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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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Spirit Landed Successfully, sending pictures

Jan 4, 2004 · Replies 7 · Jan 17, 2004

Replies: 7

Views: 3K

How do you find which direcion you are travelling in space?

Jan 13, 2004 · Replies 9 · Jan 16, 2004

Replies: 9

Views: 3K

When will the first Space Wars happen?

Jan 9, 2004 · Replies 17 · Jan 16, 2004

Replies: 17

Views: 4K

Graduate What is the significance of superheated gas in the cosmos?

Nov 30, 2003 · Replies 22 · Jan 16, 2004

Replies: 22

Views: 6K

Graduate Significance of equal Sun and Moon apparent sizes?

Jan 9, 2004 · Replies 5 · Jan 16, 2004

Replies: 5

Views: 5K

Stargazing Revolutionizing Telescope Technology: The Potential of Analog Nano-Tech Mirrors

Jan 15, 2004 · Replies 1 · Jan 16, 2004

Replies: 1

Views: 3K

Graduate Israeli technology enables images beamed from Mars

Jan 13, 2004 · Replies 5 · Jan 15, 2004

Replies: 5

Views: 3K

Discover the Power of Solar Energy: Science, Facts and Resources

Jan 10, 2004 · Replies 1 · Jan 15, 2004

Replies: 1

Views: 2K

Graduate The surface of Mars, the loss it’s of atmosphere and the fate of earth.

Jan 14, 2004 · Replies 1 · Jan 14, 2004

Replies: 1

Views: 5K

Graduate GEMS - a rich trove of information about galaxy evolution

Jan 13, 2004 · Replies 5 · Jan 13, 2004

Replies: 5

Views: 3K

Graduate How do scientists create a map of the sky using cosmic background radiation?

Jan 12, 2004 · Replies 3 · Jan 13, 2004

Replies: 3

Views: 3K

Undergrad Is it possible for an object to orbit a stationary object?

Jan 10, 2004 · Replies 11 · Jan 12, 2004

Replies: 11

Views: 4K

Graduate Lensed quasar observations support dark matter models

Dec 18, 2003 · Replies 11 · Jan 12, 2004

Replies: 11

Views: 5K

Undergrad Space Station: Cost vs Value - Science Channel Review

Dec 24, 2003 · Replies 12 · Jan 10, 2004

Replies: 12

Views: 3K

Graduate Are there regions inside the Universe where the Laws of Physics vary?

Jan 10, 2004 · Replies 1 · Jan 10, 2004

Replies: 1

Views: 3K

Graduate The production of a black hole using television sets

Jan 9, 2004 · Replies 6 · Jan 10, 2004

Replies: 6

Views: 3K

Colliding Galaxies; Hot Gas; New News

Jan 10, 2004 · Replies 1 · Jan 10, 2004

Replies: 1

Views: 2K

Undergrad What is an Active Galactic Nucleus and Why is it Important?

Jan 9, 2004 · Replies 1 · Jan 9, 2004

Replies: 1

Views: 4K

Graduate Will Gravitational Wave Detectors Challenge Current Theories on Binary Stars?

Jan 9, 2004 · Replies 1 · Jan 9, 2004

Replies: 1

Views: 3K

High School Orbit Deformation: Mars & Jupiter

Jan 8, 2004 · Replies 6 · Jan 9, 2004

Replies: 6

Views: 3K

Graduate Can black holes be used for time travel?

Jan 4, 2004 · Replies 13 · Jan 9, 2004

Replies: 13

Views: 6K

Undergrad Is the Universe Really Expanding, and Where is it Heading?

Jan 8, 2004 · Replies 2 · Jan 8, 2004

Replies: 2

Views: 3K

Graduate Black Holes & Time: What Am I Misunderstanding?

Dec 23, 2003 · Replies 8 · Jan 8, 2004

Replies: 8

Views: 6K

Newbie Asks "What Contains the Universe?

Dec 19, 2003 · Replies 17 · Jan 8, 2004

Replies: 17

Views: 4K

High School Two questions about space (new guy)

Jan 7, 2004 · Replies 3 · Jan 7, 2004

Replies: 3

Views: 2K

High School How Do Astronomers Determine the Distance of Stars?

Jan 2, 2004 · Replies 15 · Jan 6, 2004

Replies: 15

Views: 7K

Graduate How Do Cosmologists Account for the Age of Quasars?

Jan 3, 2004 · Replies 4 · Jan 6, 2004

Replies: 4

Views: 8K

Is the Celestron C-6N Reflector a Good Choice?

Jan 2, 2004 · Replies 2 · Jan 6, 2004

Replies: 2

Views: 3K

High School What Discoveries Could NASA's Mars Rover Spirit Make in Gusev Crater?

Jan 6, 2004 · Replies 1 · Jan 6, 2004

Replies: 1

Views: 3K

Graduate Leap Second Mystery: Is Earth's Orbit Slowing?

Jan 3, 2004 · Replies 1 · Jan 4, 2004

Replies: 1

Views: 3K

Graduate How can a black hole attract nothing at all?

Dec 26, 2003 · Replies 13 · Jan 4, 2004

Replies: 13

Views: 3K

Graduate Discovering the Mysterious Energy in the Universe

Jan 2, 2004 · Replies 5 · Jan 3, 2004

Replies: 5

Views: 3K

Undergrad Motion of J002E3: Captured Object's Orbit Around Earth

Jan 1, 2004 · Replies 5 · Jan 2, 2004

Replies: 5

Views: 3K

Graduate Gravity of Black Hole: Explaining its Effects Outside

Jan 2, 2004 · Replies 2 · Jan 2, 2004

Replies: 2

Views: 4K

Graduate What Happens When Space-Time Reaches the Speed of Light?

Jan 1, 2004 · Replies 2 · Jan 1, 2004

Replies: 2

Views: 2K

Undergrad How Did Beagle 2 Navigate Its Final Approach to Mars?

Dec 24, 2003 · Replies 9 · Dec 31, 2003

Replies: 9

Views: 3K

Graduate What is the maximum iron core mass of a star before collapse?

May 23, 2003 · Replies 19 · Dec 29, 2003

Replies: 19

Views: 11K

Graduate Does Empty Space Truly Extend Infinitely Beyond Our Universe?

Dec 24, 2003 · Replies 17 · Dec 29, 2003

Replies: 17

Views: 4K

Undergrad Mass of Black Hole at Size of Tennis ball: Facts & Variations

Dec 29, 2003 · Replies 1 · Dec 29, 2003

Replies: 1

Views: 3K

High School Can We Visualize Exoplanetary Systems and Understand Binary Decay Rates?

Nov 22, 2003 · Replies 20 · Dec 29, 2003

Replies: 20

Views: 6K

Communication with Extraterrestrial Life

Oct 4, 2003 · Replies 52 · Dec 28, 2003

2

Replies: 52

Views: 12K

Undergrad Could the Star of Bethlehem Have Been a Supernova?

Dec 23, 2003 · Replies 2 · Dec 28, 2003

Replies: 2

Views: 3K

Graduate Neutrino Flux of the Solar Stellar Core: A Fascinating Image

Dec 27, 2003 · Replies 1 · Dec 28, 2003

Replies: 1

Views: 3K

High School How Does Moon Dust Exist Without Weathering?

Dec 25, 2003 · Replies 7 · Dec 26, 2003

Replies: 7

Views: 4K

Graduate What Really Happened Before the Big Bang?

Dec 22, 2003 · Replies 5 · Dec 24, 2003

Replies: 5

Views: 3K

High School Something odd, I need an explanation desperately

Dec 21, 2003 · Replies 5 · Dec 23, 2003

Replies: 5

Views: 3K

MENSA Usenet Group Discuss Space Aliens

Dec 22, 2003 · Replies 3 · Dec 23, 2003

Replies: 3

Views: 3K

When exactly does the year start getting shorter again?

Dec 21, 2003 · Replies 1 · Dec 21, 2003

Replies: 1

Views: 2K

Graduate Spatial folding/compression/expansion be accomplished artificially

Dec 20, 2003 · Replies 1 · Dec 21, 2003

Replies: 1

Views: 2K

Graduate Understanding the Effects of Earth's Precession on Planet Cores | Crystalinks"

Nov 10, 2003 · Replies 3 · Dec 20, 2003

Replies: 3

Views: 5K

Graduate Calculating The Age Of The Universe

Dec 18, 2003 · Replies 14 · Dec 19, 2003

Replies: 14

Views: 5K

Undergrad What Happens if We Remove a Planet from the Solar System?

Sep 23, 2003 · Replies 39 · Dec 19, 2003

2

Replies: 39

Views: 11K

Graduate How Does a Singularity Form in a Collapsing Star?

Jun 23, 2003 · Replies 14 · Dec 19, 2003

Replies: 14

Views: 3K

High School Are There Any Isolated Black Holes? Name a Few Here

Dec 3, 2003 · Replies 7 · Dec 17, 2003

Replies: 7

Views: 3K

Graduate Electromagnetic Bubble forming Gamma Ray Bursts.

Dec 16, 2003 · Replies 2 · Dec 16, 2003

Replies: 2

Views: 3K

Graduate Vacuum energy density and Hubble expansion

Dec 11, 2003 · Replies 6 · Dec 16, 2003

Replies: 6

Views: 5K

Graduate Is Dark Matter Evenly Distributed in Galaxies?

Dec 8, 2003 · Replies 12 · Dec 15, 2003

Replies: 12

Views: 3K

Buy Land on the Moon: Lunar Realty Opens in Melbourne

Oct 13, 2003 · Replies 17 · Dec 15, 2003

Replies: 17

Views: 4K

Undergrad Is the Moon Really Moving Away from Earth and What Would Happen If It Did?

Dec 2, 2003 · Replies 15 · Dec 13, 2003

Replies: 15

Views: 8K

Poll

Will Deep Space Exploration ever begin?

Dec 3, 2003 · Replies 11 · Dec 12, 2003

Replies: 11

Views: 4K

Graduate Could New Pulsar Discoveries Lead to Direct Detection of Cosmic Gravity Waves?

Dec 12, 2003 · Replies 3 · Dec 12, 2003

Replies: 3

Views: 3K

Complex space game called Ferion

Dec 11, 2003 · Replies 2 · Dec 12, 2003

Replies: 2

Views: 3K

Graduate Venus possibly habitable for billions of years: Newscientist.com

Sep 9, 2003 · Replies 12 · Dec 11, 2003

Replies: 12

Views: 5K

Graduate What if there was only two dimensions. Space and Time.

Dec 7, 2003 · Replies 6 · Dec 11, 2003

Replies: 6

Views: 5K

Graduate Multi-layered spacetime creates everything.

Nov 2, 2003 · Replies 10 · Dec 10, 2003

Replies: 10

Views: 7K

Stargazing Telescope Q: Does Larger Diameter Mean Objects Appear Brighter?

Dec 8, 2003 · Replies 6 · Dec 10, 2003

Replies: 6

Views: 3K

Who came up with the term 'multiverse'?

Dec 9, 2003 · Replies 3 · Dec 10, 2003

Replies: 3

Views: 3K

Graduate Gravity: Strength in Weakness: CSM

Sep 24, 2003 · Replies 8 · Dec 10, 2003

Replies: 8

Views: 4K

Undergrad Kepler's Third Law: Deriving Radius3/Period2

Nov 15, 2003 · Replies 13 · Dec 10, 2003

Replies: 13

Views: 16K

High School Compare Planetary Properties: Mass, Composition, Density +more

Dec 6, 2003 · Replies 8 · Dec 9, 2003

Replies: 8

Views: 5K

Graduate Fuel of the future is antimatter

Nov 17, 2003 · Replies 16 · Dec 9, 2003

Replies: 16

Views: 5K

Graduate How Do I Calculate Galactic Mass Proportional to Radius?

Dec 8, 2003 · Replies 1 · Dec 8, 2003

Replies: 1

Views: 3K

Graduate The Hawaii Moon Declaration (8 December, 2003)

Dec 8, 2003 · Replies 0 · Dec 8, 2003

Replies: 0

Views: 2K

Undergrad Modeling Planetary Temperature for an Online Game Using Limited Factors

Dec 2, 2003 · Replies 7 · Dec 8, 2003

Replies: 7

Views: 3K

Graduate Big Bang Worries: Can We See It?

Dec 8, 2003 · Replies 24 · Dec 8, 2003

Replies: 24

Views: 5K

Graduate Question about light and blackholes

Nov 13, 2003 · Replies 16 · Dec 8, 2003

Replies: 16

Views: 5K

Undergrad The Collapsar Model: What Do We Know?

Dec 7, 2003 · Replies 2 · Dec 8, 2003

Replies: 2

Views: 4K

Poll

Is There Affordable Technology for Capturing Paranormal Activity?

Dec 3, 2003 · Replies 7 · Dec 7, 2003

Replies: 7

Views: 5K

Undergrad Determining stable orbits for other stars

Dec 7, 2003 · Replies 4 · Dec 7, 2003

Replies: 4

Views: 4K

Another ET thought exp (creation rant?)

Dec 6, 2003 · Replies 3 · Dec 7, 2003

Replies: 3

Views: 2K

Graduate Hawking Radiation 2 (different question)

Nov 29, 2003 · Replies 9 · Dec 7, 2003

Replies: 9

Views: 6K

What Is the Logarithmic Map of the Universe?

Dec 4, 2003 · Replies 3 · Dec 6, 2003

Replies: 3

Views: 5K

Exploding black holes rain down on Earth

Dec 5, 2003 · Replies 4 · Dec 5, 2003

Replies: 4

Views: 3K

Undergrad How do solar wind particles get trapped in a planet's magnetosphere?

Dec 4, 2003 · Replies 4 · Dec 5, 2003

Replies: 4

Views: 5K

Aliens: Will They Fear Us or Take Our Resources?

Oct 31, 2003 · Replies 26 · Dec 5, 2003

Replies: 26

Views: 7K

High School Why are Planetary Orbits Elliptical and not Circular?

Oct 24, 2003 · Replies 17 · Dec 5, 2003

Replies: 17

Views: 9K

Undergrad Kuiper Belt Binary Pairs: Existence Confirmed?

Dec 2, 2003 · Replies 9 · Dec 4, 2003

Replies: 9

Views: 3K

Graduate On the hypothesis of a genuinely quantum spacetime

Nov 30, 2003 · Replies 1 · Dec 3, 2003

Replies: 1

Views: 2K

Undergrad Is astrophysics the right path for me in grad school?

Dec 1, 2003 · Replies 2 · Dec 2, 2003

Replies: 2

Views: 3K

Undergrad How can the satellite have an centrifugal force?

Nov 30, 2003 · Replies 10 · Dec 2, 2003

Replies: 10

Views: 4K

Graduate Is a black hole a superconducter?

Nov 21, 2003 · Replies 9 · Dec 2, 2003

Replies: 9

Views: 3K

Undergrad Is the Universe's Shape Just a Matter of Perception?

Nov 19, 2003 · Replies 13 · Dec 1, 2003

Replies: 13

Views: 5K

Graduate Is there a blackhole in the centre of EVERY galaxy?

Nov 27, 2003 · Replies 5 · Dec 1, 2003

Replies: 5

Views: 28K

Audio needed (I think you can help)

Dec 1, 2003 · Replies 2 · Dec 1, 2003

Replies: 2

Views: 3K

Space flight sim with realistic physics

Nov 29, 2003 · Replies 3 · Nov 30, 2003

Replies: 3

Views: 6K

Stargazing Lunar Eclipse and earth's shadow

Nov 11, 2003 · Replies 5 · Nov 30, 2003

Replies: 5

Views: 4K

Undergrad Does the univeres have size or shape?

Nov 29, 2003 · Replies 2 · Nov 30, 2003

Replies: 2

Views: 5K

Undergrad If a massive body fails to become a star could it still suport planetary system?

Nov 30, 2003 · Replies 1 · Nov 30, 2003

Replies: 1

Views: 3K

Phobos over Mars: Viking 2's Visual Perspective

Nov 29, 2003 · Replies 3 · Nov 29, 2003

Replies: 3

Views: 4K

Graduate How Does a Particle Gain Negative Energy in Hawking Radiation?

Nov 24, 2003 · Replies 15 · Nov 29, 2003

Replies: 15

Views: 5K

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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