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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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Is Alpha Centauri, the closes star to the solar system?

May 4, 2006 · Replies 13 · May 6, 2006

Replies: 13

Views: 4K

Earth's Rotation: Day & Year Cycles

May 5, 2006 · Replies 6 · May 6, 2006

Replies: 6

Views: 6K

Are Trojans possible for other planets besides Jupiter?

Apr 27, 2006 · Replies 9 · May 5, 2006

Replies: 9

Views: 5K

Finding Water on the Moon: A Proposal for an Experiment

May 2, 2006 · Replies 2 · May 4, 2006

Replies: 2

Views: 4K

Stargazing What Can You Capture in the Night Sky with Jupiter, Saturn, and Comet Photos?

Apr 30, 2006 · Replies 2 · May 3, 2006

Replies: 2

Views: 2K

Why is my paper very difficult to be published?

May 3, 2006 · Replies 13 · May 3, 2006

Replies: 13

Views: 3K

Poll

Is a Manned Mission to Mars Beneficial for Scientific Advancement?

May 1, 2006 · Replies 9 · May 3, 2006

Replies: 9

Views: 2K

Can We Understand Axis Tilts in Planetary Systems?

Apr 29, 2006 · Replies 6 · May 3, 2006

Replies: 6

Views: 3K

Mars Mission: Challenges of Sending Humans to Mars

Apr 29, 2006 · Replies 12 · May 2, 2006

Replies: 12

Views: 4K

Radio Waves emitted by Black Holes

May 2, 2006 · Replies 2 · May 2, 2006

Replies: 2

Views: 8K

Regular Flights to and from Moon: Would You See It?

Apr 7, 2006 · Replies 7 · May 2, 2006

Replies: 7

Views: 3K

Do solar neutrinos really change flavor?

Apr 29, 2006 · Replies 14 · May 1, 2006

Replies: 14

Views: 4K

Acceleration due to the solar wind

May 1, 2006 · Replies 1 · May 1, 2006

Replies: 1

Views: 3K

The Same Plane: Orbits & Galaxies in Our Solar System

Apr 30, 2006 · Replies 1 · May 1, 2006

Replies: 1

Views: 2K

Stargazing Getting Started with Astrophotography: A Beginner's Guide

Apr 12, 2006 · Replies 6 · Apr 30, 2006

Replies: 6

Views: 2K

Is a Methane-Molecule-Like Solar System Stable?

Apr 25, 2006 · Replies 5 · Apr 30, 2006

Replies: 5

Views: 3K

Strike deathray from list of concerns?

Apr 26, 2006 · Replies 4 · Apr 29, 2006

Replies: 4

Views: 2K

Why does a star's gravitational force increase when it becomes a black hole?

Apr 25, 2006 · Replies 10 · Apr 28, 2006

Replies: 10

Views: 3K

Relation Between Areas of Astronomy

Apr 27, 2006 · Replies 18 · Apr 28, 2006

Replies: 18

Views: 6K

Orbital Simulation: Estimating Mass from Orbit & Visual Observations

Apr 26, 2006 · Replies 11 · Apr 27, 2006

Replies: 11

Views: 3K

Drake equeation and planet finding

Apr 13, 2006 · Replies 23 · Apr 27, 2006

Replies: 23

Views: 4K

Can the gas model theory explain recent satellite observations?

Apr 25, 2006 · Replies 10 · Apr 26, 2006

Replies: 10

Views: 3K

Someone want to have fun with asteroid simulation?

Mar 31, 2006 · Replies 5 · Apr 26, 2006

Replies: 5

Views: 4K

Driving past your opponent in a space race

Apr 21, 2006 · Replies 9 · Apr 26, 2006

Replies: 9

Views: 3K

Time after big bang we can observe, uncertainty principle

Apr 20, 2006 · Replies 6 · Apr 26, 2006

Replies: 6

Views: 5K

Inverted Physics: Vacuum is Solid, Matter are Holes

Apr 25, 2006 · Replies 7 · Apr 26, 2006

Replies: 7

Views: 2K

Discover the Fascinating Phenomenon of Northern Lights

Apr 19, 2006 · Replies 21 · Apr 25, 2006

Replies: 21

Views: 5K

Is Our Sun Part of a Binary Star System?

Apr 25, 2006 · Replies 2 · Apr 25, 2006

Replies: 2

Views: 3K

Why does the universe look black?

Sep 13, 2005 · Replies 11 · Apr 25, 2006

Replies: 11

Views: 5K

Proving Pluto's Orbit Inside Neptune's - Maths Investigation

Apr 23, 2006 · Replies 1 · Apr 23, 2006

Replies: 1

Views: 3K

Could a Wormhole and Black Holes be Used to Reverse the Big Bang?

Mar 30, 2006 · Replies 5 · Apr 23, 2006

Replies: 5

Views: 3K

Occam's Razor and WMAP Anomalies

Apr 20, 2006 · Replies 6 · Apr 21, 2006

Replies: 6

Views: 3K

Calculating apparent positions of sun and moon

Apr 1, 2006 · Replies 6 · Apr 18, 2006

Replies: 6

Views: 5K

What planets were ancient people able to see in the sky without telescopes?

Apr 12, 2006 · Replies 7 · Apr 18, 2006

Replies: 7

Views: 3K

What distinguishes Pre-main-sequence stars from main sequence stars?

Apr 13, 2006 · Replies 5 · Apr 16, 2006

Replies: 5

Views: 3K

Sun's Position in Our Solar System

Apr 15, 2006 · Replies 9 · Apr 15, 2006

Replies: 9

Views: 12K

Do Celestial Objects Compete for Matter?

Feb 14, 2006 · Replies 4 · Apr 15, 2006

Replies: 4

Views: 3K

Distance between earth and moon increasing

Apr 12, 2006 · Replies 4 · Apr 15, 2006

Replies: 4

Views: 15K

UK Moon Sighting: Was the Halo Real or Atmospheric?

Apr 14, 2006 · Replies 5 · Apr 14, 2006

Replies: 5

Views: 3K

Stargazing Do astronomers at the 3,000 dollar level become degenerates

Apr 12, 2006 · Replies 1 · Apr 13, 2006

Replies: 1

Views: 1K

What Is the Center in Sloan Digital Sky Survey?

Apr 8, 2006 · Replies 5 · Apr 13, 2006

Replies: 5

Views: 3K

Temp of a Comm Satellite in Orbit Around Earth

Apr 12, 2006 · Replies 2 · Apr 12, 2006

Replies: 2

Views: 2K

Why do stars exhibit red shift and blue shift in our universe?

Apr 5, 2006 · Replies 9 · Apr 11, 2006

Replies: 9

Views: 2K

Sun's Companion Star: Nemesis Theory

Apr 7, 2006 · Replies 3 · Apr 10, 2006

Replies: 3

Views: 7K

What Are Rosswog's Ideas on the GRB Mechanism?

Apr 2, 2006 · Replies 9 · Apr 7, 2006

Replies: 9

Views: 3K

How to Calculate a Parsec - Tips from Astronomers

Apr 5, 2006 · Replies 2 · Apr 6, 2006

Replies: 2

Views: 2K

Why Does a(tau) Not Equal af in This Orbital Migration Equation?

Apr 4, 2006 · Replies 1 · Apr 5, 2006

Replies: 1

Views: 2K

The Great Attractor - What Do We Know?

Mar 21, 2006 · Replies 16 · Apr 4, 2006

Replies: 16

Views: 5K

"Mysterious "Chaos Cloud" Headed Toward Earth"

Apr 1, 2006 · Replies 3 · Apr 3, 2006

Replies: 3

Views: 11K

Evolving Earth: Solar System Environment Over Time

Apr 2, 2006 · Replies 1 · Apr 3, 2006

Replies: 1

Views: 3K

How many places in the solar system have liquid water?

Mar 16, 2006 · Replies 7 · Apr 3, 2006

Replies: 7

Views: 4K

Are White Holes Real or Just a Theoretical Concept?

Feb 2, 2006 · Replies 5 · Apr 3, 2006

Replies: 5

Views: 3K

Neutron star: heaviest teaspoon of matter

Mar 23, 2006 · Replies 5 · Mar 30, 2006

Replies: 5

Views: 29K

Understanding Strong & Weak Resonance

Mar 24, 2006 · Replies 4 · Mar 30, 2006

Replies: 4

Views: 4K

Does Gravity Violate the Cosmo Speed Limit?

Mar 30, 2006 · Replies 20 · Mar 30, 2006

Replies: 20

Views: 4K

Will the universe end in a Big Crunch or a Big Rip?

Mar 30, 2006 · Replies 1 · Mar 30, 2006

Replies: 1

Views: 6K

How Does Black Hole Entropy Increase When Starting with a Pure State?

Mar 11, 2006 · Replies 6 · Mar 30, 2006

Replies: 6

Views: 3K

Interest in blackholes and whiteholes

Mar 29, 2006 · Replies 4 · Mar 30, 2006

Replies: 4

Views: 2K

Stargazing Finding Equations for Sun's Eclipse Periodicity

Mar 29, 2006 · Replies 1 · Mar 29, 2006

Replies: 1

Views: 3K

Question about relation between galaxies

Mar 26, 2006 · Replies 3 · Mar 28, 2006

Replies: 3

Views: 3K

How close is 18 Scorpii, the other solar twin?

Mar 28, 2006 · Replies 1 · Mar 28, 2006

Replies: 1

Views: 2K

Astronomy Problems: Help Solve Now!

Mar 28, 2006 · Replies 1 · Mar 28, 2006

Replies: 1

Views: 3K

Fell into the black hole that is myspace

Mar 26, 2006 · Replies 19 · Mar 27, 2006

Replies: 19

Views: 3K

Speed of Objects in Space - Is It the Same as On Earth?

Mar 24, 2006 · Replies 10 · Mar 26, 2006

Replies: 10

Views: 9K

Likelyhood of Extraterrestrial Intelligence

Mar 18, 2003 · Replies 61 · Mar 26, 2006

3

Replies: 61

Views: 22K

Help finding an Aitoff projection of constellations

Mar 25, 2006 · Replies 1 · Mar 25, 2006

Replies: 1

Views: 3K

The Earth, Moon and Sun's gavity game.

Mar 23, 2006 · Replies 5 · Mar 24, 2006

Replies: 5

Views: 8K

The physics of dark matter & energy

Mar 23, 2006 · Replies 3 · Mar 23, 2006

Replies: 3

Views: 2K

Is the Universe Larger and Denser Than We Imagine?

Mar 20, 2006 · Replies 34 · Mar 23, 2006

2

Replies: 34

Views: 5K

Can a Moon Have Its Own Moon? Exploring Orbital Possibilities

Mar 22, 2006 · Replies 4 · Mar 23, 2006

Replies: 4

Views: 3K

Galactic Plane Crossings and Mass Extinctions: Is There a Connection?

Mar 21, 2006 · Replies 6 · Mar 22, 2006

Replies: 6

Views: 2K

Poll

Is Seeing a Black Hole Possible?

Mar 17, 2006 · Replies 13 · Mar 22, 2006

Replies: 13

Views: 13K

The moon doesn`t rotate around it`s axis.

Mar 17, 2006 · Replies 15 · Mar 22, 2006

Replies: 15

Views: 6K

Are Images of Space Distorted by Gravity?

Mar 16, 2006 · Replies 5 · Mar 22, 2006

Replies: 5

Views: 3K

Redshift > 1.46 means Recessional Velocity over C?

Mar 19, 2006 · Replies 8 · Mar 21, 2006

Replies: 8

Views: 7K

Is the Vacuum Between Water Molecules the Same as Cosmic Space?

Mar 21, 2006 · Replies 1 · Mar 21, 2006

Replies: 1

Views: 4K

Planetary retention of atmospheres

Mar 18, 2006 · Replies 3 · Mar 21, 2006

Replies: 3

Views: 5K

What is the highest redshift object ever observed in the universe?

Mar 19, 2006 · Replies 10 · Mar 21, 2006

Replies: 10

Views: 7K

First stars now thought to be 400 MLY after BB?

Mar 19, 2006 · Replies 6 · Mar 21, 2006

Replies: 6

Views: 2K

Vernal Equinox: Understanding the Yearly Variation

Mar 20, 2006 · Replies 4 · Mar 20, 2006

Replies: 4

Views: 4K

Do Other Planets Have Radiation Belts Like Earth?

Mar 20, 2006 · Replies 2 · Mar 20, 2006

Replies: 2

Views: 4K

Is the Quasar in NGC 7319 Really Inside the Galaxy?

Mar 16, 2006 · Replies 17 · Mar 20, 2006

Replies: 17

Views: 10K

Characteristics of globular clusters

Mar 17, 2006 · Replies 5 · Mar 18, 2006

Replies: 5

Views: 4K

Shoreline on Saturn's Moon Titan - Yahoo News

Sep 18, 2005 · Replies 6 · Mar 18, 2006

Replies: 6

Views: 3K

Compute Tidal Locking Radius: Planet/Moon Area

Mar 17, 2006 · Replies 2 · Mar 17, 2006

Replies: 2

Views: 8K

Universal Regeneration: Is Expansion Recycled?

Mar 14, 2006 · Replies 5 · Mar 17, 2006

Replies: 5

Views: 3K

Progress for Humanity: Examining the Cost of Experiments

Mar 2, 2006 · Replies 12 · Mar 17, 2006

Replies: 12

Views: 4K

New WMAP Data: Check Out Figures 20 & 21 on Pages 48 & 49

Mar 16, 2006 · Replies 1 · Mar 17, 2006

Replies: 1

Views: 5K

Life on Europa? Complex or Simple?

Mar 13, 2006 · Replies 2 · Mar 16, 2006

Replies: 2

Views: 3K

Nuclear reactions in AGN accretion disk

Mar 13, 2006 · Replies 2 · Mar 16, 2006

Replies: 2

Views: 4K

Farthest Visible Star: Distance & Observation

Mar 12, 2006 · Replies 18 · Mar 16, 2006

Replies: 18

Views: 23K

Is Anything Ever Truly Stationary? A Theoretical Exploration

Mar 11, 2006 · Replies 8 · Mar 14, 2006

Replies: 8

Views: 3K

Do All Spiral Galaxies Rotate in the Same Direction from Earth's Perspective?

Mar 9, 2006 · Replies 6 · Mar 14, 2006

Replies: 6

Views: 6K

What is the Anomaly with Sirius B's Data in Astrophysics Calculations?

Mar 6, 2006 · Replies 7 · Mar 14, 2006

Replies: 7

Views: 5K

What is the difference between a nova and a super nova?

Mar 13, 2006 · Replies 1 · Mar 14, 2006

Replies: 1

Views: 4K

How Can I Determine Current Planetary Velocities?

Mar 13, 2006 · Replies 4 · Mar 13, 2006

Replies: 4

Views: 10K

The most intnse solar strom in 50 years

Mar 13, 2006 · Replies 5 · Mar 13, 2006

Replies: 5

Views: 3K

Galactic Frequencies: Info on Frequency of Galaxies

Mar 12, 2006 · Replies 7 · Mar 13, 2006

Replies: 7

Views: 2K

Tully-Fisher, fundamental plane - what about LSBs, dwarfs, etc?

Mar 6, 2006 · Replies 11 · Mar 12, 2006

Replies: 11

Views: 3K

Question for astronomers, astrphys.

Mar 12, 2006 · Replies 2 · Mar 12, 2006

Replies: 2

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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