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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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Life on a brown dwarf or a fissioning rouge planet?

Jan 18, 2006 · Replies 2 · Jan 18, 2006

Replies: 2

Views: 4K

Nemesis and Planet X: Can they be Ruled Out?

Jan 1, 2006 · Replies 14 · Jan 18, 2006

Replies: 14

Views: 11K

What Do Orbital Motions of Outer Planets Reveal About the Pioneer Anomaly?

Jan 14, 2006 · Replies 16 · Jan 18, 2006

Replies: 16

Views: 3K

Exploring Our Solar System: Gas and Debris

Jan 16, 2006 · Replies 8 · Jan 17, 2006

Replies: 8

Views: 4K

Determining Best Time of Year to Observe a Star - Astronomy for Beginners

Jan 15, 2006 · Replies 1 · Jan 17, 2006

Replies: 1

Views: 3K

A New Explanation for Venus' Retrograde Rotation

Jan 12, 2006 · Replies 10 · Jan 16, 2006

Replies: 10

Views: 7K

Can Sound Be Heard on Other Planets?

Jan 14, 2006 · Replies 1 · Jan 15, 2006

Replies: 1

Views: 6K

Can We Observe the Growth of Black Holes and Their Mysterious Processes?

Dec 27, 2005 · Replies 5 · Jan 14, 2006

Replies: 5

Views: 3K

Analyzing Dark Matter Halos: Isothermal vs NFW Profiles

Jan 9, 2006 · Replies 7 · Jan 14, 2006

Replies: 7

Views: 5K

Not sure this is the right thread for this?

Jan 10, 2006 · Replies 3 · Jan 14, 2006

Replies: 3

Views: 2K

Age & Distance of Stars: Clarifying Light Speed Impact

Jan 10, 2006 · Replies 10 · Jan 13, 2006

Replies: 10

Views: 3K

Trapezium in orion was a very strange quadruple star

Jan 11, 2006 · Replies 2 · Jan 12, 2006

Replies: 2

Views: 3K

Three cheers and two years for the Mars rovers

Jan 10, 2006 · Replies 7 · Jan 12, 2006

Replies: 7

Views: 2K

Why don't stars explode? What holds them together?

Oct 28, 2005 · Replies 32 · Jan 12, 2006

2

Replies: 32

Views: 15K

Planetary Orbits Around Black Holes

Jan 12, 2006 · Replies 2 · Jan 12, 2006

Replies: 2

Views: 2K

Heim-Dröscher space,eight-dimensional universe, Mars-Earth: three hour trip

Jan 11, 2006 · Replies 1 · Jan 11, 2006

Replies: 1

Views: 6K

Earth Seen from Mars - NASA JPL Image

Dec 31, 2005 · Replies 4 · Jan 11, 2006

Replies: 4

Views: 3K

Placing an Asteroid in Moon Orbit: Is It Possible?

Dec 27, 2005 · Replies 16 · Jan 11, 2006

Replies: 16

Views: 5K

Finding the distance to an Asteroid

Jan 11, 2006 · Replies 2 · Jan 11, 2006

Replies: 2

Views: 3K

Destroy a Planet: How to Annihilate a Planet

Jan 9, 2006 · Replies 21 · Jan 11, 2006

Replies: 21

Views: 6K

Frank Tipler on Matter-Energy Conversion

Jan 3, 2006 · Replies 21 · Jan 7, 2006

Replies: 21

Views: 6K

Earth Space Agency: Your Opinion Matters

Jan 5, 2006 · Replies 2 · Jan 5, 2006

Replies: 2

Views: 2K

Same star in many places in the sky

Jan 1, 2006 · Replies 11 · Jan 4, 2006

Replies: 11

Views: 3K

Spacetime Diagram of Binary Star System - Get Visuals & Info

Dec 27, 2005 · Replies 5 · Jan 2, 2006

Replies: 5

Views: 3K

New Clifford Will paper (LISA, BHs)

Jan 1, 2006 · Replies 1 · Jan 1, 2006

Replies: 1

Views: 2K

Not your standard '2005 in review' thread

Jan 1, 2006 · Replies 3 · Jan 1, 2006

Replies: 3

Views: 2K

Alternate sources for 3K background radiation?

Dec 29, 2005 · Replies 7 · Jan 1, 2006

Replies: 7

Views: 3K

How do the moon's & earth's orbital planes intersect?

Dec 31, 2005 · Replies 1 · Dec 31, 2005

Replies: 1

Views: 13K

Understanding Negative Pressure: Physical Description Explained

Dec 27, 2005 · Replies 12 · Dec 30, 2005

Replies: 12

Views: 5K

What Causes the Vibrant Cloud Colors on Jupiter?

Dec 28, 2005 · Replies 1 · Dec 29, 2005

Replies: 1

Views: 59K

How Do We Know the Sun's Orbit Through the Galaxy?

Dec 27, 2005 · Replies 2 · Dec 28, 2005

Replies: 2

Views: 6K

Is It Possible to Destroy Stars Technologically?

Nov 13, 2005 · Replies 27 · Dec 27, 2005

Replies: 27

Views: 7K

I am probably going to be critizied for this, but

Sep 16, 2005 · Replies 34 · Dec 27, 2005

2

Replies: 34

Views: 7K

What Happens When a Star Exceeds the Chandrasekhar Limit and Forms a Black Hole?

Dec 25, 2005 · Replies 3 · Dec 27, 2005

Replies: 3

Views: 3K

Is Blackhole Symmetry Proportional to Information Exchange?

May 5, 2004 · Replies 38 · Dec 21, 2005

2

Replies: 38

Views: 10K

What do we know about the mysterious dark energy and dark matter?

Dec 20, 2005 · Replies 1 · Dec 20, 2005

Replies: 1

Views: 2K

About to become an armchair astronomer

Dec 19, 2005 · Replies 1 · Dec 20, 2005

Replies: 1

Views: 5K

How do know if something is red-shifted without prior knowledge?

Dec 18, 2005 · Replies 4 · Dec 19, 2005

Replies: 4

Views: 2K

What is Universeguy's Paradox in the Study of the Pary Galaxy?

Dec 6, 2005 · Replies 26 · Dec 19, 2005

Replies: 26

Views: 5K

Correct Understanding of Big Bang Theory

Dec 17, 2005 · Replies 3 · Dec 17, 2005

Replies: 3

Views: 3K

A theory of gravity based on special relativity

Dec 16, 2005 · Replies 7 · Dec 17, 2005

Replies: 7

Views: 3K

Space-Time Fabric: Is There Anything Beyond?

Dec 16, 2005 · Replies 1 · Dec 16, 2005

Replies: 1

Views: 4K

How is the Precession of Mercury's Perihelion Calculated and Explained?

Nov 28, 2005 · Replies 15 · Dec 16, 2005

Replies: 15

Views: 7K

Understanding the Earth-Moon Center of Mass and Its Effects on Lunar Orbit

Dec 16, 2005 · Replies 7 · Dec 16, 2005

Replies: 7

Views: 10K

Big Bang and the Law of Conservation of Matter/Energy?

Dec 15, 2005 · Replies 3 · Dec 16, 2005

Replies: 3

Views: 7K

Explaining the Cuspy Halo Problem

Dec 15, 2005 · Replies 2 · Dec 16, 2005

Replies: 2

Views: 5K

Lifecycles of Stars: What Causes Gravity in the Beginning?

Dec 15, 2005 · Replies 1 · Dec 15, 2005

Replies: 1

Views: 3K

Have You Ever Watched the Movie Spaceballs?

Dec 13, 2005 · Replies 14 · Dec 14, 2005

Replies: 14

Views: 6K

Uncovering the Truth: Examining the Existence of Gravitational Waves

Dec 4, 2005 · Replies 37 · Dec 14, 2005

2

Replies: 37

Views: 7K

Discussion/essay for uni on the Inflation proscess

Dec 12, 2005 · Replies 24 · Dec 14, 2005

Replies: 24

Views: 6K

Does a Flat Universe Have an Edge?

Dec 12, 2005 · Replies 3 · Dec 14, 2005

Replies: 3

Views: 5K

Could the Big Bang Allow for an Infinite Universe?

Dec 12, 2005 · Replies 1 · Dec 12, 2005

Replies: 1

Views: 8K

Some spiral galaxies larger than previously reported

Dec 9, 2005 · Replies 9 · Dec 10, 2005

Replies: 9

Views: 3K

What Defines the Space Opera Genre?

Dec 8, 2005 · Replies 6 · Dec 10, 2005

Replies: 6

Views: 3K

Can a galaxy have a recession velocity greater than the speed of light?

Dec 9, 2005 · Replies 4 · Dec 9, 2005

Replies: 4

Views: 4K

Solving for Mars Encounter Orbit w/Limited Info

Dec 2, 2005 · Replies 5 · Dec 9, 2005

Replies: 5

Views: 3K

What is the true origin of gamma ray bursts?

Nov 23, 2005 · Replies 14 · Dec 9, 2005

Replies: 14

Views: 4K

Chicago: New Views of the Universe (Dec 8-13,2005)

Dec 8, 2005 · Replies 5 · Dec 8, 2005

Replies: 5

Views: 2K

Neutronium article @ Wikipedia in need of experts and knowledgeables

Dec 5, 2005 · Replies 5 · Dec 8, 2005

Replies: 5

Views: 3K

VLF Radio Astronomy: Research & Sources

Dec 4, 2005 · Replies 2 · Dec 8, 2005

Replies: 2

Views: 6K

4 Astronomy Problems: ASSISTANCE NEEDED PLEASE

Dec 4, 2005 · Replies 33 · Dec 7, 2005

2

Replies: 33

Views: 6K

Distinguishing MOND from dark matter

Nov 27, 2005 · Replies 15 · Dec 6, 2005

Replies: 15

Views: 4K

What role do orbits play in Earth's climate change?

Dec 2, 2005 · Replies 5 · Dec 6, 2005

Replies: 5

Views: 3K

Kuiper Belt Info: Sidereal Period & Kepler's Equations

Dec 4, 2005 · Replies 4 · Dec 6, 2005

Replies: 4

Views: 3K

Solar System: Size, Planets & Comets

Dec 3, 2005 · Replies 2 · Dec 6, 2005

Replies: 2

Views: 4K

Stargazing Interested in Astrophotography? Check Out My Site!

Dec 4, 2005 · Replies 23 · Dec 5, 2005

Replies: 23

Views: 9K

Missing Galaxies? Visible Universe Mystery

Dec 2, 2005 · Replies 11 · Dec 4, 2005

Replies: 11

Views: 4K

Is a Miniature Solar System Being Born?

Nov 30, 2005 · Replies 3 · Dec 3, 2005

Replies: 3

Views: 3K

What is a Black Hole Actually Made Of?

Nov 28, 2005 · Replies 6 · Dec 3, 2005

Replies: 6

Views: 2K

Need WMAP error bars for CMBFAST power spectrum output

Jun 25, 2003 · Replies 2 · Dec 2, 2005

Replies: 2

Views: 7K

The Universe as big as a basket ball?

Nov 28, 2005 · Replies 6 · Nov 30, 2005

Replies: 6

Views: 11K

What is Causing the Expansion of a Singular Particle in an Absorbed Universe?

Nov 23, 2005 · Replies 5 · Nov 30, 2005

Replies: 5

Views: 2K

Recent Supernovae Ia observations tend to rule out all the cosmologies

Nov 22, 2005 · Replies 7 · Nov 30, 2005

Replies: 7

Views: 4K

Paper - Sun not powered by H fusion

Nov 15, 2005 · Replies 29 · Nov 30, 2005

Replies: 29

Views: 5K

Could Flattened Disks Explain Galaxy Rotation Without Dark Matter?

Nov 30, 2005 · Replies 1 · Nov 30, 2005

Replies: 1

Views: 2K

Intro to Astronomy & Astrophysics

Nov 22, 2005 · Replies 4 · Nov 30, 2005

Replies: 4

Views: 8K

Jupiter as a Gravitational lens?

Nov 27, 2005 · Replies 7 · Nov 30, 2005

Replies: 7

Views: 9K

Does natural selection apply extra-galactically?

Nov 9, 2005 · Replies 17 · Nov 30, 2005

Replies: 17

Views: 4K

Edmund halley and the venus transit

Nov 26, 2005 · Replies 10 · Nov 29, 2005

Replies: 10

Views: 5K

Poll

Andre's Question: A or B Before C?

Nov 6, 2005 · Replies 21 · Nov 29, 2005

Replies: 21

Views: 3K

Probe returning with asteroid rock sample

Nov 28, 2005 · Replies 1 · Nov 28, 2005

Replies: 1

Views: 2K

What Is the Entropy of a Black Hole?

Nov 26, 2005 · Replies 3 · Nov 27, 2005

Replies: 3

Views: 6K

Poll of exoplanet-finders about best methods

Nov 21, 2005 · Replies 9 · Nov 26, 2005

Replies: 9

Views: 2K

Why Did the Big Bang Create Irregular Bumps Instead of Expanding Uniformly?

Nov 23, 2005 · Replies 2 · Nov 24, 2005

Replies: 2

Views: 2K

Why are our planets and galaxy in a plane shape?

Nov 23, 2005 · Replies 3 · Nov 24, 2005

Replies: 3

Views: 3K

Delay of JWST a Major Setback for Astronomy

Nov 21, 2005 · Replies 6 · Nov 23, 2005

Replies: 6

Views: 4K

Gravitational tractor for towing asteroids

Nov 22, 2005 · Replies 1 · Nov 22, 2005

Replies: 1

Views: 3K

Why does a gas cloud spontanously rotate?

Oct 9, 2005 · Replies 12 · Nov 22, 2005

Replies: 12

Views: 8K

Could Quasars Be Ejection Events Instead of Collisions?

Nov 15, 2005 · Replies 4 · Nov 21, 2005

Replies: 4

Views: 2K

Speed of light? Or velocity of free space?

Nov 20, 2005 · Replies 4 · Nov 20, 2005

Replies: 4

Views: 7K

Center of Galaxys: Red Giant or Supernova?

Oct 27, 2005 · Replies 16 · Nov 20, 2005

Replies: 16

Views: 7K

Will the Venus Express Solve Mysteries or Uncover More?

Nov 9, 2005 · Replies 4 · Nov 19, 2005

Replies: 4

Views: 3K

PF is taken over by space robots?

Nov 15, 2005 · Replies 64 · Nov 19, 2005

3

Replies: 64

Views: 6K

If space is flat then what is directly under the planets?

Nov 19, 2005 · Replies 9 · Nov 19, 2005

Replies: 9

Views: 32K

Planets cause a warp in the fabric of space time

Nov 18, 2005 · Replies 3 · Nov 18, 2005

Replies: 3

Views: 2K

Flat Universe Theory: Questions & Answers

Nov 15, 2005 · Replies 5 · Nov 18, 2005

Replies: 5

Views: 3K

Astronomy Problems: Please Look/help

Nov 13, 2005 · Replies 93 · Nov 17, 2005

4

Replies: 93

Views: 12K

What Are the Best Papers on Dark Matter and Dark Energy?

Nov 16, 2005 · Replies 2 · Nov 17, 2005

Replies: 2

Views: 2K

Patent 4 a close 2 C space vehicle drive

Nov 14, 2005 · Replies 3 · Nov 16, 2005

Replies: 3

Views: 3K

Calculating Speed of Stationary Object Falling Towards Earth

Nov 12, 2005 · Replies 23 · Nov 16, 2005

Replies: 23

Views: 13K

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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