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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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Do black holes have multiple singularities?

Apr 2, 2005 · Replies 16 · Apr 11, 2005

Replies: 16

Views: 5K

Redening of light from a certian density of particals

Apr 11, 2005 · Replies 1 · Apr 11, 2005

Replies: 1

Views: 2K

Escape Velocity Given Radius of 2 Objects

Apr 10, 2005 · Replies 4 · Apr 11, 2005

Replies: 4

Views: 4K

Discovering Hoag's Object: A Fascinating Cosmic Smoke Ring in Space

Apr 8, 2005 · Replies 1 · Apr 10, 2005

Replies: 1

Views: 2K

The Possibility of a Black Hole Big Bang

Apr 7, 2005 · Replies 5 · Apr 10, 2005

Replies: 5

Views: 2K

3 Questions - Why are some orbits

Apr 8, 2005 · Replies 3 · Apr 9, 2005

Replies: 3

Views: 2K

Can Spacetime Foam Create New Universes?

Apr 8, 2005 · Replies 3 · Apr 9, 2005

Replies: 3

Views: 2K

Stargazing A Partial Solar Eclipse Viewing Guide

Apr 8, 2005 · Replies 1 · Apr 9, 2005

Replies: 1

Views: 3K

How does distance from the sun affect the apparent brightness?

Apr 8, 2005 · Replies 8 · Apr 9, 2005

Replies: 8

Views: 8K

Clay-like Material: From Soft to Hard in Space and Earth

Apr 8, 2005 · Replies 1 · Apr 8, 2005

Replies: 1

Views: 3K

Does the big bang imply a finite universe

Mar 23, 2005 · Replies 47 · Apr 8, 2005

2

Replies: 47

Views: 10K

Shape of the Universe: Flat or Curved?

Apr 7, 2005 · Replies 1 · Apr 8, 2005

Replies: 1

Views: 2K

Why is it difficult to measure the perihelion advance of the planet Venus? Help

Mar 28, 2005 · Replies 7 · Apr 8, 2005

Replies: 7

Views: 4K

Are Magnetic Anomalies the Cause of Black Hole Eruptions?

Apr 7, 2005 · Replies 5 · Apr 7, 2005

Replies: 5

Views: 2K

The Hubble Length and Mass of the Universe

Mar 26, 2005 · Replies 21 · Apr 7, 2005

Replies: 21

Views: 12K

Habitable Planets: Disaster Zones and Safe Havens

Apr 6, 2005 · Replies 16 · Apr 6, 2005

Replies: 16

Views: 3K

Habitable Worlds circling non-Sol like stars

Apr 6, 2005 · Replies 3 · Apr 6, 2005

Replies: 3

Views: 3K

Moon Moving Away: Effects & Possibilities

Apr 6, 2005 · Replies 1 · Apr 6, 2005

Replies: 1

Views: 2K

Disk Scale Length Help: Troubleshooting for Science Fair

Apr 5, 2005 · Replies 3 · Apr 6, 2005

Replies: 3

Views: 5K

Stargazing Can You Find a Quality Telescope for Under $100?

Apr 4, 2005 · Replies 5 · Apr 5, 2005

Replies: 5

Views: 3K

Exo-Planets: 70% Eccentric Orbits - Does It Imply Rare Solar System?

Apr 5, 2005 · Replies 2 · Apr 5, 2005

Replies: 2

Views: 4K

Another possible crisis for the standard cosmological model?

Apr 4, 2005 · Replies 6 · Apr 5, 2005

Replies: 6

Views: 3K

Neutron stars: good short article

Apr 3, 2005 · Replies 4 · Apr 5, 2005

Replies: 4

Views: 5K

Proving the Expansion of the Universe

Apr 4, 2005 · Replies 12 · Apr 5, 2005

Replies: 12

Views: 4K

Magnetic fields and inter stella medium

Apr 4, 2005 · Replies 5 · Apr 5, 2005

Replies: 5

Views: 2K

Armchair Cosmology: Djorgovski & Williams Examine Virtual Observatories

Apr 4, 2005 · Replies 2 · Apr 5, 2005

Replies: 2

Views: 2K

Measuring Venus Perihelion: Challenges & Solutions

Mar 28, 2005 · Replies 5 · Apr 5, 2005

Replies: 5

Views: 9K

Which Fundamental Force Drives Inflation?

Apr 4, 2005 · Replies 6 · Apr 5, 2005

Replies: 6

Views: 2K

Solar Flares: Causes, Effects & Prevention

Apr 4, 2005 · Replies 3 · Apr 5, 2005

Replies: 3

Views: 4K

Is Our Solar System Unique or Just Run of the Mill?

Apr 2, 2005 · Replies 16 · Apr 4, 2005

Replies: 16

Views: 4K

Is There a Preferred Axis in the Cosmic Radiation Anisotropy?

Apr 1, 2005 · Replies 4 · Apr 4, 2005

Replies: 4

Views: 3K

Interpreting Spectra for Jupiter's Rotational Speed

Apr 3, 2005 · Replies 5 · Apr 4, 2005

Replies: 5

Views: 3K

Newton's Equation: Applying to Earth-Moon-Sun System

Apr 4, 2005 · Replies 4 · Apr 4, 2005

Replies: 4

Views: 9K

Is Hawking Right About Black Holes Not Being Black?

Mar 29, 2005 · Replies 22 · Apr 4, 2005

Replies: 22

Views: 4K

Is Space Time Only Relevant in Space?

Mar 31, 2005 · Replies 23 · Apr 4, 2005

Replies: 23

Views: 4K

What is the cutoff speed-of-sound for humans to distinguish direction in water?

Mar 24, 2005 · Replies 70 · Apr 4, 2005

3

Replies: 70

Views: 9K

Why Do Hot Jupiters Exist and Not Other Planetary Configurations?

Apr 3, 2005 · Replies 12 · Apr 3, 2005

Replies: 12

Views: 3K

Can Mass Exist in a Singularity?

Feb 26, 2005 · Replies 49 · Apr 3, 2005

2

Replies: 49

Views: 8K

How does light interact with objects?

Apr 1, 2005 · Replies 20 · Apr 3, 2005

Replies: 20

Views: 4K

Question: How do universes reproduce and pass on their physical constants?

Mar 31, 2005 · Replies 14 · Apr 2, 2005

Replies: 14

Views: 3K

Does Mars have it's own calendar yet?

Mar 26, 2005 · Replies 17 · Apr 2, 2005

Replies: 17

Views: 9K

Is the Friedmann Equation Failing at Late Times?

Apr 1, 2005 · Replies 3 · Apr 2, 2005

Replies: 3

Views: 2K

Are We Missing Earth-Like Planets Due to Orbital Orientation?

Mar 22, 2005 · Replies 11 · Apr 2, 2005

Replies: 11

Views: 6K

First Stars - How big - Now Black Holes?

Mar 17, 2005 · Replies 55 · Apr 2, 2005

2

Replies: 55

Views: 8K

Is the Matter-Antimatter Imbalance in Our Universe Just a Simple Anomaly?

Mar 14, 2005 · Replies 12 · Apr 2, 2005

Replies: 12

Views: 4K

The most complex extraterrestrial molecule

Apr 1, 2005 · Replies 1 · Apr 1, 2005

Replies: 1

Views: 3K

Expanding Universe: Is everything really getting bigger?

Mar 24, 2005 · Replies 58 · Apr 1, 2005

2

Replies: 58

Views: 8K

Oort Cloud Treat to Interstellar Space Travel

Mar 21, 2005 · Replies 3 · Mar 31, 2005

Replies: 3

Views: 6K

How to calculate age of universe with a certain redshift?

Mar 30, 2005 · Replies 16 · Mar 31, 2005

Replies: 16

Views: 36K

What If: Gravity Changed When Universe Laws Tweaked?

Mar 30, 2005 · Replies 2 · Mar 30, 2005

Replies: 2

Views: 2K

Astrophysics Scientific Research

Mar 16, 2005 · Replies 7 · Mar 30, 2005

Replies: 7

Views: 3K

Electric Planet? Is It Possible?

Mar 28, 2005 · Replies 3 · Mar 29, 2005

Replies: 3

Views: 2K

Can We Detect WIMPs and Axions on Earth?

Mar 29, 2005 · Replies 4 · Mar 29, 2005

Replies: 4

Views: 2K

Need Term for a Star and Its Associated Bodies

Mar 22, 2005 · Replies 6 · Mar 28, 2005

Replies: 6

Views: 2K

Stargazing How to Design a Simple Telescope?

Mar 27, 2005 · Replies 4 · Mar 28, 2005

Replies: 4

Views: 3K

New overview of cosmology for Ashtekar's book

Mar 27, 2005 · Replies 3 · Mar 28, 2005

Replies: 3

Views: 3K

Are Solar Systems Common in the Universe?

Mar 27, 2005 · Replies 4 · Mar 28, 2005

Replies: 4

Views: 4K

What Happens to Matter and Energy at the End of the Universe?

Mar 15, 2005 · Replies 56 · Mar 28, 2005

2

Replies: 56

Views: 11K

Atmospheric Pressure determined by?

Mar 26, 2005 · Replies 1 · Mar 27, 2005

Replies: 1

Views: 6K

Stargazing Building a DIY Radio Telescope: Worth the Time and Effort?

Feb 20, 2005 · Replies 4 · Mar 27, 2005

Replies: 4

Views: 4K

The age of the universe: easy question - hard answer

Feb 22, 2005 · Replies 69 · Mar 27, 2005

3

Replies: 69

Views: 11K

What Are Common Misconceptions About the Big Bang?

Mar 3, 2005 · Replies 14 · Mar 27, 2005

Replies: 14

Views: 2K

Reach the End of Universe: Is There a Wall?

Mar 13, 2005 · Replies 30 · Mar 27, 2005

2

Replies: 30

Views: 10K

What Is Needed To Make An Intelligent Species?

Feb 23, 2005 · Replies 72 · Mar 26, 2005

3

Replies: 72

Views: 11K

Your Definition Of An Earth-Like Planet?

Mar 26, 2005 · Replies 2 · Mar 26, 2005

Replies: 2

Views: 3K

Angular momentum of galaxy disks

Mar 22, 2005 · Replies 4 · Mar 26, 2005

Replies: 4

Views: 3K

Is There an Unknown Source of Energy Contributing to Our Universe's Expansion?

Mar 24, 2005 · Replies 2 · Mar 26, 2005

Replies: 2

Views: 2K

Would Different Laws Of Physics Affect Gravity?

Mar 22, 2005 · Replies 11 · Mar 26, 2005

Replies: 11

Views: 5K

Dark Matter & Energy/Mass of False Vacuum

Mar 20, 2005 · Replies 16 · Mar 25, 2005

Replies: 16

Views: 6K

Oh great, unmoderated alien communications

Mar 24, 2005 · Replies 4 · Mar 24, 2005

Replies: 4

Views: 2K

What is the comet's speed at its perihelion

Mar 23, 2005 · Replies 2 · Mar 24, 2005

Replies: 2

Views: 6K

Is the Vacuum the Same as Quantum Foam?

Mar 22, 2005 · Replies 5 · Mar 23, 2005

Replies: 5

Views: 3K

Explore the Mysteries of Neptune's Magnetic Field

Mar 17, 2005 · Replies 10 · Mar 23, 2005

Replies: 10

Views: 3K

How do we apply the Friedman solution to a fluid with constant pressure and energy density?

Mar 22, 2005 · Replies 7 · Mar 23, 2005

Replies: 7

Views: 2K

Relation between Mass and distance between two objects

Mar 19, 2005 · Replies 6 · Mar 23, 2005

Replies: 6

Views: 18K

Alternating planetary phase layers

Mar 21, 2005 · Replies 2 · Mar 23, 2005

Replies: 2

Views: 2K

Stargazing Are There Internet Based Telescopes Available for Public Use?

Mar 19, 2005 · Replies 5 · Mar 23, 2005

Replies: 5

Views: 4K

Is the 2nd Big Bang Theory Just Hype?

Mar 23, 2005 · Replies 2 · Mar 23, 2005

Replies: 2

Views: 2K

How Does Dark Matter Avoid Gravitational Collapse?

Mar 23, 2005 · Replies 2 · Mar 23, 2005

Replies: 2

Views: 3K

What Topics Can I Explore About Singularity for My Oral Presentation?

Mar 22, 2005 · Replies 4 · Mar 23, 2005

Replies: 4

Views: 5K

Astrophysics -What actually is this?

Jan 22, 2005 · Replies 7 · Mar 22, 2005

Replies: 7

Views: 7K

Measuring Io's Velocity Spectra: The Importance of Spectrometer Sensitivity

Mar 21, 2005 · Replies 2 · Mar 22, 2005

Replies: 2

Views: 3K

The Impact of a Moonless Earth: Effects on Tides and Beyond

Mar 20, 2005 · Replies 6 · Mar 21, 2005

Replies: 6

Views: 3K

Is a Subspace Sphere Around a Star Plausible in TNG Season 6?

Mar 21, 2005 · Replies 1 · Mar 21, 2005

Replies: 1

Views: 3K

Space Love: A Comic for Astro Nerds!

Mar 18, 2005 · Replies 1 · Mar 18, 2005

Replies: 1

Views: 2K

More exoplanet equation problems :/

Mar 18, 2005 · Replies 4 · Mar 18, 2005

Replies: 4

Views: 3K

Lab Fireball at RHIC May Have Black Hole Characteristics

Mar 18, 2005 · Replies 5 · Mar 18, 2005

Replies: 5

Views: 3K

Is it safe to assume that Earth-like planets are the best

Mar 18, 2005 · Replies 9 · Mar 18, 2005

Replies: 9

Views: 3K

Has a Man-Made Black Hole Really Been Created?

Mar 18, 2005 · Replies 2 · Mar 18, 2005

Replies: 2

Views: 4K

Is NASA Shutting Down Long-Running Space Missions to Save Money?

Mar 16, 2005 · Replies 11 · Mar 17, 2005

Replies: 11

Views: 3K

Fusion Reactor: A Possible Solution to Generate Thermal Energy?

Mar 17, 2005 · Replies 6 · Mar 17, 2005

Replies: 6

Views: 3K

Relative Planet Distances: Find Date/Start/Destination Distances

Mar 14, 2005 · Replies 7 · Mar 17, 2005

Replies: 7

Views: 8K

What's the difference between a two sphere and a three sphere?

Mar 17, 2005 · Replies 1 · Mar 17, 2005

Replies: 1

Views: 3K

What is the theoretical limit on the mass of stars and has it been observed?

Mar 8, 2005 · Replies 14 · Mar 17, 2005

Replies: 14

Views: 4K

I saw an article in New Scientist re CBR

Mar 16, 2005 · Replies 1 · Mar 16, 2005

Replies: 1

Views: 3K

Is Life Common and Resilient in the Universe?

Mar 12, 2005 · Replies 18 · Mar 16, 2005

Replies: 18

Views: 3K

What happens if you travel faster than the Speed of light

Mar 15, 2005 · Replies 3 · Mar 16, 2005

Replies: 3

Views: 3K

What Happened Before the First Planck Time?

Mar 16, 2005 · Replies 2 · Mar 16, 2005

Replies: 2

Views: 3K

Dark energy = dark matter*speed of light squared?

Mar 12, 2005 · Replies 14 · Mar 16, 2005

Replies: 14

Views: 16K

Is the Theory of Gravitational Waves Dead if Advanced LIGO Fails to Detect Them?

Mar 15, 2005 · Replies 10 · Mar 16, 2005

Replies: 10

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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