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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 is the significance of being in the eigenspace of Christ?

arildno
Jan 28, 2005 · Replies 8 · Feb 13, 2005

Replies: 8

Habitable Star Systems: Where Can We Find Maggie Turnbull's Catalogue?

Mean-Hippy
Feb 11, 2005 · Replies 1 · Feb 13, 2005

Replies: 1

Undergrad Temperature calculation for planet orbiting CHARA at 1 AU

Mean-Hippy
Feb 11, 2005 · Replies 7 · Feb 13, 2005

Replies: 7

Graduate A Universe That Is More Life-Producing?

Gold Barz
Feb 8, 2005 · Replies 16 · Feb 12, 2005

Replies: 16

Twisted Meteor Train - A Sight to Behold

meteor
Feb 12, 2005 · Replies 1 · Feb 12, 2005

Replies: 1

Undergrad Finding a Formula for Determining G Forces in Space Travel

freespace2dotcom
Jan 22, 2005 · Replies 12 · Feb 11, 2005

Replies: 12

Graduate Can We Talk of Points of Space?

misster y
Jan 18, 2005 · Replies 10 · Feb 11, 2005

Replies: 10

High School Finding Solar Path Data - Resources for Sun Position in Sky

ALime88
Feb 10, 2005 · Replies 2 · Feb 10, 2005

Replies: 2

Galaxy was headed at us at like 100 times faster than a bullet

Daark Nova
Jan 31, 2005 · Replies 14 · Feb 10, 2005

Replies: 14

Graduate What is M theory and how does it relate to string theory?

Kakorot
Feb 8, 2005 · Replies 3 · Feb 9, 2005

Replies: 3

High School How Can Light Exist When Time is Stopped?

spooky
Feb 9, 2005 · Replies 5 · Feb 9, 2005

Replies: 5

Graduate Does an infinite universe always repeat its parts?

Loren Booda
Jan 20, 2005 · Replies 15 · Feb 9, 2005

Replies: 15

Graduate Infinite Universe Energy: CMBR Impact?

gonzo
Feb 9, 2005 · Replies 1 · Feb 9, 2005

Replies: 1

Graduate Baryonic mass figures from the Galaxy Red Shift Survey

wolram
Feb 7, 2005 · Replies 7 · Feb 8, 2005

Replies: 7

Is Sending Machines into Deep Space a Wise Decision for Humanity's Future?

Daark Nova
Jan 31, 2005 · Replies 12 · Feb 8, 2005

Replies: 12

Is an Astronomy Degree Practical?

stjimmy
Jan 29, 2005 · Replies 10 · Feb 8, 2005

Replies: 10

Is NASA Replacing Columbia with a New Shuttle?

Moneer81
Feb 2, 2005 · Replies 10 · Feb 7, 2005

Replies: 10

Undergrad How Is Dark Matter So Hot Yet Invisible?

Mean-Hippy
Feb 4, 2005 · Replies 10 · Feb 7, 2005

Replies: 10

Graduate Which theory best explains the origin of matter in the universe?

MrBlonde
Jan 28, 2005 · Replies 7 · Feb 7, 2005

Replies: 7

Graduate GoldBarz asks: wd laws work in different dimens. universe?

marcus
Feb 4, 2005 · Replies 5 · Feb 7, 2005

Replies: 5

Graduate How can atoms exist in a black hole's singularity if they can't be compressed?

Undomiel
Jan 25, 2005 · Replies 11 · Feb 6, 2005

Replies: 11

Undergrad The Big Splat: Origin of Our Moon

chronon
Feb 4, 2005 · Replies 3 · Feb 6, 2005

Replies: 3

Graduate Why do stars have an upper mass limit around 150-200 solar masses?

marcus
Feb 5, 2005 · Replies 3 · Feb 6, 2005

Replies: 3

High School How do you calculate the sun's angle from an object's shadow?

Ba
Feb 2, 2005 · Replies 7 · Feb 5, 2005

Replies: 7

Graduate Is Science Fiction a Legitimate Source of Scientific Ideas?

Ivan Seeking
Jan 28, 2005 · Replies 8 · Feb 5, 2005

Replies: 8

Graduate Find the universe point of origin based on location of cellestrella bodies?

whatzzupboy
Jan 25, 2005 · Replies 4 · Feb 4, 2005

Replies: 4

Graduate How do physicists know the universe is mostly normal matter not antimatter?

Icebreaker
Jan 22, 2005 · Replies 8 · Feb 4, 2005

Replies: 8

State Your Opinion on String Theory

Daark Nova
Feb 3, 2005 · Replies 5 · Feb 4, 2005

Replies: 5

Graduate Hubbles's law and the Dark Energy Component

Lacy33
Feb 4, 2005 · Replies 4 · Feb 4, 2005

Replies: 4

Undergrad Scientists see high likelihood of ET visitors

Ivan Seeking
Jan 14, 2005 · Replies 22 · Feb 4, 2005

Replies: 22

Graduate Solar super-sail could reach Mars in a month

Ivan Seeking
Feb 1, 2005 · Replies 9 · Feb 4, 2005

Replies: 9

Graduate The predictions it makes don't agree with reality. Enough said

Tapsnap
Feb 3, 2005 · Replies 3 · Feb 3, 2005

Replies: 3

High School How was all the universe's matter compressed in the big bang?

Daark Nova
Jan 31, 2005 · Replies 10 · Feb 3, 2005

Replies: 10

Graduate Do branes colliding create universes?

Gold Barz
Feb 2, 2005 · Replies 8 · Feb 3, 2005

Replies: 8

Graduate Does Cosmology Need Radical Ideas Like Transforming Dark Matter and Dark Energy?

marcus
Feb 2, 2005 · Replies 1 · Feb 2, 2005

Replies: 1

Graduate Life Improbable In 4D+ Universes

Gold Barz
Jan 31, 2005 · Replies 11 · Feb 2, 2005

Replies: 11

Graduate Could a Closed Universe Reverse Time During Collapse?

Rasine
Jan 30, 2005 · Replies 2 · Feb 1, 2005

Replies: 2

Graduate In The Future Beyond The Dark Era

Gold Barz
Jan 31, 2005 · Replies 4 · Feb 1, 2005

Replies: 4

Graduate Do buoyancy and density cancel in a black hole?

Ryan H
Jan 27, 2005 · Replies 7 · Feb 1, 2005

Replies: 7

Graduate Could polarization errors in IMAP data invalidate dark matter and dark energy theory?

Louis Cypher
Jan 20, 2005 · Replies 2 · Feb 1, 2005

Replies: 2

Graduate Do CMB perturbations correspond to large-scale structure in the Sloan Survey?

saltydog
Jan 30, 2005 · Replies 7 · Jan 31, 2005

Replies: 7

Undergrad What are the smallest orbital masses that can exist in space?

Glenn
Jan 28, 2005 · Replies 16 · Jan 31, 2005

Replies: 16

Graduate What is the nature of baryonic dark matter in Galactic Blobs?

Garth
Jan 28, 2005 · Replies 13 · Jan 31, 2005

Replies: 13

Undergrad Question regarding Supernova SN1987

Oblivion
Jan 30, 2005 · Replies 4 · Jan 31, 2005

Replies: 4

Undergrad Was the sun ever a blue star in the early stages of its life?

Bladibla
Jan 28, 2005 · Replies 17 · Jan 30, 2005

Replies: 17

Undergrad Delta v needed to move Hubble closer to the ISS

marrsc
Jan 22, 2005 · Replies 9 · Jan 29, 2005

Replies: 9

Graduate What tests would select between competing cosmological theories?

wolram
Jan 22, 2005 · Replies 3 · Jan 28, 2005

Replies: 3

Undergrad The largest explosion ever seen in space

Chronos
Jan 6, 2005 · Replies 8 · Jan 27, 2005

Replies: 8

Graduate Spacetime interval formula - what's the d?

NanakiXIII
Jan 27, 2005 · Replies 8 · Jan 27, 2005

Replies: 8

Graduate Supergalactic node locations in ecliptic coordinates

Graham Fox
Jan 25, 2005 · Replies 7 · Jan 27, 2005

Replies: 7

High School Is Moisture Harmful to Telescope Lenses in Cold Weather?

redrum781
Jan 27, 2005 · Replies 2 · Jan 27, 2005

Replies: 2

Undergrad Did time exist before the Big Bang?

sero
Jan 14, 2005 · Replies 28 · Jan 26, 2005

Replies: 28

Graduate Couldn't the end of spacetime cause spacetime?

J_desu101
Nov 27, 2004 · Replies 12 · Jan 26, 2005

Replies: 12

Graduate Can matter escape from the universe?

Ivan Seeking
Jan 25, 2005 · Replies 11 · Jan 26, 2005

Replies: 11

Undergrad Long Lost Star Catalog Found in Plain Sight

Ivan Seeking
Jan 25, 2005 · Replies 2 · Jan 25, 2005

Replies: 2

Has the Tsunami Changed Our Pole Star?

vinee
Jan 25, 2005 · Replies 2 · Jan 25, 2005

Replies: 2

Graduate What are the giant infrared blobs detected by Spitzer?

Garth
Jan 11, 2005 · Replies 39 · Jan 24, 2005

2

Replies: 39

Graduate Is dark energy needed in a perturbed universe.

wolram
Jan 21, 2005 · Replies 7 · Jan 24, 2005

Replies: 7

Graduate What Causes the Bright Streaks on Saturn's Moon Titan?

Phobos
Jan 4, 2005 · Replies 9 · Jan 24, 2005

Replies: 9

Graduate Is the Universe Losing Mass Due to Heat Loss and Dark Energy Expansion?

Les Sleeth
Jan 21, 2005 · Replies 17 · Jan 24, 2005

Replies: 17

Hubble fix-up funds cut (MSN 21 Jan)

marcus
Jan 21, 2005 · Replies 9 · Jan 24, 2005

Replies: 9

Will the Huygens probe land successfully on Titan?

DaveC426913
Jan 12, 2005 · Replies 73 · Jan 22, 2005

3

Replies: 73

High School Velocity of a galaxy, is it the rotating speed around itself?

A_I_
Jan 22, 2005 · Replies 1 · Jan 22, 2005

Replies: 1

High School What Causes Earth's Tilt on Its Axis?

jjjsarnis
Jan 21, 2005 · Replies 4 · Jan 22, 2005

Replies: 4

Graduate What is the Mass-Luminosity Relationship for Stars?

abyssoft
Jan 20, 2005 · Replies 1 · Jan 22, 2005

Replies: 1

Graduate Why isn't all matter concentrated at the Big Bang's center if it spread outward?

Mr_Euchre
Jan 11, 2005 · Replies 6 · Jan 21, 2005

Replies: 6

Undergrad Where are the solar systems like our own?

timken
Jan 12, 2005 · Replies 5 · Jan 21, 2005

Replies: 5

Graduate Antimatter in Space: How Could It Exist?

z-component
Jan 19, 2005 · Replies 2 · Jan 20, 2005

Replies: 2

Undergrad Are Cosmic Rays Particles or Waves?

Glenn
Jan 18, 2005 · Replies 12 · Jan 20, 2005

Replies: 12

Stargazing APS neutrino astrophysics and cosmology working group report

Chronos
Jan 12, 2005 · Replies 1 · Jan 20, 2005

Replies: 1

Graduate What Are the Radiation Levels Inside and Outside Earth's Belts?

reaper
Jan 18, 2005 · Replies 13 · Jan 20, 2005

Replies: 13

High School How does the expansion of space work if not like an explosion?

woz
Jan 17, 2005 · Replies 6 · Jan 19, 2005

Replies: 6

The Unending Universe: What Comes Next?

tph666
Jan 18, 2005 · Replies 1 · Jan 19, 2005

Replies: 1

Graduate Bekenstein's rival to Dark Matter

marcus
Dec 29, 2004 · Replies 9 · Jan 18, 2005

Replies: 9

Have you seen new images of Titan?

somy
Jan 17, 2005 · Replies 3 · Jan 17, 2005

Replies: 3

Undergrad Should we create an artificial frictional medium like an atmosphere?

EngTechno
Jan 16, 2005 · Replies 2 · Jan 17, 2005

Replies: 2

Undergrad Measuring the rotation speed of Io

Link
Jan 16, 2005 · Replies 5 · Jan 17, 2005

Replies: 5

Graduate Calculating E or M from a State Vector

kepler
Oct 15, 2004 · Replies 18 · Jan 15, 2005

Replies: 18

Undergrad Doppler effect and color of stars

nseth1
Jan 12, 2005 · Replies 10 · Jan 14, 2005

Replies: 10

Graduate Average distance to nearest star in line of sight

homology
Jan 13, 2005 · Replies 5 · Jan 14, 2005

Replies: 5

High School Deep Impact: NASA's Mission to Smash a Comet on the Fourth of July

Orion1
Jan 14, 2005 · Replies 1 · Jan 14, 2005

Replies: 1

High School Can astronauts see colors in space without Earth's atmosphere?

Kerrie
Sep 19, 2004 · Replies 15 · Jan 13, 2005

Replies: 15

Successful launch of Deep Impact

Phobos
Jan 12, 2005 · Replies 4 · Jan 13, 2005

Replies: 4

Graduate Can topology determine whether the universe is spatially finite or infinite?

ryokan
Dec 20, 2004 · Replies 12 · Jan 13, 2005

Replies: 12

Graduate Can atoms in a black hole move if they're compressed?

UrbanXrisis
Jan 6, 2005 · Replies 13 · Jan 13, 2005

Replies: 13

Graduate What Role Do Shock Waves Play in Star Formation from Interstellar Clouds?

nobunaga84
Jan 11, 2005 · Replies 2 · Jan 12, 2005

Replies: 2

Largest known stars discovered by astronomers

Chronos
Jan 11, 2005 · Replies 2 · Jan 12, 2005

Replies: 2

Undergrad What does a represent in the apogee and perigee equations?

neiliam
Jan 11, 2005 · Replies 2 · Jan 11, 2005

Replies: 2

High School Will We Find Extraterrestrial Life Within the Next Twenty Years?

Ivan Seeking
Jan 8, 2005 · Replies 19 · Jan 10, 2005

Replies: 19

High School What is the main sequence and why do stars spend most of their lives there?

Mk
Jan 8, 2005 · Replies 5 · Jan 10, 2005

Replies: 5

Graduate How large would a neutron star chunk need to be to equal Earth's mass?

errorist
Jan 5, 2005 · Replies 30 · Jan 10, 2005

2

Replies: 30

Graduate Non-linear universe and thoughts on conciousness

DJmaux
Dec 28, 2004 · Replies 2 · Jan 10, 2005

Replies: 2

The universe is all in our heads

Rasine
Jul 31, 2004 · Replies 28 · Jan 10, 2005

Replies: 28

New U.S. Plan for Space Exploration

Evo
Jan 9, 2004 · Replies 17 · Jan 9, 2005

Replies: 17

High School Describing black holes for middle grade students

DaveC426913
Jan 4, 2005 · Replies 29 · Jan 8, 2005

Replies: 29

Undergrad How Will the Universe End? Big Crunch Theory

UrbanXrisis
Nov 22, 2004 · Replies 47 · Jan 8, 2005

2

Replies: 47

High School Friday the 13th, 2029? The odds of impact

Ivan Seeking
Dec 27, 2004 · Replies 36 · Jan 8, 2005

2

Replies: 36

Undergrad Where did the energy for the Big Bang come from?

Chrono
Jan 5, 2005 · Replies 9 · Jan 8, 2005

Replies: 9

Graduate Under what conditions does star bifurcation occur?

Loren Booda
Jan 5, 2005 · Replies 3 · Jan 8, 2005

Replies: 3

Undergrad Terrestrial, asteroidal and gaseous

Loren Booda
Jan 5, 2005 · Replies 3 · Jan 7, 2005

Replies: 3

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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