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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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How Do You Convert Monochromatic Flux Between Wavelength and Frequency Units?

Feb 27, 2008 · Replies 1 · Feb 27, 2008

Replies: 1

Views: 5K

Would Two Identical Planets Opposite Each Other Coalesce Over Time?

Feb 25, 2008 · Replies 4 · Feb 27, 2008

Replies: 4

Views: 3K

Stargazing How to Buy a Telescope for Under $150?

Feb 26, 2008 · Replies 9 · Feb 27, 2008

Replies: 9

Views: 4K

Quantum Cosmology Evidence: String, Brane & LQC

Feb 27, 2008 · Replies 1 · Feb 27, 2008

Replies: 1

Views: 3K

Can Black Holes Explode Back into Normal Matter After Evaporation?

Feb 25, 2008 · Replies 2 · Feb 27, 2008

Replies: 2

Views: 3K

How does black hole evaporation end?

Feb 23, 2008 · Replies 9 · Feb 27, 2008

Replies: 9

Views: 5K

Stellar Evolution: Pathways & Perturbations

Feb 26, 2008 · Replies 1 · Feb 27, 2008

Replies: 1

Views: 3K

The Boltzmann distribution of uniformly spaced energy levels

Feb 25, 2008 · Replies 2 · Feb 25, 2008

Replies: 2

Views: 8K

What is the maximum gravity gradient a human can tolerate near a black hole?

Nov 4, 2005 · Replies 25 · Feb 25, 2008

Replies: 25

Views: 13K

Stars twinkle, but planets don't?

Feb 25, 2008 · Replies 1 · Feb 25, 2008

Replies: 1

Views: 8K

What is the difference between cosmology and astrophysics

Feb 24, 2008 · Replies 6 · Feb 25, 2008

Replies: 6

Views: 5K

Stargazing Total eclipse of the moon tonight.

Feb 20, 2008 · Replies 76 · Feb 25, 2008

3

Replies: 76

Views: 13K

Stargazing Catching the Eclipse Last Night: A Tale of Cold and Clear Skies

Feb 21, 2008 · Replies 11 · Feb 24, 2008

Replies: 11

Views: 4K

What causes gravity? Is it mass or weight?

Feb 14, 2008 · Replies 15 · Feb 23, 2008

Replies: 15

Views: 5K

Can Gravity Really Repel? Understanding Gravitons and Common Misconceptions

Sep 27, 2005 · Replies 31 · Feb 23, 2008

2

Replies: 31

Views: 29K

Shooting the moon. did i get a space station?

Feb 20, 2008 · Replies 2 · Feb 22, 2008

Replies: 2

Views: 3K

How Does Solid Hydrogen Influence Astrophysics?

Feb 18, 2008 · Replies 2 · Feb 22, 2008

Replies: 2

Views: 5K

What are the mysteries of the Big Bang and the universe's expansion?

Feb 10, 2008 · Replies 27 · Feb 22, 2008

Replies: 27

Views: 6K

Research Help: Get Info on 9 Planets

Feb 21, 2008 · Replies 3 · Feb 21, 2008

Replies: 3

Views: 3K

The spectrum of reflected light from a planet question.

Feb 21, 2008 · Replies 3 · Feb 21, 2008

Replies: 3

Views: 6K

Ultimate fate of ISS (International Space Station)

Feb 19, 2008 · Replies 5 · Feb 20, 2008

Replies: 5

Views: 5K

The Milky Way is twice the size we thought it was

Feb 20, 2008 · Replies 2 · Feb 20, 2008

Replies: 2

Views: 3K

Protecting Craft from Solar Wind: How Far Does Our Magnetic Field Reach?

Feb 12, 2008 · Replies 2 · Feb 20, 2008

Replies: 2

Views: 4K

Human in outer space without space suit

Feb 11, 2008 · Replies 20 · Feb 19, 2008

Replies: 20

Views: 25K

Dark matter and the Standard Model

Feb 4, 2008 · Replies 17 · Feb 19, 2008

Replies: 17

Views: 6K

Is Dark Matter Just Unseen Molecules?

Feb 14, 2008 · Replies 12 · Feb 19, 2008

Replies: 12

Views: 5K

How Can Astrophysicists Be Rescued from Mars Using Special Relativity?

Feb 18, 2008 · Replies 8 · Feb 19, 2008

Replies: 8

Views: 4K

SETI: What would it take to monitor all probable bands.

Feb 17, 2008 · Replies 4 · Feb 17, 2008

Replies: 4

Views: 3K

Mastering Optical Depth: Simplifying the Concept for Beginners

Feb 12, 2008 · Replies 10 · Feb 17, 2008

Replies: 10

Views: 3K

How Can We Improve Our Community Together?

Feb 16, 2008 · Replies 4 · Feb 17, 2008

Replies: 4

Views: 3K

What Happens to Matter Before a Black Hole Collapses?

Jan 14, 2008 · Replies 5 · Feb 16, 2008

Replies: 5

Views: 3K

Do You Believe in the Big Rip Theory?

Feb 7, 2008 · Replies 3 · Feb 13, 2008

Replies: 3

Views: 3K

Is dark matter essential for understanding galaxy interactions in clusters?

Feb 8, 2008 · Replies 3 · Feb 13, 2008

Replies: 3

Views: 5K

Understanding Schwarzschild Radius Formula & Escape Velocity Calculation

Feb 6, 2008 · Replies 1 · Feb 13, 2008

Replies: 1

Views: 6K

What is the radial density distribution of a neutron star?

Feb 13, 2008 · Replies 3 · Feb 13, 2008

Replies: 3

Views: 6K

Does Our Velocity Relative to the Black Hole Affect the Passage of Time?

Feb 13, 2008 · Replies 2 · Feb 13, 2008

Replies: 2

Views: 2K

Planets & Moons Orbit: Earth, Uranus, Neptune, Jupiter, Mars, Pluto, etc.

Feb 11, 2008 · Replies 1 · Feb 11, 2008

Replies: 1

Views: 8K

Solving Orbital Plane Alignment of Two Planets

Jan 30, 2008 · Replies 3 · Feb 9, 2008

Replies: 3

Views: 6K

Are Alternative Explanations for Dark Matter Being Overlooked?

Feb 9, 2008 · Replies 2 · Feb 9, 2008

Replies: 2

Views: 2K

Can Gamma Rays Reveal Their Source?

Feb 9, 2008 · Replies 5 · Feb 9, 2008

Replies: 5

Views: 3K

Estimating Photon Escape Time from Center of Sun

Feb 8, 2008 · Replies 2 · Feb 8, 2008

Replies: 2

Views: 3K

Neutron degenerate matter as dark matter

Feb 7, 2008 · Replies 4 · Feb 8, 2008

Replies: 4

Views: 7K

Creating a Planet of Sky and Clouds: Is it Possible?

Feb 6, 2008 · Replies 3 · Feb 8, 2008

Replies: 3

Views: 4K

Hubble Expansion: Moon Orbital Distance & Error Check

Feb 7, 2008 · Replies 3 · Feb 7, 2008

Replies: 3

Views: 3K

Is it possible to create Orbital construction yards for Spaceships?

Feb 5, 2008 · Replies 6 · Feb 7, 2008

Replies: 6

Views: 5K

What Would Happen if the Earth's Axis was Vertical to the Solar System?

Feb 3, 2008 · Replies 7 · Feb 6, 2008

Replies: 7

Views: 6K

When a supernova occurs is it expected that the gravity wave

Feb 6, 2008 · Replies 3 · Feb 6, 2008

Replies: 3

Views: 6K

Can Low-Cost Methods Be Used to Launch Objects into Orbit?

Jan 5, 2008 · Replies 3 · Feb 6, 2008

Replies: 3

Views: 3K

Pulsars vs. Brown Dwarves & Blue Giants: A Celestial Q&A

Feb 5, 2008 · Replies 1 · Feb 6, 2008

Replies: 1

Views: 2K

What happens when one's gravity attracts the other?

Feb 5, 2008 · Replies 7 · Feb 6, 2008

Replies: 7

Views: 3K

Stargazing What Size and Material Should I Use for My Refractor Telescope Tube?

Feb 5, 2008 · Replies 1 · Feb 5, 2008

Replies: 1

Views: 4K

(problem) Spherical trigonometry and star declination

Jan 26, 2008 · Replies 4 · Feb 5, 2008

Replies: 4

Views: 12K

Stargazing Can we see human history through a telescope?

Feb 4, 2008 · Replies 5 · Feb 5, 2008

Replies: 5

Views: 5K

Dimensional analysis on Luminosity

Feb 1, 2008 · Replies 6 · Feb 5, 2008

Replies: 6

Views: 5K

Stargazing Optic Quality and Useful Magnification of the Orion Skyview Pro 6 Telescope

Jan 29, 2008 · Replies 17 · Feb 5, 2008

Replies: 17

Views: 7K

How Does Heat Transfer Occur in Neutron Stars?

Feb 4, 2008 · Replies 1 · Feb 4, 2008

Replies: 1

Views: 3K

Stargazing Can i use a watch glass as a primary mirror of dobsonian telescope?

Feb 3, 2008 · Replies 2 · Feb 4, 2008

Replies: 2

Views: 3K

Applying Runge-Kutta(RK4) method to planetary velocity

Feb 3, 2008 · Replies 9 · Feb 4, 2008

Replies: 9

Views: 10K

Can Dark Matter and Black Holes be Associated in Earth's Rotation?

Jan 31, 2008 · Replies 55 · Feb 3, 2008

2

Replies: 55

Views: 16K

Stargazing Magnification of dobsonian telescope

Feb 1, 2008 · Replies 1 · Feb 1, 2008

Replies: 1

Views: 3K

Calculating Optical Interferometry Telescope Resolution

Feb 1, 2008 · Replies 2 · Feb 1, 2008

Replies: 2

Views: 4K

Black Hole Temperature and Entropy

Dec 22, 2007 · Replies 5 · Jan 31, 2008

Replies: 5

Views: 18K

Analemma Visualisation: 3D Graphics & Visualisations

Jan 28, 2008 · Replies 1 · Jan 31, 2008

Replies: 1

Views: 4K

Stargazing Primary mirror for dobsonian telescope

Jan 31, 2008 · Replies 1 · Jan 31, 2008

Replies: 1

Views: 5K

Graph Right Ascension & Declination on Globe Graph

Jan 26, 2008 · Replies 7 · Jan 30, 2008

Replies: 7

Views: 8K

Is Dark Matter a solid, gas or liquid?

Jan 23, 2008 · Replies 23 · Jan 30, 2008

Replies: 23

Views: 11K

Altitude and Azimuth of the Sun on the Summer Solstice at the Tropic of Cancer

Jan 29, 2008 · Replies 4 · Jan 29, 2008

Replies: 4

Views: 6K

Can Two Black Holes Really Collide, Even If They Were Once Stars?

Jan 25, 2008 · Replies 8 · Jan 28, 2008

Replies: 8

Views: 4K

Theoretical Resolution of Hubble

Jan 27, 2008 · Replies 5 · Jan 28, 2008

Replies: 5

Views: 4K

Final temperature in a de-Sitter universe

Feb 12, 2004 · Replies 10 · Jan 28, 2008

Replies: 10

Views: 6K

Understanding Life Support Systems

Jan 17, 2008 · Replies 11 · Jan 28, 2008

Replies: 11

Views: 4K

Apparent Magnitude of planets as seen from earth

Jan 24, 2008 · Replies 2 · Jan 27, 2008

Replies: 2

Views: 13K

Stargazing Question on Refractor Telescope

Dec 17, 2007 · Replies 6 · Jan 26, 2008

Replies: 6

Views: 5K

Spectral and Luminosity Classification

Jan 24, 2008 · Replies 2 · Jan 26, 2008

Replies: 2

Views: 4K

Stargazing 101: Adjusting for Hemisphere

Jan 26, 2008 · Replies 1 · Jan 26, 2008

Replies: 1

Views: 3K

Accelerating Motion in Space: Virtual Particles?

Jan 26, 2008 · Replies 1 · Jan 26, 2008

Replies: 1

Views: 6K

Orbit Semimajor Axis and Eccentricity after increasing V

Jan 23, 2008 · Replies 2 · Jan 26, 2008

Replies: 2

Views: 9K

Discovering Anomalies: Extra-Galactic Meteor Observed by Russian Scientists"

Jan 25, 2008 · Replies 4 · Jan 25, 2008

Replies: 4

Views: 4K

Neutron degeneracy pressure and electron degeneracy pressure

Jan 19, 2008 · Replies 7 · Jan 25, 2008

Replies: 7

Views: 20K

Need Help Creating Moons for Fiction Story

Jan 25, 2008 · Replies 5 · Jan 25, 2008

Replies: 5

Views: 3K

Rotational Forces in Galaxies: Gas & Beyond

Jan 17, 2008 · Replies 12 · Jan 25, 2008

Replies: 12

Views: 5K

The creation of our solar system?

Jan 20, 2008 · Replies 1 · Jan 25, 2008

Replies: 1

Views: 5K

Question about infinite space and time

Jan 24, 2008 · Replies 1 · Jan 24, 2008

Replies: 1

Views: 3K

Why 24 hours for right ascension?

Jan 18, 2008 · Replies 9 · Jan 24, 2008

Replies: 9

Views: 6K

A Galaxy Beyond Gravity and the Hubble Flow

Jan 19, 2008 · Replies 6 · Jan 23, 2008

Replies: 6

Views: 3K

Stargazing How to Make a Parabolic Mirror for a Telescope at Home?

Jan 16, 2008 · Replies 2 · Jan 22, 2008

Replies: 2

Views: 5K

First pictures From Mercury in 30 yrs.

Jan 17, 2008 · Replies 2 · Jan 21, 2008

Replies: 2

Views: 3K

What Are the Best References for Exoplanet Data and Information?

Jan 21, 2008 · Replies 3 · Jan 21, 2008

Replies: 3

Views: 3K

The ecliptic planes of the Milky Way and the solar system

Jan 17, 2008 · Replies 4 · Jan 21, 2008

Replies: 4

Views: 13K

Quick question with regards to self-study

Jan 18, 2008 · Replies 3 · Jan 21, 2008

Replies: 3

Views: 2K

Is String Theory Consistent with MOND and TeVeS?

Jan 20, 2008 · Replies 1 · Jan 21, 2008

Replies: 1

Views: 3K

Stargazing Want to run out and buy a better telescope

Jan 21, 2008 · Replies 2 · Jan 21, 2008

Replies: 2

Views: 1K

Stargazing Meade 10" Starfinder EQ Telescope - Buy Now on eBay

Jan 2, 2008 · Replies 3 · Jan 21, 2008

Replies: 3

Views: 4K

Questions About Space: Is Travel Circular? Can You Reach Big Bang Light?

Jan 19, 2008 · Replies 4 · Jan 20, 2008

Replies: 4

Views: 3K

Kepler's Law: Error Analysis & Mass of Earth

Jan 16, 2008 · Replies 3 · Jan 20, 2008

Replies: 3

Views: 12K

How do i find out how much energy a 20solar M BH would radiate given that

Dec 26, 2007 · Replies 2 · Jan 20, 2008

Replies: 2

Views: 2K

Help finding Kip Thorne web course

Jan 20, 2008 · Replies 3 · Jan 20, 2008

Replies: 3

Views: 3K

SPACE.com: Source of Mysterious Antimatter Found

Jan 16, 2008 · Replies 5 · Jan 19, 2008

Replies: 5

Views: 4K

Mirroring sun with parabolic dish

Jan 16, 2008 · Replies 6 · Jan 18, 2008

Replies: 6

Views: 5K

Neutron Star Mass: Understanding the Chandrasekhar Limit

Jan 18, 2008 · Replies 1 · Jan 18, 2008

Replies: 1

Views: 4K

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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