23 · Mar 31, 2009

Replies: 23

Views: 6K

How is the energy transfered back to the Moon

Mar 30, 2009 · Replies 3 · Mar 31, 2009

Replies: 3

Views: 2K

Titan - the next closest thing to Earth.

Mar 4, 2009 · Replies 14 · Mar 30, 2009

Replies: 14

Views: 7K

Where Can I Find the Darkest Places for Star Gazing in the Northeast?

Mar 28, 2009 · Replies 6 · Mar 29, 2009

Replies: 6

Views: 14K

Help with Jupiter and Saturn please

Mar 23, 2009 · Replies 3 · Mar 29, 2009

Replies: 3

Views: 3K

Why doesn't iron give off any energy when it is created through nuclear fusion?

Mar 28, 2009 · Replies 3 · Mar 28, 2009

Replies: 3

Views: 3K

Does time slow down when falling into a black hole?

Feb 23, 2009 · Replies 66 · Mar 28, 2009

3

Replies: 66

Views: 14K

Space where General Reletivity Resides

Mar 27, 2009 · Replies 5 · Mar 28, 2009

Replies: 5

Views: 2K

What is the heaviest element that a supernova can produce?

Mar 27, 2009 · Replies 2 · Mar 27, 2009

Replies: 2

Views: 6K

Universe Expansion: Understanding the Role of Geometry in the Expansion of Space

Feb 28, 2009 · Replies 40 · Mar 26, 2009

2

Replies: 40

Views: 8K

Stellar orbits around the milky way.

Mar 26, 2009 · Replies 1 · Mar 26, 2009

Replies: 1

Views: 2K

Transit Method to find extrasolar planets.

Mar 5, 2009 · Replies 12 · Mar 26, 2009

Replies: 12

Views: 7K

Saturn's Rings: Why Are They Split?

Mar 26, 2009 · Replies 2 · Mar 26, 2009

Replies: 2

Views: 2K

What Does Empty Space Really Mean?

Mar 25, 2009 · Replies 5 · Mar 25, 2009

Replies: 5

Views: 3K

TED Prize Winner Jill Tarter - SETI

Mar 17, 2009 · Replies 6 · Mar 25, 2009

Replies: 6

Views: 2K

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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