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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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High School Universe Age: 13 Billion Years, Revealed by Light Travel

Feb 19, 2004 · Replies 26 · Mar 2, 2004

Replies: 26

Views: 6K

Graduate Effects of acceleration on black holes.

Feb 14, 2004 · Replies 2 · Mar 1, 2004

Replies: 2

Views: 3K

Graduate How Does the Gap Theory Unify Spacetime and Quantum Mechanics?

Jun 1, 2003 · Replies 27 · Mar 1, 2004

Replies: 27

Views: 7K

Undergrad Does gravity play a role in the expansion of the universe?

Feb 19, 2004 · Replies 9 · Mar 1, 2004

Replies: 9

Views: 3K

High School Spacefuel: Utilizing Iron-Dust as a Cheap and Efficient Fuel Source

Feb 5, 2004 · Replies 3 · Feb 29, 2004

Replies: 3

Views: 2K

Graduate Physics in distant galaxies - same as on Earth? (history question)

Feb 24, 2004 · Replies 10 · Feb 28, 2004

Replies: 10

Views: 4K

Graduate Dark Age: Galaxy & Quasar Formation ?

Feb 27, 2004 · Replies 2 · Feb 27, 2004

Replies: 2

Views: 4K

Poll

Vote for Hybrid Inflation: Inflation Poll

Feb 26, 2004 · Replies 3 · Feb 27, 2004

Replies: 3

Views: 3K

High School Sunspots: Viewing at Home - Simplest Method

Feb 25, 2004 · Replies 6 · Feb 26, 2004

Replies: 6

Views: 3K

Discernment , duality and perception ,singularity (not black hole)

Feb 22, 2004 · Replies 4 · Feb 26, 2004

Replies: 4

Views: 4K

Graduate Ekpyrotic model and CMB observations?

Feb 25, 2004 · Replies 3 · Feb 25, 2004

Replies: 3

Views: 3K

Graduate Existence of dark matter questioned

Feb 14, 2004 · Replies 27 · Feb 25, 2004

Replies: 27

Views: 6K

Graduate Comparing different kinds of dark energy

Feb 24, 2004 · Replies 1 · Feb 25, 2004

Replies: 1

Views: 3K

High School Why Do Stars Twinkle? Supernovas & Photons

Feb 24, 2004 · Replies 8 · Feb 24, 2004

Replies: 8

Views: 5K

Undergrad Questions about Universal Gravitation

Feb 10, 2004 · Replies 5 · Feb 24, 2004

Replies: 5

Views: 2K

Amateur astronomer finds new nebula

Feb 13, 2004 · Replies 3 · Feb 23, 2004

Replies: 3

Views: 4K

High School Exploring the Mass & Shape of the Sun

Feb 20, 2004 · Replies 14 · Feb 22, 2004

Replies: 14

Views: 3K

Space Tourism Survey: Answers Wanted!

Jan 15, 2004 · Replies 20 · Feb 21, 2004

Replies: 20

Views: 4K

Graduate Crystal Core Discovered in Dying Star

Feb 18, 2004 · Replies 7 · Feb 21, 2004

Replies: 7

Views: 4K

Graduate Member of Michio Kakus's organisation

Feb 21, 2004 · Replies 1 · Feb 21, 2004

Replies: 1

Views: 3K

Undergrad Falling Back to Orbit: Can Rockets Change Their Orbit?

Feb 20, 2004 · Replies 1 · Feb 20, 2004

Replies: 1

Views: 2K

High School What is the largest object discovered in the Solar System since Pluto?

Feb 20, 2004 · Replies 1 · Feb 20, 2004

Replies: 1

Views: 2K

Undergrad Gravity acting as a repulsive forces at long distances

Jan 24, 2004 · Replies 4 · Feb 20, 2004

Replies: 4

Views: 5K

Graduate Could Einstein have been right originally?

Feb 13, 2004 · Replies 5 · Feb 19, 2004

Replies: 5

Views: 3K

Graduate Explaining Planetary Spin: Insights and Mathematical Considerations

Feb 19, 2004 · Replies 4 · Feb 19, 2004

Replies: 4

Views: 4K

Graduate Is There a Tuning Relationship Between Lunar and Solar Periods?

Feb 12, 2004 · Replies 18 · Feb 19, 2004

Replies: 18

Views: 7K

Graduate Another idea for observing dark energy

Feb 17, 2004 · Replies 1 · Feb 17, 2004

Replies: 1

Views: 2K

Undergrad Could Life Exist in the Hidden Oceans of Jupiter's Moons?

Feb 15, 2004 · Replies 2 · Feb 16, 2004

Replies: 2

Views: 2K

Graduate How Are Black Holes Linked to Time Travel?

Feb 11, 2004 · Replies 3 · Feb 16, 2004

Replies: 3

Views: 4K

Graduate Tamara Davis thesis Expansion and Cosmic Horizons

Feb 14, 2004 · Replies 3 · Feb 16, 2004

Replies: 3

Views: 5K

Graduate Schw. black hole ringing frequencies

Feb 5, 2004 · Replies 9 · Feb 13, 2004

Replies: 9

Views: 3K

Black Hole People: Fact or Fiction?

Feb 8, 2004 · Replies 13 · Feb 13, 2004

Replies: 13

Views: 2K

Stargazing Hubble Space Telescope - O'Keefe forced to reconsider?

Jan 23, 2004 · Replies 4 · Feb 13, 2004

Replies: 4

Views: 3K

Undergrad Growth of Plants in Zero Gravity

Feb 11, 2004 · Replies 3 · Feb 13, 2004

Replies: 3

Views: 10K

Graduate Shouldn't large bodies be hollow?

Feb 10, 2004 · Replies 9 · Feb 11, 2004

Replies: 9

Views: 3K

Graduate Spacetime definition in philosophy?

Feb 9, 2004 · Replies 9 · Feb 11, 2004

Replies: 9

Views: 2K

Graduate Lubos Motl's question about absolute spacetime

Nov 29, 2003 · Replies 27 · Feb 10, 2004

Replies: 27

Views: 11K

Undergrad Astronomers unravel a mystery of the Dark Ages

Feb 5, 2004 · Replies 5 · Feb 10, 2004

Replies: 5

Views: 3K

Opportunity is on the surface of Mars.

Jan 25, 2004 · Replies 14 · Feb 10, 2004

Replies: 14

Views: 3K

Lunar Land Grab: Celestial Real Estate Sales Soar

Feb 4, 2004 · Replies 5 · Feb 10, 2004

Replies: 5

Views: 3K

Undergrad Are There Resources to Help Understand Black Holes for an Amateur Astronomer?

Feb 5, 2004 · Replies 2 · Feb 10, 2004

Replies: 2

Views: 3K

Undergrad Can Beagle 2 Lander uncover evidence of life on Mars?

Nov 27, 2003 · Replies 22 · Feb 9, 2004

Replies: 22

Views: 7K

Could Someone be Watching Us? By Seth Shostak

Jan 23, 2004 · Replies 14 · Feb 9, 2004

Replies: 14

Views: 3K

Mars Gravity Biosatellite programme

Feb 8, 2004 · Replies 2 · Feb 8, 2004

Replies: 2

Views: 3K

Graduate Can We Make a Black Hole on Earth?

Feb 7, 2004 · Replies 12 · Feb 8, 2004

Replies: 12

Views: 3K

Graduate Recoil may eject black holes from a galaxy

Feb 4, 2004 · Replies 15 · Feb 8, 2004

Replies: 15

Views: 4K

High School What Is the Size of a Black Hole?

Feb 8, 2004 · Replies 1 · Feb 8, 2004

Replies: 1

Views: 2K

Undergrad Can we really see 3D in the universe.

Feb 4, 2004 · Replies 13 · Feb 7, 2004

Replies: 13

Views: 3K

Undergrad Opportunity Microscopic Camera Image

Feb 5, 2004 · Replies 3 · Feb 7, 2004

Replies: 3

Views: 3K

Graduate What the spectrum of radiation of stellar objects depends of?

Jan 31, 2004 · Replies 1 · Feb 7, 2004

Replies: 1

Views: 3K

High School Saturn’s Titan Eyed For Increased Exploration

Feb 5, 2004 · Replies 1 · Feb 5, 2004

Replies: 1

Views: 3K

Undergrad How can I determine the date and time using a Planisphere watch?

Feb 3, 2004 · Replies 5 · Feb 4, 2004

Replies: 5

Views: 6K

Graduate Making reflector mirrors from spinning bubbles.

Feb 3, 2004 · Replies 1 · Feb 3, 2004

Replies: 1

Views: 3K

Undergrad Gravity Questions: Measuring and Speed

Feb 3, 2004 · Replies 3 · Feb 3, 2004

Replies: 3

Views: 3K

High School Who created the Crunch Theory and the Continual Expansion Theory ?

Feb 1, 2004 · Replies 3 · Feb 3, 2004

Replies: 3

Views: 6K

Undergrad Interstellar Travel: Reaching Alpha Centauri

Feb 1, 2004 · Replies 5 · Feb 3, 2004

Replies: 5

Views: 4K

Undergrad Double Star characteristic frequencies of light

Feb 2, 2004 · Replies 2 · Feb 3, 2004

Replies: 2

Views: 3K

US Universities for Postgraduate Studies in Astrophysics

Dec 23, 2003 · Replies 19 · Feb 3, 2004

Replies: 19

Views: 4K

Graduate Will a blackhole shrink spacetime?

Jan 28, 2004 · Replies 13 · Feb 2, 2004

Replies: 13

Views: 3K

Poll

Is Manned Space Travel More Beneficial Than Robot-Controlled Missions?

Jan 25, 2004 · Replies 5 · Feb 2, 2004

Replies: 5

Views: 2K

Undergrad Age of Universe: Dist. to Big Bang vs New Star

Nov 17, 2003 · Replies 5 · Feb 2, 2004

Replies: 5

Views: 4K

Looking for a Lunar altitude map

Jan 29, 2004 · Replies 4 · Feb 2, 2004

Replies: 4

Views: 4K

Graduate Alan Guth and Stephen Hawking on Eternal Inflation

Feb 2, 2004 · Replies 1 · Feb 2, 2004

Replies: 1

Views: 9K

Graduate Gravity fiels and spacetime fabric

Jan 7, 2004 · Replies 1 · Feb 2, 2004

Replies: 1

Views: 4K

Graduate Universe Is Infinite: Mathematical Proofs

Jan 15, 2004 · Replies 37 · Feb 2, 2004

2

Replies: 37

Views: 7K

Learn Astronomy for Free: Tips & Ideas

Jan 28, 2004 · Replies 11 · Jan 31, 2004

Replies: 11

Views: 3K

Graduate Can Newton's Gravitational Law and Hooke's Law be Unified?

Jan 15, 2004 · Replies 7 · Jan 31, 2004

Replies: 7

Views: 3K

What Happened to Spirit Rover on Mars?

Jan 22, 2004 · Replies 32 · Jan 31, 2004

2

Replies: 32

Views: 6K

Graduate Drake Equation: Solving the Probability of Extraterrestrial Civilizations

Jan 29, 2004 · Replies 1 · Jan 30, 2004

Replies: 1

Views: 4K

Undergrad Definition of Life: Beyond Organic Matter

Jan 30, 2004 · Replies 1 · Jan 30, 2004

Replies: 1

Views: 3K

Graduate What Are the Mysteries Surrounding Super Clusters in Our Universe?

Jan 25, 2004 · Replies 3 · Jan 29, 2004

Replies: 3

Views: 4K

Graduate Jovian System has better colony sites than moon&mars

Jan 21, 2004 · Replies 60 · Jan 28, 2004

3

Replies: 60

Views: 11K

High School What is a planet's order called?

Jan 20, 2004 · Replies 1 · Jan 28, 2004

Replies: 1

Views: 3K

Graduate Why do you refuse to consider new evidence and advancements in science?

Jan 27, 2004 · Replies 2 · Jan 27, 2004

Replies: 2

Views: 3K

Undergrad How big is a BLACK HOLE? Can it be calculated ?

Jan 25, 2004 · Replies 5 · Jan 26, 2004

Replies: 5

Views: 7K

Graduate For those about to go Surfing tomorrow?Big-Bang new perspective?

Jan 19, 2004 · Replies 3 · Jan 25, 2004

Replies: 3

Views: 3K

Is there water on Mars? Check out these amazing pics!

Jan 24, 2004 · Replies 4 · Jan 25, 2004

Replies: 4

Views: 3K

Graduate Superluminal spacecraft: impossible?

Jan 23, 2004 · Replies 25 · Jan 25, 2004

Replies: 25

Views: 4K

A great day for space exploration

Jan 4, 2004 · Replies 24 · Jan 24, 2004

Replies: 24

Views: 5K

Graduate Does the Sun's Gravitational Effect Influence the Calculation of Star Distances?

Jan 24, 2004 · Replies 5 · Jan 24, 2004

Replies: 5

Views: 3K

Galileo mission fact sheets (in case yr interested)

Jan 24, 2004 · Replies 3 · Jan 24, 2004

Replies: 3

Views: 4K

High School Is Bush's Moon-Mars Initiative a New Space Frontier?

Jan 15, 2004 · Replies 34 · Jan 23, 2004

2

Replies: 34

Views: 6K

Undergrad What is the Purpose of the Cosmic Ray Observatory?

Jan 13, 2004 · Replies 4 · Jan 23, 2004

Replies: 4

Views: 3K

Graduate Has the Origin Point of the Big Bang Been Approximated?

Jan 22, 2004 · Replies 23 · Jan 23, 2004

Replies: 23

Views: 4K

Graduate What Are the Best Strategies for Intergalactic Communication?

Jan 20, 2004 · Replies 14 · Jan 23, 2004

Replies: 14

Views: 3K

Graduate Uncovering the Truth About Dark Energy: XMM-Newton's Surprising Findings

Jan 22, 2004 · Replies 2 · Jan 23, 2004

Replies: 2

Views: 2K

Undergrad Expanding people in an expanding universe?

Jan 17, 2004 · Replies 7 · Jan 22, 2004

Replies: 7

Views: 8K

Daft question but it's getting late.

Jan 21, 2004 · Replies 4 · Jan 22, 2004

Replies: 4

Views: 3K

High School Planet or Star: How to Tell the Difference When Stargazing?

Jan 20, 2004 · Replies 11 · Jan 22, 2004

Replies: 11

Views: 8K

Undergrad Mass of a Planet: Find it Quickly!

Jan 21, 2004 · Replies 22 · Jan 21, 2004

Replies: 22

Views: 10K

High School Greetings Physics Wizzes: Find New Moon Apex Time Tonight

Jan 21, 2004 · Replies 6 · Jan 21, 2004

Replies: 6

Views: 3K

Graduate How Does the Solar Muon Flux Explain the High Temperature of the Corona?

Jan 10, 2004 · Replies 6 · Jan 21, 2004

Replies: 6

Views: 3K

How can we afford space tourism without discounts and referrals?

Jan 15, 2004 · Replies 6 · Jan 20, 2004

Replies: 6

Views: 3K

Graduate How much of the Milky Way is within the Galactic Habitable Zone?

Jan 16, 2004 · Replies 2 · Jan 20, 2004

Replies: 2

Views: 4K

Undergrad What does the sun look like from Mars?

Jan 19, 2004 · Replies 9 · Jan 20, 2004

Replies: 9

Views: 7K

Graduate Galaxy string challenges Models? (News link)

Jan 19, 2004 · Replies 2 · Jan 20, 2004

Replies: 2

Views: 2K

First victim of moon base/Mars mission?

Jan 16, 2004 · Replies 24 · Jan 19, 2004

Replies: 24

Views: 5K

Undergrad LUNAR LASER RANGING Experiment Uncovers Moon's Geology

Jan 19, 2004 · Replies 1 · Jan 19, 2004

Replies: 1

Views: 2K

High School How Does Hubble Take Pictures of the Universe?

Jan 18, 2004 · Replies 5 · Jan 19, 2004

Replies: 5

Views: 2K

Graduate The bathe in a good health space time

Dec 15, 2003 · Replies 2 · Jan 18, 2004

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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