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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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Earth's Orbit: Why Is It Not Circular?

Mar 15, 2005 · Replies 5 · Mar 16, 2005

Replies: 5

Views: 4K

Galaxies Accelerating at End of Universe: Big Bang Theory Wrong?

Mar 9, 2005 · Replies 5 · Mar 16, 2005

Replies: 5

Views: 3K

Can we calculate the Schwarzschild radius of an object without knowing its mass?

Mar 12, 2005 · Replies 5 · Mar 15, 2005

Replies: 5

Views: 3K

Which textbook is best for studying gravitation and cosmology?

Mar 14, 2005 · Replies 4 · Mar 15, 2005

Replies: 4

Views: 2K

What happends to light before it reaches us?

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

Replies: 3

Views: 4K

Exoplanet Dynamics: Investigating Planet Migration

Mar 13, 2005 · Replies 7 · Mar 14, 2005

Replies: 7

Views: 3K

What exactly is it being bent by gravity?

Mar 13, 2005 · Replies 6 · Mar 14, 2005

Replies: 6

Views: 4K

Where did the energy in the CMB go to?

Mar 2, 2005 · Replies 65 · Mar 14, 2005

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Replies: 65

Views: 13K

Can Cosmic Inflation Explain the Accelerating Universe?

Mar 13, 2005 · Replies 2 · Mar 14, 2005

Replies: 2

Views: 3K

What Is the Difference Between Flux and Intensity in Astronomy?

Mar 13, 2005 · Replies 1 · Mar 13, 2005

Replies: 1

Views: 23K

Starless Galaxies: BBC Report on Dark Matter Discovery

Feb 23, 2005 · Replies 33 · Mar 13, 2005

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Replies: 33

Views: 7K

Flatness Problem: Understanding Resolution in Big Bang Model

Mar 13, 2005 · Replies 5 · Mar 13, 2005

Replies: 5

Views: 3K

Satellite Orbit: Effects of Rocket Thrusts

Nov 6, 2004 · Replies 13 · Mar 13, 2005

Replies: 13

Views: 6K

CCC-I: Challenging Observations & New Picture of the Universe

Feb 18, 2005 · Replies 60 · Mar 12, 2005

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Replies: 60

Views: 9K

How did globular clusters get their properties?

Mar 10, 2005 · Replies 6 · Mar 12, 2005

Replies: 6

Views: 3K

VIRGOHI21 & MOND: A New Challenge?

Mar 6, 2005 · Replies 6 · Mar 12, 2005

Replies: 6

Views: 3K

Dark matter galaxies, stars and planetoids

Mar 10, 2005 · Replies 8 · Mar 11, 2005

Replies: 8

Views: 4K

What Lies Beyond the Edge of the Universe?

Mar 8, 2005 · Replies 16 · Mar 11, 2005

Replies: 16

Views: 7K

Hawking Radiation – Empty space virtual antiparticle-particle pairs

Mar 11, 2005 · Replies 1 · Mar 11, 2005

Replies: 1

Views: 6K

Questions for a college student in astro.

Mar 11, 2005 · Replies 4 · Mar 11, 2005

Replies: 4

Views: 3K

Unreasonable aim of the Creator?

Mar 8, 2005 · Replies 5 · Mar 11, 2005

Replies: 5

Views: 2K

What happens to matter that falls into a black hole?

Mar 10, 2005 · Replies 2 · Mar 10, 2005

Replies: 2

Views: 5K

Are there still stars being discovered?

Mar 10, 2005 · Replies 1 · Mar 10, 2005

Replies: 1

Views: 2K

Online undergraduate reading resource for Astrophysics request

Mar 9, 2005 · Replies 3 · Mar 10, 2005

Replies: 3

Views: 2K

Measuring Rotational Speed of Io w/Doppler & Relative Velocity to Jupiter

Mar 9, 2005 · Replies 1 · Mar 9, 2005

Replies: 1

Views: 2K

A search for traces of cosmic string didnt find much

Mar 7, 2005 · Replies 10 · Mar 9, 2005

Replies: 10

Views: 3K

Gravity Leak: Testing the Theory w/ Earth-Moon Mirrors

Mar 1, 2005 · Replies 9 · Mar 8, 2005

Replies: 9

Views: 3K

Difference between flare, CME and SPEs

Jan 26, 2005 · Replies 3 · Mar 8, 2005

Replies: 3

Views: 6K

What is the connection between dark energy and dark matter?

Mar 7, 2005 · Replies 3 · Mar 7, 2005

Replies: 3

Views: 3K

Astronomy is the oldest of the physical sciences

Mar 5, 2005 · Replies 4 · Mar 7, 2005

Replies: 4

Views: 8K

What does it mean for the universe to be "flat"?

Mar 6, 2005 · Replies 2 · Mar 7, 2005

Replies: 2

Views: 3K

SciAm Lineweaver cosmology article, March issue

Mar 6, 2005 · Replies 5 · Mar 7, 2005

Replies: 5

Views: 3K

Do 3D and 4D Universes Share the Same Geometry?

Mar 5, 2005 · Replies 3 · Mar 7, 2005

Replies: 3

Views: 4K

How Do Scientists Determine Exoplanet Characteristics from Radial Velocity Data?

Feb 24, 2005 · Replies 13 · Mar 6, 2005

Replies: 13

Views: 3K

What is the upper and lower bound for reionization?

Mar 5, 2005 · Replies 16 · Mar 6, 2005

Replies: 16

Views: 3K

Several moons in the Saturn system

Feb 24, 2005 · Replies 6 · Mar 5, 2005

Replies: 6

Views: 3K

Local Pristine Primordial Material

Mar 4, 2005 · Replies 12 · Mar 5, 2005

Replies: 12

Views: 3K

Blackbody Radiation: Temperature of Accreted Gas

Feb 28, 2005 · Replies 7 · Mar 4, 2005

Replies: 7

Views: 4K

Will an Astronaut Float at the Positional Median Between Earth and Moon?

Mar 3, 2005 · Replies 3 · Mar 4, 2005

Replies: 3

Views: 14K

How do Gravitons escape from a Black Hole?

Mar 2, 2005 · Replies 11 · Mar 4, 2005

Replies: 11

Views: 12K

9 Billion-Year-Old Galaxy Discovered

Mar 3, 2005 · Replies 4 · Mar 3, 2005

Replies: 4

Views: 3K

Will NASA's Future Missions Be Impacted by Funding Challenges?

Mar 2, 2005 · Replies 2 · Mar 3, 2005

Replies: 2

Views: 2K

Stargazing Long-exposure mod for the quickcam

Dec 19, 2004 · Replies 12 · Mar 2, 2005

Replies: 12

Views: 2K

Can Black Holes Alter the Movement of the Universe Through Light Bending?

Jan 12, 2005 · Replies 13 · Mar 2, 2005

Replies: 13

Views: 3K

Why is our galaxy's dark matter distribution non-spherical?

Mar 2, 2005 · Replies 4 · Mar 2, 2005

Replies: 4

Views: 3K

Brightest Explosion Ever Observed

Feb 19, 2005 · Replies 10 · Mar 2, 2005

Replies: 10

Views: 3K

What color would the end star be if a red star and a blue star collided?

Mar 2, 2005 · Replies 3 · Mar 2, 2005

Replies: 3

Views: 4K

How is the Distance Between Stars Measured?

Mar 2, 2005 · Replies 1 · Mar 2, 2005

Replies: 1

Views: 6K

Why Do Globular Clusters Maintain Their Shape Over Billions of Years?

Mar 2, 2005 · Replies 2 · Mar 2, 2005

Replies: 2

Views: 2K

Initial condition of the restricted problem of three bodies

Feb 26, 2005 · Replies 11 · Mar 2, 2005

Replies: 11

Views: 3K

Do Black Holes and the Big Bang Singularity Reflect Maximum Entropy?

Jan 8, 2005 · Replies 5 · Mar 2, 2005

Replies: 5

Views: 2K

Weyl Curvature Hypothesis and entropy

Oct 16, 2004 · Replies 18 · Mar 2, 2005

Replies: 18

Views: 7K

What is the significance of the recently discovered nearby newborn galaxies?

Mar 1, 2005 · Replies 2 · Mar 2, 2005

Replies: 2

Views: 2K

How Can You Measure Star Distances Using Ancient Astronomical Techniques?

Mar 1, 2005 · Replies 6 · Mar 2, 2005

Replies: 6

Views: 3K

Higgs ocean, dark energy and quantum fluctuations: related manifestations?

Feb 28, 2005 · Replies 5 · Mar 1, 2005

Replies: 5

Views: 3K

Turning Matter into Energy and Back: Is It Possible?

Jan 31, 2005 · Replies 14 · Mar 1, 2005

Replies: 14

Views: 3K

Could Other Universes Fine-Tune Their Own Inhabitants?

Feb 28, 2005 · Replies 3 · Mar 1, 2005

Replies: 3

Views: 3K

What is the latest research on CMB anisotropy and its implications?

Mar 1, 2005 · Replies 2 · Mar 1, 2005

Replies: 2

Views: 2K

Cosmology: Sales Pitch or Science?

Feb 22, 2005 · Replies 5 · Mar 1, 2005

Replies: 5

Views: 6K

Crisis in Cosmology: CCC-I Conference Challenges Observations

Mar 1, 2005 · Replies 1 · Mar 1, 2005

Replies: 1

Views: 2K

Send Your Name to Pluto | Join NASA's Latest PR Idea and Make History!

Feb 27, 2005 · Replies 4 · Mar 1, 2005

Replies: 4

Views: 4K

Cyclical Universe: Spontaneous Inflation & Time's Arrow

Feb 23, 2005 · Replies 8 · Feb 28, 2005

Replies: 8

Views: 3K

Is there a maximum mass limit for stars in the universe?

Feb 27, 2005 · Replies 4 · Feb 28, 2005

Replies: 4

Views: 10K

Shape of the Universe: Interaction of Forces & Evolution

Feb 25, 2005 · Replies 9 · Feb 27, 2005

Replies: 9

Views: 3K

Can we please look for 'New Earth' at Alpha Centauri?

Feb 26, 2005 · Replies 3 · Feb 27, 2005

Replies: 3

Views: 4K

Black holes bend light the wrong way

Feb 24, 2005 · Replies 6 · Feb 27, 2005

Replies: 6

Views: 3K

Calculating the Centre of Mass in a 2-Body System

Feb 26, 2005 · Replies 1 · Feb 26, 2005

Replies: 1

Views: 3K

Can the Moon's rotation be affected by Earth's tides?

Feb 25, 2005 · Replies 5 · Feb 26, 2005

Replies: 5

Views: 8K

New MOND Papers: Jacob Bekenstein’s TeVeS Breakthrough

Feb 23, 2005 · Replies 3 · Feb 25, 2005

Replies: 3

Views: 5K

Interstellar propulsion island hopping the Oort cloud

Feb 25, 2005 · Replies 2 · Feb 25, 2005

Replies: 2

Views: 3K

Moons with Moons: Solar System Possiblities

Feb 7, 2005 · Replies 9 · Feb 25, 2005

Replies: 9

Views: 4K

Why are the theoretical and measured sizes/ages of the universe so similar?

Feb 24, 2005 · Replies 14 · Feb 25, 2005

Replies: 14

Views: 3K

Help with Orbit Sim: 2-Body Anomalous Motion Problem

Feb 24, 2005 · Replies 2 · Feb 24, 2005

Replies: 2

Views: 3K

Unveiling the Mysteries of Gravity Waves: Origins and Properties Explained"

Feb 20, 2005 · Replies 11 · Feb 24, 2005

Replies: 11

Views: 6K

A body intermediate to stars and galaxies

Feb 20, 2005 · Replies 3 · Feb 24, 2005

Replies: 3

Views: 2K

Boarder of Universe: What Makes It & Can It Change?

Feb 10, 2005 · Replies 30 · Feb 24, 2005

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Replies: 30

Views: 5K

How is exoplanet mass found by astrometry?

Feb 23, 2005 · Replies 10 · Feb 23, 2005

Replies: 10

Views: 5K

Accelerated expansion: is the jury still out?

Feb 21, 2005 · Replies 3 · Feb 22, 2005

Replies: 3

Views: 3K

Astronomy & Cosmology: What's the Difference?

Feb 22, 2005 · Replies 2 · Feb 22, 2005

Replies: 2

Views: 4K

Solving the Energy Crisis on a Methane-Rich Planet

Feb 12, 2005 · Replies 5 · Feb 22, 2005

Replies: 5

Views: 3K

Is There a Significant Shift in the Triple-Alpha Process?

Jan 15, 2005 · Replies 5 · Feb 20, 2005

Replies: 5

Views: 3K

Cosmological Principle: Finite or Finiteless Universe?

Feb 19, 2005 · Replies 4 · Feb 20, 2005

Replies: 4

Views: 3K

Let's think crack u'r brain with this qn.

Feb 19, 2005 · Replies 1 · Feb 19, 2005

Replies: 1

Views: 2K

Is the Andromeda Galaxy going to collide with the Milky Way?

Feb 17, 2005 · Replies 9 · Feb 18, 2005

Replies: 9

Views: 8K

Could S Meson Explain Dark Matter?

Feb 18, 2005 · Replies 1 · Feb 18, 2005

Replies: 1

Views: 3K

Unraveling the Mystery of Pluto: 75 Years Since Its Discovery and Counting

Feb 14, 2005 · Replies 5 · Feb 18, 2005

Replies: 5

Views: 3K

Average luminosity of night sky vs frequency

Feb 14, 2005 · Replies 5 · Feb 17, 2005

Replies: 5

Views: 3K

How much radiation comes in contact with the martian surface?

Feb 15, 2005 · Replies 2 · Feb 17, 2005

Replies: 2

Views: 3K

Is the Pioneer Anomaly Explained by Topological Phase Defects of Light?

Feb 17, 2005 · Replies 1 · Feb 17, 2005

Replies: 1

Views: 3K

Is There Evidence of Life on Mars?

Feb 16, 2005 · Replies 3 · Feb 17, 2005

Replies: 3

Views: 4K

Over density of galaxies at z=5.9

Feb 11, 2005 · Replies 18 · Feb 16, 2005

Replies: 18

Views: 4K

Why Does the Solar System's Angular Momentum Distribution Appear Anomalous?

Jan 21, 2005 · Replies 1 · Feb 13, 2005

Replies: 1

Views: 3K

Have Scientists Discovered the Smallest Exoplanet Yet?

Feb 11, 2005 · Replies 2 · Feb 13, 2005

Replies: 2

Views: 3K

What is the significance of being in the eigenspace of Christ?

Jan 28, 2005 · Replies 8 · Feb 13, 2005

Replies: 8

Views: 3K

Habitable Star Systems: Where Can We Find Maggie Turnbull's Catalogue?

Feb 11, 2005 · Replies 1 · Feb 13, 2005

Replies: 1

Views: 3K

Help with planetary temp. equation

Feb 11, 2005 · Replies 7 · Feb 13, 2005

Replies: 7

Views: 3K

A Universe That Is More Life-Producing?

Feb 8, 2005 · Replies 16 · Feb 12, 2005

Replies: 16

Views: 4K

Twisted Meteor Train - A Sight to Behold

Feb 12, 2005 · Replies 1 · Feb 12, 2005

Replies: 1

Views: 3K

Finding a Formula for Determining G Forces in Space Travel

Jan 22, 2005 · Replies 12 · Feb 11, 2005

Replies: 12

Views: 6K

Can We Talk of Points of Space?

Jan 18, 2005 · Replies 10 · Feb 11, 2005

Replies: 10

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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