Menu

Navigation

More options

Style variation

Contact us

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.

Filters

Will a Toy Top Keep Spinning in Space?

Apr 15, 2008 · Replies 2 · Apr 15, 2008

Replies: 2

Views: 3K

Wien's Law & Earth Emission Spectra: Investigating the discrepancy

Apr 11, 2008 · Replies 9 · Apr 15, 2008

Replies: 9

Views: 5K

Stargazing Telescope alteration (Russ or turbo-1)

Mar 16, 2008 · Replies 48 · Apr 15, 2008

2

Replies: 48

Views: 8K

Will voyager 1 or 2 pass the heliopause

Apr 14, 2008 · Replies 1 · Apr 14, 2008

Replies: 1

Views: 3K

So you discover the dark matter particle Now what?

Apr 14, 2008 · Replies 1 · Apr 14, 2008

Replies: 1

Views: 3K

Artificial Stars: Dream or Possibility?

Oct 31, 2007 · Replies 4 · Apr 14, 2008

Replies: 4

Views: 4K

Are Cosmic Rays Just Electromagnetic Rays from Space?

Apr 13, 2008 · Replies 1 · Apr 13, 2008

Replies: 1

Views: 4K

Why do we say black holes vanish if their mass decreases with hawking radiation?

Mar 22, 2008 · Replies 5 · Apr 12, 2008

Replies: 5

Views: 4K

Where Can I Download M.V.Berry's 'Stability of the Solar System' Paper for Free?

Mar 20, 2008 · Replies 5 · Apr 9, 2008

Replies: 5

Views: 3K

How fast does the universe expand and what are the theories behind it?

Feb 19, 2008 · Replies 16 · Apr 8, 2008

Replies: 16

Views: 12K

What is Dark Energy and How Does It Affect the Universe's Expansion?

Mar 19, 2008 · Replies 5 · Apr 8, 2008

Replies: 5

Views: 2K

Are those shooting stars or satellites in the night sky?

Apr 8, 2008 · Replies 3 · Apr 8, 2008

Replies: 3

Views: 3K

Online Discussion: The End of the World in 2012?

Apr 8, 2008 · Replies 6 · Apr 8, 2008

Replies: 6

Views: 10K

Negative Acceleration in Black Holes

Apr 6, 2008 · Replies 4 · Apr 7, 2008

Replies: 4

Views: 5K

Visualizations without space-time or light

Mar 10, 2008 · Replies 35 · Apr 7, 2008

2

Replies: 35

Views: 6K

Angular momentum of an oblate spheroid

Apr 2, 2008 · Replies 4 · Apr 7, 2008

Replies: 4

Views: 7K

Hawking radiation & Information loss

Mar 27, 2008 · Replies 5 · Apr 7, 2008

Replies: 5

Views: 4K

Rotational kinetic energy and gravity

Mar 27, 2008 · Replies 3 · Apr 4, 2008

Replies: 3

Views: 9K

How Do Black Hole Masses Compare to Normal Matter in the Universe?

Apr 2, 2008 · Replies 5 · Apr 3, 2008

Replies: 5

Views: 4K

Titius-Bode law, any analytical or numerical derivation?

Mar 21, 2008 · Replies 14 · Apr 2, 2008

Replies: 14

Views: 5K

Relativity or Relativistic Theromdynamics

Mar 30, 2008 · Replies 4 · Apr 2, 2008

Replies: 4

Views: 2K

Human versus robotic spaceflight

Mar 18, 2008 · Replies 46 · Apr 1, 2008

2

Replies: 46

Views: 9K

What Is the Orbital Period of an Asteroid with a Temperature of 200 K?

Dec 2, 2006 · Replies 4 · Apr 1, 2008

Replies: 4

Views: 3K

Discovering the Solar Corona Luminosity Curve: Explained and Explored

Mar 29, 2008 · Replies 2 · Apr 1, 2008

Replies: 2

Views: 4K

What Lies Beyond Our Universe? Physicists' Opinions

Mar 28, 2008 · Replies 2 · Mar 29, 2008

Replies: 2

Views: 2K

Universe doesn't equal Time travel

Dec 12, 2005 · Replies 5 · Mar 28, 2008

Replies: 5

Views: 3K

What would happen to Earth without the moon?

Mar 18, 2008 · Replies 12 · Mar 26, 2008

Replies: 12

Views: 6K

Why Don't We Feel Earth's Movement and How Do Tides Affect Well Water Levels?

Mar 25, 2008 · Replies 13 · Mar 26, 2008

Replies: 13

Views: 10K

Gamma Ray burst in the Milkey Way

Mar 21, 2008 · Replies 12 · Mar 26, 2008

Replies: 12

Views: 4K

Rockets in Space: Need for Engines to Change Direction

Mar 25, 2008 · Replies 7 · Mar 26, 2008

Replies: 7

Views: 4K

Snowplow model of a supernova remnant

Mar 23, 2008 · Replies 4 · Mar 26, 2008

Replies: 4

Views: 3K

Moon without Earth: What if Earth Disappears?

Mar 23, 2008 · Replies 14 · Mar 25, 2008

Replies: 14

Views: 6K

Demonstrating Moon's Lack of Internal Rotation

Mar 24, 2008 · Replies 10 · Mar 25, 2008

Replies: 10

Views: 4K

Finding a Local Star Like Ours: 10-50 LY Radius

Mar 23, 2008 · Replies 1 · Mar 23, 2008

Replies: 1

Views: 2K

Sun's Energy Output: How Much & What Could it Power?

Mar 21, 2008 · Replies 5 · Mar 22, 2008

Replies: 5

Views: 47K

Why is the Earth getting closer to the sun and the moon getting farther away?

Mar 11, 2008 · Replies 5 · Mar 22, 2008

Replies: 5

Views: 4K

Naked-Eye Visible GRB: Witnessing Halfway Across All Creation

Mar 20, 2008 · Replies 5 · Mar 21, 2008

Replies: 5

Views: 3K

Why don’t planet hunters find black holes?

Mar 21, 2008 · Replies 2 · Mar 21, 2008

Replies: 2

Views: 3K

Why do we see the near side of the moon only?

Mar 13, 2008 · Replies 23 · Mar 21, 2008

Replies: 23

Views: 10K

Urban legends in authoritative astronomy

Mar 18, 2008 · Replies 46 · Mar 21, 2008

2

Replies: 46

Views: 8K

Earth's Closest Approach to the Sun: Does the Date Change?

Mar 21, 2008 · Replies 4 · Mar 21, 2008

Replies: 4

Views: 6K

Can Early Dark Energy Affect Standard Rulers in Cosmology?

Mar 21, 2008 · Replies 1 · Mar 21, 2008

Replies: 1

Views: 2K

What are the limiting factors in this case

Mar 20, 2008 · Replies 4 · Mar 21, 2008

Replies: 4

Views: 3K

Why Does Earth's Axis Precess Like a Spinning Top?

Mar 20, 2008 · Replies 3 · Mar 21, 2008

Replies: 3

Views: 8K

Minimum value of g for blackhole

Mar 20, 2008 · Replies 1 · Mar 20, 2008

Replies: 1

Views: 4K

Light Entering Black Hole: Observed or Not?

Mar 18, 2008 · Replies 5 · Mar 19, 2008

Replies: 5

Views: 3K

How Are Black Holes Detected and Measured?

May 11, 2007 · Replies 11 · Mar 19, 2008

Replies: 11

Views: 5K

Relation between earth position in orbit and its tilt

Mar 18, 2008 · Replies 5 · Mar 19, 2008

Replies: 5

Views: 9K

Possible webpage title: Need Help with These Astronomy Questions?

Mar 17, 2008 · Replies 1 · Mar 17, 2008

Replies: 1

Views: 2K

Newbie question on atsrophotography

Mar 17, 2008 · Replies 2 · Mar 17, 2008

Replies: 2

Views: 2K

A Beginner's Guide to Learning About Black Holes

Mar 4, 2008 · Replies 9 · Mar 17, 2008

Replies: 9

Views: 3K

Gravity for a stellar black hole

Feb 27, 2008 · Replies 26 · Mar 17, 2008

Replies: 26

Views: 8K

Can two stars have the same apparent but different absolute magnitudes

Mar 9, 2008 · Replies 6 · Mar 17, 2008

Replies: 6

Views: 16K

Superbubbles from shock waves from supernova or stellar winds?

Mar 14, 2008 · Replies 2 · Mar 16, 2008

Replies: 2

Views: 2K

Earth/solar position vs spiral arms

Mar 16, 2008 · Replies 3 · Mar 16, 2008

Replies: 3

Views: 4K

Moon Preservation: What if a Spaceshuttle or Missile Hit It?

Mar 15, 2008 · Replies 5 · Mar 15, 2008

Replies: 5

Views: 2K

What Material Makes Up Black Holes?

Dec 23, 2007 · Replies 6 · Mar 15, 2008

Replies: 6

Views: 5K

Astronomy Videos: Collection by NGC6822 on YouTube

Mar 14, 2008 · Replies 1 · Mar 14, 2008

Replies: 1

Views: 2K

Anybody know anything about parallelogram mounts

Feb 29, 2008 · Replies 6 · Mar 14, 2008

Replies: 6

Views: 6K

. Radio Spectroscopy -> Finding the doppler shift in a graph

Mar 13, 2008 · Replies 1 · Mar 14, 2008

Replies: 1

Views: 4K

Just a simple explanation please

Mar 12, 2008 · Replies 5 · Mar 13, 2008

Replies: 5

Views: 3K

Equatorial Bulge: Causes & Explanation

Feb 18, 2008 · Replies 10 · Mar 13, 2008

Replies: 10

Views: 10K

A question regarding the orbit of material in a galaxy such as ours

Mar 12, 2008 · Replies 2 · Mar 12, 2008

Replies: 2

Views: 2K

Can two planets inhabit the same orbit?

Mar 12, 2008 · Replies 4 · Mar 12, 2008

Replies: 4

Views: 8K

Just Checking - Calculating Angular Diameter of Moon

Mar 11, 2008 · Replies 2 · Mar 11, 2008

Replies: 2

Views: 8K

Can there be anything outside of our Existance?

Sep 19, 2005 · Replies 15 · Mar 11, 2008

Replies: 15

Views: 4K

Measuring the temperature of quasars

Mar 10, 2008 · Replies 2 · Mar 11, 2008

Replies: 2

Views: 4K

Calculating Absolute Magnitude of a Star - Red's Help

Mar 10, 2008 · Replies 1 · Mar 10, 2008

Replies: 1

Views: 3K

Could Dark Matter be mass in EM fields?

Mar 7, 2008 · Replies 7 · Mar 10, 2008

Replies: 7

Views: 3K

Solve Your HR Diagram Problem with Expert Help - Tuugii

Mar 2, 2008 · Replies 3 · Mar 10, 2008

Replies: 3

Views: 3K

Advantage of measuring stellar parallaxes from Mars rather than Earth?

Mar 9, 2008 · Replies 2 · Mar 9, 2008

Replies: 2

Views: 4K

If blackholes, then antiblackholes?

Mar 8, 2008 · Replies 2 · Mar 9, 2008

Replies: 2

Views: 3K

How do i find a Astronomy club close to me ?

Mar 7, 2008 · Replies 2 · Mar 8, 2008

Replies: 2

Views: 3K

Satellite Right Acension and Declination Calculations

Mar 7, 2008 · Replies 4 · Mar 7, 2008

Replies: 4

Views: 9K

Are matter and energy equally represented

Mar 7, 2008 · Replies 2 · Mar 7, 2008

Replies: 2

Views: 2K

Stargazing Finding the Perfect Telescope for First-Time Buyers

Mar 7, 2008 · Replies 4 · Mar 7, 2008

Replies: 4

Views: 2K

Stargazing Why Do Telescopes Have Long Focal Lengths?

Mar 5, 2008 · Replies 11 · Mar 7, 2008

Replies: 11

Views: 4K

Can Particle-Antiparticle Pairs Form Stable Unions?

Mar 5, 2008 · Replies 3 · Mar 6, 2008

Replies: 3

Views: 4K

Radiative transfer to space affected by atmosphere?

Mar 5, 2008 · Replies 3 · Mar 6, 2008

Replies: 3

Views: 3K

Cosmological relativity theories

Nov 8, 2004 · Replies 3 · Mar 5, 2008

Replies: 3

Views: 5K

Star Threatens Earth: Is it Real?

Mar 4, 2008 · Replies 4 · Mar 5, 2008

Replies: 4

Views: 3K

Measuring Distance: How Far Are Stars?

Mar 4, 2008 · Replies 3 · Mar 5, 2008

Replies: 3

Views: 4K

Appearance of the lakes on Titan

Mar 4, 2008 · Replies 2 · Mar 4, 2008

Replies: 2

Views: 3K

Can Information Really Be Lost in Black Holes and Our Minds?

Feb 27, 2008 · Replies 15 · Mar 3, 2008

Replies: 15

Views: 7K

Can an observer entering a black hole reach the end of time?

Feb 22, 2008 · Replies 3 · Mar 3, 2008

Replies: 3

Views: 3K

Who Can Help Me Customize My New MySpace Page?

Feb 18, 2008 · Replies 78 · Mar 3, 2008

3

Replies: 78

Views: 10K

Is the Drake Equation Still Relevant in Today's Rapidly Advancing Technology?

Mar 2, 2008 · Replies 1 · Mar 2, 2008

Replies: 1

Views: 2K

Would you expect comets to follow the ecliptic? Explain.

Feb 18, 2008 · Replies 2 · Mar 2, 2008

Replies: 2

Views: 3K

Where Can I Find the Radial Velocity of the Sun Relative to Earth?

Feb 24, 2008 · Replies 5 · Mar 2, 2008

Replies: 5

Views: 14K

Gravity as consequence of universe expansion

Feb 23, 2008 · Replies 4 · Mar 2, 2008

Replies: 4

Views: 5K

Unveiling the Mystery: The Birth of Stars and the Role of Nuclear Fusion

Feb 26, 2008 · Replies 5 · Mar 2, 2008

Replies: 5

Views: 3K

Pioneer Anomaly: Unravelling Physics' Mysteries

Dec 23, 2004 · Replies 65 · Mar 1, 2008

3

Replies: 65

Views: 17K

GRAVITAS GRAVITAS: Portraits of a Universe in Motion - Freely Available

Feb 26, 2008 · Replies 5 · Mar 1, 2008

Replies: 5

Views: 3K

Trajectory of a Test Particle in a Semidetached Binary

Feb 24, 2008 · Replies 1 · Mar 1, 2008

Replies: 1

Views: 3K

Do Planets' Magnetic Fields Depend on Their Composition?

Feb 28, 2008 · Replies 3 · Feb 29, 2008

Replies: 3

Views: 3K

Rotation period vs. mass of planets in solar system

Feb 12, 2008 · Replies 7 · Feb 29, 2008

Replies: 7

Views: 9K

What caused the cooling of the universe?

Feb 15, 2008 · Replies 16 · Feb 28, 2008

Replies: 16

Views: 8K

Sun rotation difference (equator/latitude/pole)?

Feb 21, 2008 · Replies 5 · Feb 28, 2008

Replies: 5

Views: 10K

Earth's Orbit Change: Impact on Life - Will We Die?

Feb 27, 2008 · Replies 3 · Feb 27, 2008

Replies: 3

Views: 3K

What is the Wavelength of Hawking Radiation?

Dec 29, 2003 · Replies 8 · Feb 27, 2008

Replies: 8

Views: 6K

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.

Top