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Astronomy, Astrophysics, Cosmology Forum

Join in expert discussion on the topics of Astronomy, astrophysics and cosmology. This may include discussion on celestial objects, space, and the physical universe as a whole. Mainstream science only.

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

Michael F. Dmitriyev
Jan 31, 2004 · Replies 1 · Feb 7, 2004

Replies: 1

Graduate Thoughts on holographic universe and existence in general

rody084
Jan 14, 2004 · Replies 25 · Feb 6, 2004

Replies: 25

High School Saturn’s Titan Eyed For Increased Exploration

Ivan Seeking
Feb 5, 2004 · Replies 1 · Feb 5, 2004

Replies: 1

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

one_raven
Feb 3, 2004 · Replies 5 · Feb 4, 2004

Replies: 5

Graduate Parabolic reflector mirrors from spinning liquid metal in space

SpaceGuy
Feb 3, 2004 · Replies 1 · Feb 3, 2004

Replies: 1

Undergrad Gravity Questions: Measuring and Speed

mdk42
Feb 3, 2004 · Replies 3 · Feb 3, 2004

Replies: 3

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

SDNess
Feb 1, 2004 · Replies 3 · Feb 3, 2004

Replies: 3

Undergrad Interstellar Travel: Reaching Alpha Centauri

Blhack
Feb 1, 2004 · Replies 5 · Feb 3, 2004

Replies: 5

Undergrad Double Star characteristic frequencies of light

mmfoley
Feb 2, 2004 · Replies 2 · Feb 3, 2004

Replies: 2

US Universities for Postgraduate Studies in Astrophysics

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

Replies: 19

Graduate Will a blackhole shrink spacetime?

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

Replies: 13

Poll

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

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

Replies: 5

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

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

Replies: 5

Looking for a Lunar altitude map

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

Replies: 4

Graduate Alan Guth and Stephen Hawking on Eternal Inflation

marcus
Feb 2, 2004 · Replies 1 · Feb 2, 2004

Replies: 1

Graduate Gravity fiels and spacetime fabric

avemt1
Jan 7, 2004 · Replies 1 · Feb 2, 2004

Replies: 1

Graduate Is there a mathematical proof that the universe is infinite?

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

2

Replies: 37

How to learn astronomy with just the internet and a library

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

Replies: 11

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

Orion1
Jan 15, 2004 · Replies 7 · Jan 31, 2004

Replies: 7

What Happened to Spirit Rover on Mars?

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

2

Replies: 32

Graduate Drake Equation: Solving the Probability of Extraterrestrial Civilizations

Orion1
Jan 29, 2004 · Replies 1 · Jan 30, 2004

Replies: 1

Undergrad Definition of Life: Beyond Organic Matter

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

Replies: 1

Graduate This is kind of WAY in the future but nevertheless:

Sikz
Jan 27, 2004 · Replies 5 · Jan 30, 2004

Replies: 5

Graduate Atheistic explanations for the Big Bang?

plum
Jan 28, 2004 · Replies 3 · Jan 29, 2004

Replies: 3

Graduate Do all galaxies eventually cluster into superclusters?

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

Replies: 3

Graduate Does the universe exist as a meaningful whole without an outside observer?

hellfire
Jan 29, 2004 · Replies 1 · Jan 29, 2004

Replies: 1

Graduate Why the Jovian system is better for colonization than Mars and the Moon

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

3

Replies: 60

High School What is a planet's order called?

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

Replies: 1

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

Ingvar Astrand
Jan 27, 2004 · Replies 2 · Jan 27, 2004

Replies: 2

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

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

Replies: 5

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

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

Replies: 3

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

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

Replies: 4

Graduate Can the Alcubierre drive overcome superluminal travel challenges?

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

Replies: 25

A great day for space exploration

Ivan Seeking
Jan 4, 2004 · Replies 24 · Jan 24, 2004

Replies: 24

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

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

Replies: 5

Galileo mission fact sheets (in case yr interested)

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

Replies: 3

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

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

2

Replies: 34

Undergrad What is the Purpose of the Cosmic Ray Observatory?

Orion1
Jan 13, 2004 · Replies 4 · Jan 23, 2004

Replies: 4

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

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

Replies: 23

Graduate What Are the Best Strategies for Intergalactic Communication?

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

Replies: 14

Graduate Could galaxy evolution be hiding dark energy?

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

Replies: 2

Undergrad Does cosmic expansion affect objects like our hands?

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

Replies: 7

Daft question but it's getting late.

rdt2
Jan 21, 2004 · Replies 4 · Jan 22, 2004

Replies: 4

High School How do you tell if something in the sky is a planet or a star?

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

Replies: 11

Undergrad Finding a planet's mass from satellite orbital data

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

Replies: 22

High School What time does the new moon reach its apex tonight?

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

Replies: 6

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

Thomas2
Jan 10, 2004 · Replies 6 · Jan 21, 2004

Replies: 6

How can we afford space tourism without discounts and referrals?

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

Replies: 6

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

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

Replies: 2

Undergrad What does the sun look like from Mars?

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

Replies: 9

Graduate Galaxy string challenges Models? (News link)

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

Replies: 2

First victim of moon base/Mars mission?

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

Replies: 24

Undergrad LUNAR LASER RANGING Experiment Uncovers Moon's Geology

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

Replies: 1

High School How Does Hubble Take Pictures of the Universe?

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

Replies: 5

Graduate The bathe in a good health space time

hey.like
Dec 15, 2003 · Replies 2 · Jan 18, 2004

Replies: 2

Spirit Landed Successfully, sending pictures

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

Replies: 7

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

benzun_1999
Jan 13, 2004 · Replies 9 · Jan 16, 2004

Replies: 9

When will the first Space Wars happen?

David Ben-Ariel
Jan 9, 2004 · Replies 17 · Jan 16, 2004

Replies: 17

Graduate Why does superheated gas remain hot for billions of years in space?

bobbyg66
Nov 30, 2003 · Replies 22 · Jan 16, 2004

Replies: 22

Graduate Significance of equal Sun and Moon apparent sizes?

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

Replies: 5

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

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

Replies: 1

Graduate Israeli technology enables images beamed from Mars

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

Replies: 5

Solar energy information resources

Mr. Robin Parsons
Jan 10, 2004 · Replies 1 · Jan 15, 2004

Replies: 1

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

Jeff Savage
Jan 14, 2004 · Replies 1 · Jan 14, 2004

Replies: 1

Graduate GEMS - a rich trove of information about galaxy evolution

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

Replies: 5

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

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

Replies: 3

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

wasteofo2
Jan 10, 2004 · Replies 11 · Jan 12, 2004

Replies: 11

Graduate Lensed quasar observations support dark matter models

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

Replies: 11

Undergrad Political and economic arguments for human spaceflight programs

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

Replies: 12

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

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

Replies: 1

Graduate The production of a black hole using television sets

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

Replies: 6

Colliding Galaxies; Hot Gas; New News

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

Replies: 1

Undergrad What is an active galactic nucleus?

Dysprosium
Jan 9, 2004 · Replies 1 · Jan 9, 2004

Replies: 1

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

Labguy
Jan 9, 2004 · Replies 1 · Jan 9, 2004

Replies: 1

Graduate Is the Universe Analog or Digital?

HeyCharley
Jan 7, 2004 · Replies 25 · Jan 9, 2004

Replies: 25

High School Does Jupiter's gravity deform Mars's orbit?

jake_at
Jan 8, 2004 · Replies 6 · Jan 9, 2004

Replies: 6

Graduate Can black holes be used for time travel?

lan418
Jan 4, 2004 · Replies 13 · Jan 9, 2004

Replies: 13

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

ALM
Jan 8, 2004 · Replies 2 · Jan 8, 2004

Replies: 2

Graduate Why does matter fall into black holes if time slows at the horizon?

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

Replies: 8

Newbie Asks "What Contains the Universe?

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

Replies: 17

High School Two questions about space (new guy)

Michael Gray
Jan 7, 2004 · Replies 3 · Jan 7, 2004

Replies: 3

High School How Do Astronomers Determine the Distance of Stars?

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

Replies: 15

Graduate How Do Cosmologists Account for the Age of Quasars?

eclectic_echidna
Jan 3, 2004 · Replies 4 · Jan 6, 2004

Replies: 4

Celestron C-6N reflector: is it a good choice?

Physicsisfun2005
Jan 2, 2004 · Replies 2 · Jan 6, 2004

Replies: 2

High School What could NASA's Mars rover Spirit discover in Gusev Crater?

Adam
Jan 6, 2004 · Replies 1 · Jan 6, 2004

Replies: 1

Graduate The universe has unique center after all->

deda
Jan 5, 2004 · Replies 2 · Jan 5, 2004

Replies: 2

Graduate Does Earth's orbit slow or does its rotation slow?

Jeebus
Jan 3, 2004 · Replies 1 · Jan 4, 2004

Replies: 1

Graduate How can a black hole attract nothing at all?

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

Replies: 13

Graduate Can quantum vacuum energy or string theory account for dark energy?

exeric
Jan 2, 2004 · Replies 5 · Jan 3, 2004

Replies: 5

High School Is there more than just one Universe?

Fagin
Dec 29, 2003 · Replies 4 · Jan 3, 2004

Replies: 4

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

Ivan Seeking
Jan 1, 2004 · Replies 5 · Jan 2, 2004

Replies: 5

Graduate How do we feel gravity from a black hole if gravitons can't exceed light speed?

jay
Jan 2, 2004 · Replies 2 · Jan 2, 2004

Replies: 2

Graduate Can accelerating cosmic expansion reach the speed of light?

What Do I Know?
Jan 1, 2004 · Replies 2 · Jan 1, 2004

Replies: 2

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

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

Replies: 9

Graduate Laws of gravitational attraction

Kanelous
Dec 3, 2003 · Replies 21 · Dec 30, 2003

Replies: 21

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

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

Replies: 19

Graduate Does empty space extend infinitely beyond the observable universe?

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

Replies: 17

Undergrad What is the mass of a black hole the size of a tennis ball?

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

Replies: 1

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

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

Replies: 20

Communication with Extraterrestrial Life

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

2

Replies: 52

sidebar

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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