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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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High School Eight Grader's Question on Deflecting Asteroids

Zeke
Oct 14, 2003 · Replies 1 · Oct 15, 2003

Replies: 1

High School What Determines the Gravity of Planets?

chetan
Oct 15, 2003 · Replies 3 · Oct 15, 2003

Replies: 3

What are some lesser-known space programs around the world?

Phobos
Oct 3, 2003 · Replies 4 · Oct 15, 2003

Replies: 4

Spectroscopic analysis suggests 37 Geminorum may harbor life

Ivan Seeking
Oct 9, 2003 · Replies 15 · Oct 14, 2003

Replies: 15

Graduate Why Do We Only Experience Four Dimensions?

echolocator
Oct 9, 2003 · Replies 3 · Oct 14, 2003

Replies: 3

Witnessing the Moon's Rapid Set - A Fall Foliage Experiment

Phobos
Oct 13, 2003 · Replies 1 · Oct 13, 2003

Replies: 1

Graduate Astronomy, Cosmology, and physics of old

Nereid
Oct 6, 2003 · Replies 16 · Oct 13, 2003

Replies: 16

Graduate Conceptional Space/Matter Cosmology,PART2

Poorichard2
Oct 11, 2003 · Replies 6 · Oct 12, 2003

Replies: 6

Graduate From the begining there was nothing and in the end

scott_sieger
Oct 11, 2003 · Replies 3 · Oct 12, 2003

Replies: 3

Undergrad Does Titan Have Oily Oceans?

Ivan Seeking
Oct 7, 2003 · Replies 3 · Oct 12, 2003

Replies: 3

Graduate Is the Universe Expanding in All Directions at the Same Rate?

Allday
Oct 7, 2003 · Replies 10 · Oct 12, 2003

Replies: 10

Undergrad Are projectile paths parabolas or partial ellipses?

Math Is Hard
Oct 7, 2003 · Replies 12 · Oct 11, 2003

Replies: 12

Graduate Is the Universe Shaped Like a Dodecahedron?

Guybrush Threepwood
Oct 9, 2003 · Replies 1 · Oct 11, 2003

Replies: 1

Graduate How does gravitational lensing support the expansion of space?

wolram
Oct 7, 2003 · Replies 8 · Oct 11, 2003

Replies: 8

Undergrad How Do Contact Binary Stars Coexist Without Destruction?

wolram
Jun 9, 2003 · Replies 19 · Oct 11, 2003

Replies: 19

New Mars photos from Mars Global Surveyor

Ivan Seeking
Oct 8, 2003 · Replies 6 · Oct 10, 2003

Replies: 6

Graduate Conceptional space/time cosmology

Poorichard2
Oct 5, 2003 · Replies 6 · Oct 9, 2003

Replies: 6

Graduate Proving Least-Energy Orbits of Spacecraft

Lonewolf
Oct 7, 2003 · Replies 5 · Oct 8, 2003

Replies: 5

Graduate How did light reach us from quasars with redshift above 1.7?

marcus
Oct 4, 2003 · Replies 11 · Oct 8, 2003

Replies: 11

What's Really Visible from Space: space.com

Ivan Seeking
Oct 8, 2003 · Replies 2 · Oct 8, 2003

Replies: 2

Pictures of the sun's current sunspots?

art46052
Sep 28, 2003 · Replies 2 · Oct 7, 2003

Replies: 2

Graduate Why can't nanosecond pulsars be used to measure universe expansion?

wolram
Sep 8, 2003 · Replies 14 · Oct 7, 2003

Replies: 14

Graduate Gravitational Collapse of Protostars: When Does Fusion Begin?

StephenPrivitera
Oct 6, 2003 · Replies 5 · Oct 7, 2003

Replies: 5

Time Before The Universe Was Created

krusty the clown
Oct 2, 2003 · Replies 8 · Oct 5, 2003

Replies: 8

Graduate Calculating Wormholes: Scientists and Differential Geometry

hawaiidude
Oct 5, 2003 · Replies 2 · Oct 5, 2003

Replies: 2

What Are the Best Online Resources for Astronomy History?

marcus
Oct 5, 2003 · Replies 1 · Oct 5, 2003

Replies: 1

Graduate Hubble chases exploding stars: re dark energy

Ivan Seeking
Oct 1, 2003 · Replies 1 · Oct 3, 2003

Replies: 1

Undergrad Can Black Holes Truly Attract Light?

benzun_1999
Oct 1, 2003 · Replies 7 · Oct 2, 2003

Replies: 7

Graduate What Causes the Tidal Force and How Does it Affect the Earth's Rotation?

StephenPrivitera
Sep 27, 2003 · Replies 1 · Oct 1, 2003

Replies: 1

Stargazing Have you built your own telescope?

Artman
Sep 17, 2003 · Replies 7 · Oct 1, 2003

Replies: 7

Graduate Conceptual Question in Gibbs Orbit Determination

enigma
Sep 25, 2003 · Replies 4 · Sep 30, 2003

Replies: 4

Undergrad What Are Parallel Universes and Their Infinite Possibilities?

The Hinge
Sep 20, 2003 · Replies 16 · Sep 30, 2003

Replies: 16

Graduate Gamma rays may have devastated life on Earth: Newscientist.com

Ivan Seeking
Sep 25, 2003 · Replies 4 · Sep 30, 2003

Replies: 4

Undergrad What Does Wave Rating Mean in Telescope Mirrors?

Artman
Sep 17, 2003 · Replies 3 · Sep 29, 2003

Replies: 3

Graduate Schrodingers Equation in 3 space Dimension

hell18
Sep 28, 2003 · Replies 5 · Sep 29, 2003

Replies: 5

High School Why is Jupiter so much larger than the terrestrial planets?

Nim
Sep 25, 2003 · Replies 12 · Sep 29, 2003

Replies: 12

Graduate Probability over space or time in spacetime

Loren Booda
Sep 23, 2003 · Replies 1 · Sep 28, 2003

Replies: 1

Graduate Endless geodesics in closed spacetime

Loren Booda
Sep 25, 2003 · Replies 1 · Sep 28, 2003

Replies: 1

Undergrad Luminosity, Flux, Time: What Do They Mean?

StephenPrivitera
Sep 28, 2003 · Replies 1 · Sep 28, 2003

Replies: 1

Pluto mission saved from cancellation by Planetary Society

Phobos
Sep 25, 2003 · Replies 3 · Sep 28, 2003

Replies: 3

Undergrad Dwarfs: Where Does Their Energy Come From?

STAii
Sep 28, 2003 · Replies 4 · Sep 28, 2003

Replies: 4

Undergrad Does Infinity Exist in the Universe?

carla
Aug 23, 2003 · Replies 46 · Sep 28, 2003

2

Replies: 46

Undergrad Do tidal forces stretch the Milky Way as the Magellanic Clouds orbit?

Smiley
Sep 7, 2003 · Replies 4 · Sep 27, 2003

Replies: 4

Graduate New formulas relating G to universe expansion and redshift

JMartin
Aug 29, 2003 · Replies 3 · Sep 27, 2003

Replies: 3

High School How efficient are we at detecting near Earth objects?

Ivan Seeking
Sep 25, 2003 · Replies 1 · Sep 27, 2003

Replies: 1

Undergrad What is Gravitational Radiation and How Does it Affect Orbital Speed in Pulsars?

deliveryman
Sep 24, 2003 · Replies 2 · Sep 24, 2003

Replies: 2

Undergrad Can an orbiting object deorbit what it's revolving around?

deliveryman
Sep 23, 2003 · Replies 7 · Sep 24, 2003

Replies: 7

Undergrad Call to extend [mainstream] alien life search: BBC

Ivan Seeking
Sep 17, 2003 · Replies 4 · Sep 24, 2003

Replies: 4

Undergrad Why did time begin with the big bang?

Zantra
Jul 29, 2003 · Replies 17 · Sep 23, 2003

Replies: 17

High School Goodbye, Galileo: NASA's Historic Jupiter Mission Comes to an End

Phobos
Sep 22, 2003 · Replies 1 · Sep 22, 2003

Replies: 1

Undergrad Is Earth Expansion a New Cosmology Case?

clicky
Sep 21, 2003 · Replies 3 · Sep 22, 2003

Replies: 3

Undergrad New On-line Cosmology Calculator

marcus
Sep 21, 2003 · Replies 1 · Sep 21, 2003

Replies: 1

Galileo spacecraft impact with Jupiter

Ivan Seeking
Sep 19, 2003 · Replies 1 · Sep 20, 2003

Replies: 1

Undergrad Giant star caught swallowing three planets: Newscientist.com

Ivan Seeking
Sep 18, 2003 · Replies 1 · Sep 18, 2003

Replies: 1

Graduate Black hole singularity model for Big Bang initial parameter precision

Royce
Sep 16, 2003 · Replies 7 · Sep 17, 2003

Replies: 7

Graduate Are Superluminal Recession Velocities Consistent with Special Relativity?

marcus
Aug 24, 2003 · Replies 4 · Sep 17, 2003

Replies: 4

Jupiter probe nears fiery end: BBC

Ivan Seeking
Sep 17, 2003 · Replies 1 · Sep 17, 2003

Replies: 1

Undergrad Recommendation about Celestial Mechanics

MathematicalPhysicist
Sep 17, 2003 · Replies 2 · Sep 17, 2003

Replies: 2

Strange marker in Kansas City and worldwide similar sites

Ivan Seeking
Sep 9, 2003 · Replies 3 · Sep 17, 2003

Replies: 3

Undergrad Escape velocity and formulas for circular orbits

StephenPrivitera
Sep 16, 2003 · Replies 2 · Sep 16, 2003

Replies: 2

Graduate Angular momentum, torque and eccentricity

StephenPrivitera
Sep 16, 2003 · Replies 1 · Sep 16, 2003

Replies: 1

Graduate Is the Cosmological Constant a Result of Spacetime's Tendency to Be Flat?

Royce
Sep 16, 2003 · Replies 4 · Sep 16, 2003

Replies: 4

Why Do People Find Joy in Stargazing and Astronomy?

Artman
Sep 11, 2003 · Replies 5 · Sep 16, 2003

Replies: 5

Undergrad What manner of nonsense is this?

Phobos
Sep 11, 2003 · Replies 17 · Sep 16, 2003

Replies: 17

Is There Shade in Outer Space?

zoobyshoe
Sep 9, 2003 · Replies 27 · Sep 15, 2003

Replies: 27

Graduate Is Dark Matter Energy Lost from Redshifted Radiation?

JMartin
Sep 13, 2003 · Replies 1 · Sep 14, 2003

Replies: 1

Graduate LQG and the begining of the universe

MathematicalPhysicist
Sep 14, 2003 · Replies 2 · Sep 14, 2003

Replies: 2

Graduate Why is my theory of dark energy as the universe's origin wrong?

wolram
Sep 11, 2003 · Replies 17 · Sep 13, 2003

Replies: 17

Who contributed to Astronomy most?

Shadow
Sep 5, 2003 · Replies 1 · Sep 13, 2003

Replies: 1

Undergrad How Do Astronomers Accurately Count Stars in the Universe?

ShadowKnight
Sep 12, 2003 · Replies 5 · Sep 12, 2003

Replies: 5

High School Can a Vacuum Pump Simulate Planetary Orbits?

Echo 6 Sierra
Sep 5, 2003 · Replies 11 · Sep 12, 2003

Replies: 11

Undergrad Is the Big Bang Theory Flawed?

hypnagogue
Sep 10, 2003 · Replies 6 · Sep 12, 2003

Replies: 6

High School Is the Universe Really 30 Billion Light Years Across?

Blhack
Sep 11, 2003 · Replies 2 · Sep 12, 2003

Replies: 2

Graduate What is the half-light radius of a galaxy?

mathman
Sep 11, 2003 · Replies 1 · Sep 11, 2003

Replies: 1

High School Where to Find Celestial Objects Visible from Light Polluted Areas

kleinma
Aug 28, 2003 · Replies 3 · Sep 11, 2003

Replies: 3

Graduate What is the upper mass limit of a neutron star?

kokain
Sep 11, 2003 · Replies 2 · Sep 11, 2003

Replies: 2

Undergrad Supermassive Black Hole Sings for Its Supper: Scientific American

Ivan Seeking
Sep 10, 2003 · Replies 3 · Sep 11, 2003

Replies: 3

Graduate What properties does space have beyond being a vacuum?

wolram
Jun 14, 2003 · Replies 25 · Sep 10, 2003

Replies: 25

Graduate What Are the Properties of Dark Energy?

Theory Andy
Aug 30, 2003 · Replies 4 · Sep 10, 2003

Replies: 4

Graduate Kepler's 2nd Law: Relation of dA/dt to L

StephenPrivitera
Sep 9, 2003 · Replies 4 · Sep 10, 2003

Replies: 4

Asteroid danger in 2014 downplayed: BBC

Ivan Seeking
Sep 2, 2003 · Replies 3 · Sep 10, 2003

Replies: 3

Graduate Universe turned inside out at time zero

marcus
Sep 5, 2003 · Replies 17 · Sep 9, 2003

Replies: 17

Mars' lumpy landforms

Ivan Seeking
Sep 3, 2003 · Replies 6 · Sep 8, 2003

Replies: 6

Graduate Has Hawking radiation been observed?

wolram
Sep 3, 2003 · Replies 18 · Sep 6, 2003

Replies: 18

Chances of a catastrophic collision

kleinma
Sep 2, 2003 · Replies 4 · Sep 3, 2003

Replies: 4

Tragedy in Brazil's new space program

Phobos
Aug 25, 2003 · Replies 5 · Sep 2, 2003

Replies: 5

Graduate What is the relationship between inflation and the beginning of the universe?

heusdens
Aug 31, 2003 · Replies 6 · Sep 2, 2003

Replies: 6

Graduate Explaination of the universe is generaly excepted

wolram
Aug 28, 2003 · Replies 8 · Sep 2, 2003

Replies: 8

Undergrad Different types of multiverses

Adam
Aug 31, 2003 · Replies 15 · Sep 2, 2003

Replies: 15

Graduate Is a Universe with a Center More Plausible?

clicky
Aug 31, 2003 · Replies 3 · Sep 2, 2003

Replies: 3

Graduate Doppler shift and red/blue shift

Tyro
Sep 1, 2003 · Replies 4 · Sep 2, 2003

Replies: 4

Graduate Most things in our universe have rotation

wolram
Aug 30, 2003 · Replies 16 · Sep 1, 2003

Replies: 16

High School What would happen to the Sun's color if it suddenly shrank?

redruM
Aug 14, 2003 · Replies 11 · Aug 31, 2003

Replies: 11

High School What is the best and safest way to view the sun through a telescope?

Dagenais
Aug 28, 2003 · Replies 4 · Aug 31, 2003

Replies: 4

High School What is the concept of a Meridian Circle?

STAii
Aug 25, 2003 · Replies 7 · Aug 31, 2003

Replies: 7

Undergrad What is the evidence for black holes?

wolram
Aug 28, 2003 · Replies 16 · Aug 31, 2003

Replies: 16

Undergrad How can gravity affect spacetime if it has nothing to grab?

Tail
Aug 27, 2003 · Replies 22 · Aug 30, 2003

Replies: 22

High School Why don't high schools teach astronomy?

Dagenais
Aug 30, 2003 · Replies 1 · Aug 30, 2003

Replies: 1

Graduate Is the Universe Ruled by a Simple Algorithm?

meteor
Aug 11, 2003 · Replies 19 · Aug 30, 2003

Replies: 19

Graduate Round One: Big Bang vs. Little Bang

Steven Taylor
Aug 29, 2003 · Replies 4 · Aug 30, 2003

Replies: 4

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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