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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 Is the Universe a Hologram According to Quantum Mechanics Research?

wuliheron
Aug 7, 2003 · Replies 6 · Nov 22, 2003

Replies: 6

High School How Much of Space is Habitable?

wolram
Oct 31, 2003 · Replies 5 · Nov 22, 2003

Replies: 5

Graduate Finding a planet's radius from satellite visibility angles

johnW
Nov 21, 2003 · Replies 1 · Nov 22, 2003

Replies: 1

Stargazing Building a refractor telescope

bombshop
Nov 7, 2003 · Replies 8 · Nov 21, 2003

Replies: 8

Graduate Do Black Holes Create New Universes?

photon
Nov 20, 2003 · Replies 13 · Nov 21, 2003

Replies: 13

Graduate Why is it easier to measure overall structure of Andromeda Galaxy than

BFern
Nov 20, 2003 · Replies 4 · Nov 21, 2003

Replies: 4

High School If the universe is infinite, how do we know our distance from its center?

jimmy p
Nov 20, 2003 · Replies 7 · Nov 21, 2003

Replies: 7

Undergrad Can you measure a star's diameter directly?

Chemicalsuperfreak
Nov 9, 2003 · Replies 7 · Nov 21, 2003

Replies: 7

Graduate Big Bang at every point in space?

Nibles
Nov 19, 2003 · Replies 2 · Nov 20, 2003

Replies: 2

Meet the closest unmaker dont ponder on it

Phobo
Nov 19, 2003 · Replies 5 · Nov 20, 2003

Replies: 5

Graduate Does Time Exist Without Physical Progress in the Space Time Unit Structure?

hey.like
Nov 18, 2003 · Replies 1 · Nov 20, 2003

Replies: 1

Galileo spacecraft mission to Jupiter

Greg Bernhardt
Nov 19, 2003 · Replies 4 · Nov 20, 2003

Replies: 4

Undergrad Did the Big Bang Really Happen and What Evidence Supports It?

Nicool003
Mar 23, 2003 · Replies 23 · Nov 20, 2003

Replies: 23

Graduate Where does the speed gain come from in a gravitational slingshot?

Tyro
Nov 10, 2003 · Replies 11 · Nov 19, 2003

Replies: 11

Undergrad How Do Planetary Rings Form and Move?

Slatiebartfarce
Nov 4, 2003 · Replies 8 · Nov 19, 2003

Replies: 8

Graduate Upper Limit of Energy for Gamma Ray Bursts?

selfAdjoint
Nov 8, 2003 · Replies 7 · Nov 19, 2003

Replies: 7

Undergrad Sun light traveling to earth speed

H_Dog
Nov 19, 2003 · Replies 1 · Nov 19, 2003

Replies: 1

Undergrad Does the Sun Move and What Forces Drive its Motion?

Milamber
Nov 3, 2003 · Replies 8 · Nov 19, 2003

Replies: 8

Graduate What are Key Questions About the Expansion of the Universe?

burak_ilhan
Nov 18, 2003 · Replies 4 · Nov 19, 2003

Replies: 4

Undergrad Why Do Astronomers Relate Star Distance to Universe Age?

Gonçalo
Nov 17, 2003 · Replies 2 · Nov 18, 2003

Replies: 2

Graduate Hologramatic universe and the philosophy of nonduality

phoenixthoth
Nov 16, 2003 · Replies 1 · Nov 17, 2003

Replies: 1

Undergrad Could Jupiter's Radiation Power Space Probes Instead of Damaging Them?

LURCH
Nov 16, 2003 · Replies 6 · Nov 17, 2003

Replies: 6

Undergrad Good read for basic background info

Jiggs
Nov 14, 2003 · Replies 2 · Nov 17, 2003

Replies: 2

Where is Mars in the sky right now?

Ivan Seeking
Aug 18, 2003 · Replies 18 · Nov 16, 2003

Replies: 18

Graduate What are event horizons, singularities and Schwarzschild radius?

Inquiring_Mike
Nov 16, 2003 · Replies 3 · Nov 16, 2003

Replies: 3

Graduate Is the universe a three-dimensional net with time as motion through it?

QuantumNet
Nov 13, 2003 · Replies 1 · Nov 15, 2003

Replies: 1

NOVA: The Elegant Universe - Released on Internet

dduardo
Nov 14, 2003 · Replies 1 · Nov 14, 2003

Replies: 1

High School Is Space-Time Governed by Universal Rules?

benzun_1999
Nov 13, 2003 · Replies 4 · Nov 14, 2003

Replies: 4

Undergrad Looking for latest info on a few topics

sero
Nov 14, 2003 · Replies 2 · Nov 14, 2003

Replies: 2

Graduate Is Our Galaxy Destined to Merge with the Great Attractor?

wolram
Nov 13, 2003 · Replies 3 · Nov 14, 2003

Replies: 3

Undergrad Determining Age of Universe Using Hubbles Constant

radius
Nov 13, 2003 · Replies 1 · Nov 13, 2003

Replies: 1

Undergrad What measurement in 2003 confirmed dark matter evidence?

Math Is Hard
Oct 27, 2003 · Replies 5 · Nov 12, 2003

Replies: 5

Undergrad Calculating star distance from parallax angle

radius
Nov 12, 2003 · Replies 10 · Nov 12, 2003

Replies: 10

Graduate Is Human Behavior a Microcosm of Cosmic Forces?

cosmicbro
Nov 10, 2003 · Replies 2 · Nov 11, 2003

Replies: 2

High School Canis Major Dwarf Galaxy being consumed by the Milky Way

meteor
Nov 6, 2003 · Replies 9 · Nov 11, 2003

Replies: 9

Graduate Variable Speed of Light Cosmology: An Alternative to Inflation

Glenn
Nov 10, 2003 · Replies 3 · Nov 10, 2003

Replies: 3

Graduate Does the contingency argument for God's existence hold up?

Eh
Oct 7, 2003 · Replies 25 · Nov 9, 2003

Replies: 25

Graduate Is the WMAP beam profile analysis flawed?

Thomas2
Oct 25, 2003 · Replies 11 · Nov 9, 2003

Replies: 11

Undergrad Sun's activity levels at highest in 1,000 years

Ivan Seeking
Nov 3, 2003 · Replies 11 · Nov 8, 2003

Replies: 11

Graduate Is the Universe's Early Smoothness Questioned by Inflationary Theory?

Glenn
Nov 7, 2003 · Replies 1 · Nov 7, 2003

Replies: 1

Graduate Precision of The Big Bang Theory with John Gibbin's "In the Beginning"

Royce
Sep 11, 2003 · Replies 1 · Nov 7, 2003

Replies: 1

Graduate What are multiple histories and imaginary time in Hawking's cosmology?

Jack
Mar 20, 2003 · Replies 11 · Nov 6, 2003

Replies: 11

In the event of a fullscale alien invasio

Slatiebartfarce
Nov 4, 2003 · Replies 4 · Nov 6, 2003

Replies: 4

Undergrad What's the formula for the Roche limit?

Slatiebartfarce
Nov 5, 2003 · Replies 2 · Nov 6, 2003

Replies: 2

High School Solar flare and coronal mass ejection on October 28, 2003

Ivan Seeking
Oct 28, 2003 · Replies 14 · Nov 6, 2003

Replies: 14

Graduate Is the universe really expanding?

wolram
Oct 8, 2003 · Replies 7 · Nov 5, 2003

Replies: 7

Undergrad What is the anthropic principle and is it science?

think
Nov 5, 2003 · Replies 4 · Nov 5, 2003

Replies: 4

How they find weights of planets?

decibel
Oct 27, 2003 · Replies 6 · Nov 4, 2003

Replies: 6

Graduate If there are 1000 GRBs per day, where is all that energy

wolram
Nov 1, 2003 · Replies 7 · Nov 4, 2003

Replies: 7

Graduate Can the Universe Expand While Matter Converges Under Gravity?

Glenn
Nov 4, 2003 · Replies 2 · Nov 4, 2003

Replies: 2

Graduate Would the concept of empty space exist without depth perception?

Eh
Nov 2, 2003 · Replies 9 · Nov 4, 2003

Replies: 9

Graduate Why do Type Ia supernovae lack hydrogen in their spectra?

Math Is Hard
Oct 30, 2003 · Replies 9 · Nov 4, 2003

Replies: 9

Graduate Origin of Universe: Alternative Theory

anand
Nov 3, 2003 · Replies 1 · Nov 4, 2003

Replies: 1

Undergrad What Causes Blue and Red Shift in Light?

alchemist
Nov 2, 2003 · Replies 1 · Nov 3, 2003

Replies: 1

Graduate What if the strong nuclear force constant were different?

wolram
Oct 29, 2003 · Replies 6 · Nov 3, 2003

Replies: 6

Graduate Does string theory reveal a pattern of nested order and chaos?

Philosophysics
Nov 2, 2003 · Replies 2 · Nov 3, 2003

Replies: 2

Undergrad Gravitational catapult and a spacecraft

mios76
Nov 3, 2003 · Replies 1 · Nov 3, 2003

Replies: 1

Graduate What is the relationship between inflation and dark energy?

alchemist
Nov 2, 2003 · Replies 2 · Nov 2, 2003

Replies: 2

Why Do Some Black Holes Appear Pink?

haynewp
Oct 29, 2003 · Replies 4 · Nov 1, 2003

Replies: 4

Undergrad Does the Earth's Core Wobble Within the Planet Due to the Moon's Orbit?

LURCH
Sep 22, 2003 · Replies 27 · Oct 31, 2003

Replies: 27

Graduate Relativistic redshift and Hubble's law at high redshifts

ranyart
Oct 30, 2003 · Replies 5 · Oct 30, 2003

Replies: 5

Dodecahedral geometry and finite universe models

hawaiidude
Oct 9, 2003 · Replies 8 · Oct 30, 2003

Replies: 8

High School Effects from Oct 28th CME's wont hit Earth for a couple days?

syano
Oct 28, 2003 · Replies 7 · Oct 30, 2003

Replies: 7

High School How many moons does Jupiter have and how were they discovered?

SpaceGuy
Oct 20, 2003 · Replies 5 · Oct 30, 2003

Replies: 5

High School Would Earth's Inhabitants Notice if It Suddenly Stopped Moving?

scifiman
Sep 23, 2003 · Replies 11 · Oct 29, 2003

Replies: 11

High School What would happen if an astroid did hit earth

decibel
Oct 28, 2003 · Replies 2 · Oct 29, 2003

Replies: 2

Graduate Is Space/Matter a Unified Continuum in Cosmology?

Poorichard2
Oct 27, 2003 · Replies 4 · Oct 29, 2003

Replies: 4

Graduate How Do Gravity Waves Form from Space-Time Oscillations?

wolram
Oct 28, 2003 · Replies 4 · Oct 29, 2003

Replies: 4

Undergrad What happens when a smaller black hole falls into a larger one?

jimmy p
Oct 26, 2003 · Replies 11 · Oct 28, 2003

Replies: 11

Graduate Dark matter detected? (1 Oct. preprint)

marcus
Oct 1, 2003 · Replies 14 · Oct 28, 2003

Replies: 14

High School Maths and the infinite universe.

MathematicalPhysicist
Oct 27, 2003 · Replies 7 · Oct 28, 2003

Replies: 7

Undergrad What Are the Potential Consequences of Not Finding Gravity Waves?

wolram
Oct 20, 2003 · Replies 13 · Oct 27, 2003

Replies: 13

Graduate Can A Black Hole End The Universe?

HIGHLYTOXIC
Oct 23, 2003 · Replies 8 · Oct 26, 2003

Replies: 8

Long-lost near-Earth asteroid spotted: New Scientist

Ivan Seeking
Oct 17, 2003 · Replies 6 · Oct 25, 2003

Replies: 6

Dark spot on Jupiter observed in October 2003

Ivan Seeking
Oct 24, 2003 · Replies 5 · Oct 24, 2003

Replies: 5

Undergrad Do orbiting bodies describe ellipses because their orbital centers move?

zoobyshoe
Oct 23, 2003 · Replies 11 · Oct 24, 2003

Replies: 11

Graduate Can Gravitational Differential Explain Celestial Rotational Energies?

scott_sieger
Oct 17, 2003 · Replies 4 · Oct 24, 2003

Replies: 4

Undergrad Gamma Rays Origin: NASA, UMich, DOE Labs Confirm Death of Massive Star

wolram
Oct 18, 2003 · Replies 3 · Oct 23, 2003

Replies: 3

Undergrad How sensitive is Earth's climate to small orbital distance changes?

scott_sieger
Oct 20, 2003 · Replies 25 · Oct 21, 2003

Replies: 25

Graduate Can a black hole hold an infinte ammount of mass

Zeke
Oct 20, 2003 · Replies 4 · Oct 21, 2003

Replies: 4

Graduate If a body is heated its gravity will increase

wolram
Oct 16, 2003 · Replies 11 · Oct 21, 2003

Replies: 11

Graduate A universe infinite in size and matter

bluegoblin
Oct 19, 2003 · Replies 23 · Oct 20, 2003

Replies: 23

Undergrad What keeps stars from colliding with each other?

scott_sieger
Oct 12, 2003 · Replies 25 · Oct 20, 2003

Replies: 25

China's first human space mission

Dissident Dan
Oct 15, 2003 · Replies 54 · Oct 20, 2003

2

Replies: 54

Graduate Did Primordial Black Holes evaporate?

nightbat
Sep 24, 2003 · Replies 18 · Oct 19, 2003

Replies: 18

Undergrad Why do Uranus and Pluto have retrograde rotations?

scott_sieger
Oct 17, 2003 · Replies 19 · Oct 19, 2003

Replies: 19

Graduate Dark Matter as primordial Black Holes in extended Halos

Leo
Oct 16, 2003 · Replies 7 · Oct 19, 2003

Replies: 7

Graduate The Not So Ultimate Theory of Black Holes that are caused by BEC

jammieg
Oct 19, 2003 · Replies 1 · Oct 19, 2003

Replies: 1

High School Why does the Earth rotate as it orbits the sun?

scott_sieger
Oct 15, 2003 · Replies 6 · Oct 18, 2003

Replies: 6

China to launch a man into space on Oct 10th?

SpaceGuy
Aug 15, 2003 · Replies 10 · Oct 17, 2003

Replies: 10

High School Is Jupiter's Giant Red Spot Caused by the Coriolis Effect?

zoobyshoe
Oct 10, 2003 · Replies 14 · Oct 17, 2003

Replies: 14

Undergrad How many supernovae occur in the universe per year?

wolram
Oct 11, 2003 · Replies 14 · Oct 17, 2003

Replies: 14

High School Finding gravitational acceleration from the equation mv²/r = GmM/r²

hawaiidude
Oct 17, 2003 · Replies 2 · Oct 17, 2003

Replies: 2

High School Does Planet Weight Depend on Speed and Gravity?

chetan
Oct 13, 2003 · Replies 11 · Oct 17, 2003

Replies: 11

High School How Do Planets Influence Each Other?

chetan
Oct 15, 2003 · Replies 3 · Oct 17, 2003

Replies: 3

Graduate Is there a solution to the Precession-Time Paradox?

MathematicalPhysicist
Oct 8, 2003 · Replies 7 · Oct 17, 2003

Replies: 7

Undergrad How does a boomerang behave in empty space and gravity?

raaaid
Oct 15, 2003 · Replies 6 · Oct 16, 2003

Replies: 6

Graduate What Existed Before the Big Bang?

Zeke
Oct 15, 2003 · Replies 3 · Oct 15, 2003

Replies: 3

Graduate Microlensing might detect planets as well as MACHOs

marcus
Oct 13, 2003 · Replies 1 · Oct 15, 2003

Replies: 1

Undergrad Why don't massive white dwarfs become black holes?

Astrophysics
Sep 21, 2003 · Replies 31 · Oct 15, 2003

2

Replies: 31

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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