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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 from Mars: Why is it Blurry? | CNN Exclusive

May 23, 2003 · Replies 3 · May 27, 2003

Replies: 3

Views: 4K

Vipers amazing theroy on life in the universe

May 26, 2003 · Replies 5 · May 27, 2003

Replies: 5

Views: 3K

What is the name of the Milky Way's satellite galaxy?

May 26, 2003 · Replies 1 · May 27, 2003

Replies: 1

Views: 4K

Local Group Direction & Solar System CMB Motion

May 23, 2003 · Replies 2 · May 26, 2003

Replies: 2

Views: 4K

How does this oscillating electromagnetic field keep its information?

May 25, 2003 · Replies 13 · May 26, 2003

Replies: 13

Views: 4K

Gravity & Vacuum in General Relativity: Is Space Flat?

May 23, 2003 · Replies 10 · May 26, 2003

Replies: 10

Views: 5K

Space: Is it a place? Or is it a physical entity?

May 24, 2003 · Replies 20 · May 26, 2003

Replies: 20

Views: 10K

How does the rotation of the earth around the axis bring about changes

May 26, 2003 · Replies 3 · May 26, 2003

Replies: 3

Views: 4K

Poll

What is your guess at Drake's answer?

May 25, 2003 · Replies 5 · May 25, 2003

Replies: 5

Views: 3K

Are There Stars Primarily Composed of Helium?

May 24, 2003 · Replies 3 · May 24, 2003

Replies: 3

Views: 3K

3pi/Lambda = area of cosmological horizon

May 24, 2003 · Replies 1 · May 24, 2003

Replies: 1

Views: 3K

Cosmological redshift: how much energy has gone missing?

May 12, 2003 · Replies 37 · May 24, 2003

2

Replies: 37

Views: 9K

Lee Smolin predicted dark energy back in 1995

May 24, 2003 · Replies 2 · May 24, 2003

Replies: 2

Views: 3K

Star Birth: Process & Gravity Effects

May 20, 2003 · Replies 3 · May 23, 2003

Replies: 3

Views: 4K

A toolkit for working with natural units

May 19, 2003 · Replies 18 · May 22, 2003

Replies: 18

Views: 6K

One theory is that the higgs particle gives matter mass

Apr 26, 2003 · Replies 8 · May 22, 2003

Replies: 8

Views: 4K

What are the galactic coordinates of the Cosmic Microwave Background hotspot?

May 22, 2003 · Replies 1 · May 22, 2003

Replies: 1

Views: 2K

How long before the sun goes red giant?

May 19, 2003 · Replies 10 · May 22, 2003

Replies: 10

Views: 12K

What is the quantitative understanding of Hawking radiation from a black hole?

May 16, 2003 · Replies 27 · May 21, 2003

Replies: 27

Views: 6K

Poll

What prevents black hole singularities from being reached?

May 20, 2003 · Replies 6 · May 20, 2003

Replies: 6

Views: 3K

Understanding Rho Crit: The Critical Density of the Universe

May 17, 2003 · Replies 3 · May 20, 2003

Replies: 3

Views: 5K

Poll

What is the critical density of the universe?

May 16, 2003 · Replies 12 · May 20, 2003

Replies: 12

Views: 39K

SauwIs the concept of finite space in infinite time scientifically valid?

May 8, 2003 · Replies 56 · May 19, 2003

2

Replies: 56

Views: 14K

Are fundamental physical laws dependent on our choice of units of measurement?

May 11, 2003 · Replies 25 · May 19, 2003

Replies: 25

Views: 6K

Are There Explanations for Solar Neutrino Anomalies and Hot Jupiters?

May 15, 2003 · Replies 9 · May 18, 2003

Replies: 9

Views: 4K

Stargazing Effects of a massive object on light and its relation to the 1919 Eclipse

May 18, 2003 · Replies 4 · May 18, 2003

Replies: 4

Views: 3K

What's your favorite brief survey of modern cosmology?

May 18, 2003 · Replies 1 · May 18, 2003

Replies: 1

Views: 3K

Stargazing Check Out the Lunar Eclipse Tonight - Night Calculator

May 15, 2003 · Replies 5 · May 18, 2003

Replies: 5

Views: 4K

Question re GP-3 orbiting gyroscopes test of relativity

May 13, 2003 · Replies 2 · May 18, 2003

Replies: 2

Views: 3K

Z/A in the Chandrasekhar formula

May 17, 2003 · Replies 1 · May 17, 2003

Replies: 1

Views: 4K

What Are the Mysteries Behind Gravity and Its Theoretical Perspectives?

May 17, 2003 · Replies 3 · May 17, 2003

Replies: 3

Views: 3K

Direct Observation: Finding Earth-Sized Exoplanets and Their Habitability

May 13, 2003 · Replies 11 · May 17, 2003

Replies: 11

Views: 3K

Early planetary formation thought

May 17, 2003 · Replies 1 · May 17, 2003

Replies: 1

Views: 3K

Is Photon Energy Lost or Conserved in Cosmological Redshift?

May 11, 2003 · Replies 25 · May 17, 2003

Replies: 25

Views: 7K

What Secrets Do Solar Rings and Shadow Matter Hold?

May 11, 2003 · Replies 1 · May 16, 2003

Replies: 1

Views: 4K

Poll

The Hawking wattage of a black hole

May 15, 2003 · Replies 2 · May 16, 2003

Replies: 2

Views: 3K

The principle of least action/time, and geodesics of spacetime

May 1, 2003 · Replies 56 · May 15, 2003

2

Replies: 56

Views: 11K

Poll

Was the first moon landing a fake?

May 12, 2003 · Replies 13 · May 15, 2003

Replies: 13

Views: 7K

Radius of cosmological mass-energy symmetry?

May 7, 2003 · Replies 8 · May 13, 2003

Replies: 8

Views: 4K

Can the Infinite Time Theory Be Refuted in Cosmology?

May 8, 2003 · Replies 25 · May 13, 2003

Replies: 25

Views: 7K

What happened before the Big Bang?

May 5, 2003 · Replies 33 · May 13, 2003

2

Replies: 33

Views: 8K

This seems kind of weird, but is there really no such thing as gravity in

May 5, 2003 · Replies 23 · May 13, 2003

Replies: 23

Views: 6K

Photon structure - light decyphering

May 10, 2003 · Replies 8 · May 12, 2003

Replies: 8

Views: 4K

Unveiling the Mystery of Comet Tails: The Role of Drag Factor

May 12, 2003 · Replies 1 · May 12, 2003

Replies: 1

Views: 3K

A great 16 page paper in quantum cosmology

May 11, 2003 · Replies 1 · May 11, 2003

Replies: 1

Views: 3K

Nything beyond the known universe boundaries?

May 8, 2003 · Replies 4 · May 10, 2003

Replies: 4

Views: 4K

Dimensionless cosmology-getting rid of units

Apr 13, 2003 · Replies 8 · May 10, 2003

Replies: 8

Views: 5K

Big Bang & Universe: Why No Bubble w/ Void?

May 8, 2003 · Replies 11 · May 10, 2003

Replies: 11

Views: 4K

Understanding the Concept of False Vacuum: Explained and Debunked

May 9, 2003 · Replies 5 · May 10, 2003

Replies: 5

Views: 8K

Age of Universe: Transit Time & Calculation

May 9, 2003 · Replies 7 · May 9, 2003

Replies: 7

Views: 4K

Has anyone considered an anti space ?

May 3, 2003 · Replies 6 · May 9, 2003

Replies: 6

Views: 6K

Are Refinements to Newton’s Calculations Necessary?

May 9, 2003 · Replies 3 · May 9, 2003

Replies: 3

Views: 3K

What is the weight of a copy at Earth's average distance from the sun?

May 4, 2003 · Replies 6 · May 9, 2003

Replies: 6

Views: 20K

Is There a Reason for the Unique Shape of This Galaxy?

May 7, 2003 · Replies 7 · May 8, 2003

Replies: 7

Views: 3K

The Physics of Immortality: Fact or Fiction?

May 7, 2003 · Replies 3 · May 7, 2003

Replies: 3

Views: 3K

What does one calorie per cubic mile mean to you?

Apr 27, 2003 · Replies 4 · May 7, 2003

Replies: 4

Views: 5K

Is Interstellar Travel Feasible with Current Physics?

Mar 25, 2003 · Replies 16 · May 7, 2003

Replies: 16

Views: 7K

Respected Linde vs Far-Out Rees: Who to Follow?

May 6, 2003 · Replies 1 · May 6, 2003

Replies: 1

Views: 3K

What are your ideas about describing Planck units?

May 3, 2003 · Replies 13 · May 6, 2003

Replies: 13

Views: 4K

Einstein was right about the speed of gravity

Apr 17, 2003 · Replies 31 · May 5, 2003

2

Replies: 31

Views: 6K

Could Black Holes Be the Key to Understanding the Universe's Origin?

Apr 12, 2003 · Replies 11 · May 5, 2003

Replies: 11

Views: 3K

S.A.R.S Could this be the result of inbound Particles

Apr 25, 2003 · Replies 30 · May 4, 2003

2

Replies: 30

Views: 6K

Alternative forms of the Friedmann equations

Apr 22, 2003 · Replies 8 · May 3, 2003

Replies: 8

Views: 5K

Anybody know the name of this mission?

May 2, 2003 · Replies 4 · May 2, 2003

Replies: 4

Views: 3K

Could Suicidal Black Holes Evolve Due to Their Charge and Hawking Radiation?

Apr 30, 2003 · Replies 6 · May 1, 2003

Replies: 6

Views: 3K

Light Acceleration Near Black Holes: The Effects on Gravity

Apr 28, 2003 · Replies 7 · Apr 30, 2003

Replies: 7

Views: 3K

If you go fast enough will you turn into a black hole

Apr 23, 2003 · Replies 8 · Apr 28, 2003

Replies: 8

Views: 4K

Are there more than two types of charges in spacetime?

Apr 25, 2003 · Replies 20 · Apr 28, 2003

Replies: 20

Views: 7K

(Not folding space) Instant Travel Form A-B? But Not Time (theory)

Apr 27, 2003 · Replies 1 · Apr 27, 2003

Replies: 1

Views: 7K

Galaxy Movement and the Big Bang Theory Explained

Apr 21, 2003 · Replies 12 · Apr 26, 2003

Replies: 12

Views: 4K

Explore the Local Space in 3D: Download Celestia for Free!

Apr 23, 2003 · Replies 2 · Apr 25, 2003

Replies: 2

Views: 4K

Measuring the Size of the Milky Way: From End to End

Apr 20, 2003 · Replies 14 · Apr 25, 2003

Replies: 14

Views: 7K

Quanitized Space & Black Hole Formation

Apr 25, 2003 · Replies 1 · Apr 25, 2003

Replies: 1

Views: 4K

Understanding the Solar Calendar: The Debate over Leap Year Frequency

Apr 24, 2003 · Replies 1 · Apr 25, 2003

Replies: 1

Views: 4K

How far does the earth travel in one year?

Apr 24, 2003 · Replies 8 · Apr 24, 2003

Replies: 8

Views: 4K

Why do galaxy clusters form sheets?

Apr 22, 2003 · Replies 5 · Apr 24, 2003

Replies: 5

Views: 4K

Why 1 dimensional discrete space?

Apr 22, 2003 · Replies 4 · Apr 23, 2003

Replies: 4

Views: 3K

What is the importance of hadronic matter in physics?

Apr 22, 2003 · Replies 2 · Apr 22, 2003

Replies: 2

Views: 6K

Einstein's Cross: Examining the Impact of Lensing Galaxies

Apr 21, 2003 · Replies 4 · Apr 22, 2003

Replies: 4

Views: 3K

Question about Finding Mass of Visual Binaries with Given Information

Apr 20, 2003 · Replies 3 · Apr 21, 2003

Replies: 3

Views: 3K

Multi-Verse: A Speculative Argument

Apr 15, 2003 · Replies 8 · Apr 20, 2003

Replies: 8

Views: 4K

Electrons in intergalactic space.

Apr 18, 2003 · Replies 3 · Apr 19, 2003

Replies: 3

Views: 5K

Cosmology Q: Is Flat Universe w/ Dust & +ve Lambda Expanding Forever?

Apr 16, 2003 · Replies 5 · Apr 18, 2003

Replies: 5

Views: 4K

Philosophy of Nature. Time and Space

Apr 8, 2003 · Replies 29 · Apr 18, 2003

Replies: 29

Views: 5K

What Are the Key Physics Concepts Behind Colliding Stars?

Apr 17, 2003 · Replies 3 · Apr 18, 2003

Replies: 3

Views: 3K

IN the Future Blackholes or Wormholes

Apr 17, 2003 · Replies 5 · Apr 17, 2003

Replies: 5

Views: 4K

Speed of Gravity = c: Does Traveling at C Affect Gravity?

Apr 10, 2003 · Replies 4 · Apr 16, 2003

Replies: 4

Views: 3K

Do Black Holes and Wormholes Affect Time and Space Similarly?

Apr 12, 2003 · Replies 3 · Apr 16, 2003

Replies: 3

Views: 8K

Is seti@home worth giving another try?

Apr 7, 2003 · Replies 18 · Apr 16, 2003

Replies: 18

Views: 5K

Is there a prediction for the frequency of a gravity wave?

Apr 14, 2003 · Replies 7 · Apr 15, 2003

Replies: 7

Views: 4K

Challenge - A problem in astronomy

Apr 14, 2003 · Replies 4 · Apr 15, 2003

Replies: 4

Views: 3K

Have you watch the movie the core?

Apr 14, 2003 · Replies 4 · Apr 15, 2003

Replies: 4

Views: 3K

Moving mass good or indifferent?

Apr 12, 2003 · Replies 4 · Apr 14, 2003

Replies: 4

Views: 3K

Is Everything a Form of Positive and Negative Space in Matter?

Apr 7, 2003 · Replies 13 · Apr 14, 2003

Replies: 13

Views: 4K

Which Voyager spacecraft traveled further: 1 or 2?

Apr 12, 2003 · Replies 3 · Apr 14, 2003

Replies: 3

Views: 5K

Skinny galaxy harbors massive black hole at core

Apr 12, 2003 · Replies 2 · Apr 13, 2003

Replies: 2

Views: 5K

How does light pollution impact birds and other wildlife?

Apr 7, 2003 · Replies 16 · Apr 13, 2003

Replies: 16

Views: 6K

Black hole event horizon as surface of spacetime symmetry

Apr 12, 2003 · Replies 2 · Apr 12, 2003

Replies: 2

Views: 5K

Is There a Giant Black Hole at the Centre of the Universe?

Apr 4, 2003 · Replies 58 · Apr 12, 2003

2

Replies: 58

Views: 13K

Rivers & whirlpools of spacetime

Apr 10, 2003 · Replies 4 · Apr 12, 2003

Replies: 4

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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