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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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Undergrad Kepler's Laws and altitude of orbit

Ellimist
Sep 22, 2004 · Replies 28 · Dec 2, 2004

Replies: 28

How many papers on arXiv get published

cosmoboy
Dec 1, 2004 · Replies 1 · Dec 2, 2004

Replies: 1

Graduate What Are the Margins of Error in Calculating the Cosmologic Constant?

wolram
Dec 2, 2004 · Replies 1 · Dec 2, 2004

Replies: 1

High School Relative Gravity: How Size Affects Force of Gravity

DB
Dec 1, 2004 · Replies 3 · Dec 1, 2004

Replies: 3

Undergrad Formation of Black Holes from Neutron Stars and White Dwarfs

alchemist
May 29, 2004 · Replies 46 · Dec 1, 2004

2

Replies: 46

Stargazing New Scientist Article - Pendulums + Solar Eclipse

davidmerritt
Nov 29, 2004 · Replies 7 · Dec 1, 2004

Replies: 7

Graduate Why Do We Seek a Universe Born from 'Almost Nothing'?

wolram
Nov 25, 2004 · Replies 43 · Nov 30, 2004

2

Replies: 43

Graduate Unraveling the Mystery of Hyperbolic Trajectories

Orion1
Nov 23, 2004 · Replies 4 · Nov 30, 2004

Replies: 4

Undergrad How does Hubble's law relate to accelerating universe theories?

Cosmo16
Oct 29, 2004 · Replies 7 · Nov 30, 2004

Replies: 7

Stargazing Saturn using ETX-105 and a QuickCam 4000

russ_watters
Nov 26, 2004 · Replies 4 · Nov 29, 2004

Replies: 4

Undergrad Why does the Sun produce a continuous spectrum if it's 99% hydrogen and helium?

smithpa9
Nov 28, 2004 · Replies 16 · Nov 29, 2004

Replies: 16

Moon shining through a perfectly circular opening in the clouds

relativelyslow
Nov 23, 2004 · Replies 8 · Nov 26, 2004

Replies: 8

Undergrad Can Distant Stars Fill the Universe with Photons?

Burnsys
Nov 24, 2004 · Replies 10 · Nov 25, 2004

Replies: 10

Undergrad How Can I Effectively Investigate Meteor Impact Crater Formation?

AstroCook
Oct 21, 2004 · Replies 8 · Nov 24, 2004

Replies: 8

Are Manned Missions Still Necessary for Space Exploration?

xecute
Nov 23, 2004 · Replies 2 · Nov 24, 2004

Replies: 2

High School How do we photograph the sun without it appearing as pure bright light?

DB
Nov 21, 2004 · Replies 6 · Nov 24, 2004

Replies: 6

High School Finding asteroid data for impact simulation project

jsmit20
Nov 19, 2004 · Replies 4 · Nov 24, 2004

Replies: 4

Graduate What recent research and proposals are active in astronomy and cosmology?

UrbanXrisis
Nov 6, 2004 · Replies 16 · Nov 24, 2004

Replies: 16

Graduate Maximum radial velocity in a hyperbolic orbit

Machinus
Nov 19, 2004 · Replies 20 · Nov 23, 2004

Replies: 20

Graduate Universe be described with mass imbedded in space-time?

Jonny_trigonometry
Oct 28, 2004 · Replies 5 · Nov 23, 2004

Replies: 5

High School Deja vu is a ripple in space-time

jlorino
Oct 26, 2004 · Replies 5 · Nov 23, 2004

Replies: 5

Graduate Supernova and GRB connection paper

Chronos
Oct 24, 2004 · Replies 25 · Nov 23, 2004

Replies: 25

Graduate What is the role of life in the universe?

Vast
Nov 14, 2004 · Replies 62 · Nov 23, 2004

3

Replies: 62

Undergrad Best way to get 'learn' Astrophysics

Physik
Nov 23, 2004 · Replies 1 · Nov 23, 2004

Replies: 1

Graduate Scale factor in Robertson-Walker metric

Mike2
Nov 18, 2004 · Replies 19 · Nov 23, 2004

Replies: 19

Graduate Galaxy found at redshift 10 challenges early universe models

wolram
Apr 9, 2004 · Replies 17 · Nov 23, 2004

Replies: 17

Undergrad Star Cluster Gravity: Impact on Forces

DB
Nov 21, 2004 · Replies 4 · Nov 22, 2004

Replies: 4

Graduate Do Black Holes Really Emit Radiation?

Chronos
Nov 13, 2004 · Replies 6 · Nov 22, 2004

Replies: 6

Graduate What caused the universe to compress before the big bang?

abitofnothingleft
Nov 5, 2004 · Replies 40 · Nov 22, 2004

2

Replies: 40

Stargazing What is the Soligor 8in telescope like?

EIRE2003
Nov 20, 2004 · Replies 1 · Nov 21, 2004

Replies: 1

Graduate Curvature of Space - Is it Still Relevant in Modern Physics?

DaveC426913
Nov 17, 2004 · Replies 7 · Nov 21, 2004

Replies: 7

High School Make Sense of our Solar System's Place in the Universe

DB
Nov 20, 2004 · Replies 2 · Nov 21, 2004

Replies: 2

Graduate Do black holes reduce the mass of objects they consume?

Physik
Nov 20, 2004 · Replies 5 · Nov 21, 2004

Replies: 5

Graduate What Is the Universe Expanding Into?

Wol377
Nov 14, 2004 · Replies 5 · Nov 20, 2004

Replies: 5

Graduate What shall we call this class of star?

Phobos
Oct 6, 2004 · Replies 8 · Nov 19, 2004

Replies: 8

Graduate Losing mass, gravity, curved space, and more

gonzo
Nov 18, 2004 · Replies 8 · Nov 19, 2004

Replies: 8

Graduate How Does Delta_k Transform in a Uniformly Moving Frame in Fourier Space?

cosmoboy
Nov 18, 2004 · Replies 2 · Nov 18, 2004

Replies: 2

Graduate How Was Thermal Equilibrium Achieved After Inflation?

hellfire
Nov 17, 2004 · Replies 7 · Nov 18, 2004

Replies: 7

Undergrad Calculating spacecraft altitude after orbital maneuver from 300 km orbit

chilli_pepper
Nov 16, 2004 · Replies 4 · Nov 17, 2004

Replies: 4

Stargazing I'm looking to buy a telescope pretty soon

sporff
Nov 16, 2004 · Replies 8 · Nov 17, 2004

Replies: 8

High School Did the Big Bang start from nothing, and can atoms randomly appear?

Mwyn
Nov 14, 2004 · Replies 15 · Nov 17, 2004

Replies: 15

High School How Would Life Change Without the Moon's Gravity?

AnthreX
Nov 16, 2004 · Replies 5 · Nov 17, 2004

Replies: 5

Graduate Can Higher Order Curvature Theories of Gravity Solve the Dark Matter Puzzle?

Chronos
Nov 9, 2004 · Replies 43 · Nov 17, 2004

2

Replies: 43

Graduate What happens as a neutron star collapses into a black hole

brian0918
Nov 16, 2004 · Replies 9 · Nov 17, 2004

Replies: 9

Graduate What is the mathematical explanation for the shepherd moons of Saturn?

ShadowHound
Nov 15, 2004 · Replies 2 · Nov 17, 2004

Replies: 2

Undergrad Do black holes have finite or infinite mass?

Ryosuke
Nov 14, 2004 · Replies 11 · Nov 16, 2004

Replies: 11

Undergrad Is Earth Headed for a Dinosaur-Like Extinction?

Mr.E Man
Oct 28, 2003 · Replies 6 · Nov 16, 2004

Replies: 6

Where can I find information about star positions in the night sky?

Leonidas
Nov 14, 2004 · Replies 4 · Nov 15, 2004

Replies: 4

High School Did the Big Bang happen all in one place?

jfh_dragonfly
Nov 12, 2004 · Replies 3 · Nov 15, 2004

Replies: 3

Graduate Theoretical Extinguishing of the Sun with water

Mister Nonsense
Oct 8, 2004 · Replies 10 · Nov 15, 2004

Replies: 10

Graduate Mach space in The Fabric of the Cosmos

nightcleaner
Nov 7, 2004 · Replies 16 · Nov 14, 2004

Replies: 16

Undergrad Universe is expanding faster than the speed of light

Matrixman13
Nov 13, 2004 · Replies 2 · Nov 13, 2004

Replies: 2

High School Prove that 1 parsec = 3.26 light years?

Link
Nov 13, 2004 · Replies 1 · Nov 13, 2004

Replies: 1

Graduate Doppler effect distinguish whether the red/blue shift

serali
Oct 8, 2004 · Replies 24 · Nov 13, 2004

Replies: 24

Graduate Where Can I Find a Detailed Graph of Potential vs. Radius for All Orbits?

Machinus
Nov 12, 2004 · Replies 1 · Nov 13, 2004

Replies: 1

Graduate Are We Already on the Edge of the Universe?

RandallB
Nov 11, 2004 · Replies 7 · Nov 12, 2004

Replies: 7

Graduate Should I Change My PhD Program Due to Poor Supervision in Cosmology?

cosmoboy
Nov 10, 2004 · Replies 8 · Nov 12, 2004

Replies: 8

Graduate Will the asteroids eventually (re)form a 10th planet?

Loren Booda
Oct 22, 2004 · Replies 4 · Nov 11, 2004

Replies: 4

Graduate Reanalysis challenging the z = 10 galaxy claim by Roser Pello

marcus
Jul 7, 2004 · Replies 10 · Nov 11, 2004

Replies: 10

Undergrad Locating pulsar CP1133 from 1972 catalogs

Creator
Nov 9, 2004 · Replies 3 · Nov 10, 2004

Replies: 3

Graduate Could a Neutron Star Be at the Centre of the Sun?

Garth
Nov 9, 2004 · Replies 4 · Nov 10, 2004

Replies: 4

When will the Cosmos 1 solar sail spacecraft be launched?

Phobos
Nov 10, 2004 · Replies 1 · Nov 10, 2004

Replies: 1

High School Can a Planet Really Be Destroyed Like in Star Wars?

darkar
Nov 5, 2004 · Replies 10 · Nov 9, 2004

Replies: 10

Stargazing Astrophotography with a 60mm refractor and QuickCam

russ_watters
Nov 4, 2004 · Replies 4 · Nov 8, 2004

Replies: 4

Undergrad How Do Objects Move Near the Galactic Center?

Slag
Mar 5, 2004 · Replies 21 · Nov 8, 2004

Replies: 21

Undergrad How can I start studying astrophysics without a physics degree?

tintinhz
Nov 8, 2004 · Replies 1 · Nov 8, 2004

Replies: 1

Graduate How to match N-body simulation box size to physical scales

cosmoboy
Nov 7, 2004 · Replies 2 · Nov 7, 2004

Replies: 2

Graduate Newly revised paper on zero point energy and cosmological constant

turbo
Oct 23, 2004 · Replies 46 · Nov 7, 2004

2

Replies: 46

Graduate The Physics of CMBR Anisotropies

meteor
Nov 3, 2004 · Replies 8 · Nov 6, 2004

Replies: 8

Undergrad Explain to me the concept of space time?

fizzzzzzzzzzzy
Nov 4, 2004 · Replies 3 · Nov 6, 2004

Replies: 3

High School What is dark energy and what is the evidence for it?

The_Thinker
Oct 30, 2004 · Replies 11 · Nov 5, 2004

Replies: 11

Graduate Super G string theory and its claims

cosmoboy
Nov 4, 2004 · Replies 2 · Nov 5, 2004

Replies: 2

Graduate What is the structure of black holes?

hispanic panic
Nov 3, 2004 · Replies 2 · Nov 5, 2004

Replies: 2

Graduate How to derive angular resolution from bolometric flux, spectral type and temperature

stuffy
Nov 3, 2004 · Replies 2 · Nov 4, 2004

Replies: 2

Undergrad Movie of stars orbiting a black hole

marcus
Oct 12, 2004 · Replies 3 · Nov 4, 2004

Replies: 3

Graduate A rock, the earth, an ellipse and the joys of angular momentum

BigRedRod
Oct 31, 2004 · Replies 3 · Nov 3, 2004

Replies: 3

Graduate How does curved spacetime pull objects if space is empty?

ajmalhamza
Oct 21, 2004 · Replies 4 · Nov 2, 2004

Replies: 4

Undergrad How do you calculate the mass of a black hole like Cygnus X-1?

tntcoder
Oct 31, 2004 · Replies 7 · Nov 1, 2004

Replies: 7

Graduate Really exceeding the speed of light?

Darwin
Oct 31, 2004 · Replies 6 · Nov 1, 2004

Replies: 6

Graduate Fractional abundance of HI, HII, H- and e- in the photosphere

goleafsgo113
Oct 31, 2004 · Replies 1 · Nov 1, 2004

Replies: 1

Graduate Large scale structure formation and nonlinearity onset

hellfire
Sep 20, 2004 · Replies 5 · Nov 1, 2004

Replies: 5

Graduate What is the original purpose of the Laplace-Runge Lenz vector?

BobG
Jul 16, 2004 · Replies 5 · Oct 31, 2004

Replies: 5

What's Up with Titan's Unusual Clouds?

Cosmo16
Oct 29, 2004 · Replies 2 · Oct 30, 2004

Replies: 2

I believe universe was created by God

jasonparker
Oct 29, 2004 · Replies 1 · Oct 29, 2004

Replies: 1

Stargazing Lunar eclipse during Red Sox World Series game and astrology claims

Phobos
Oct 29, 2004 · Replies 3 · Oct 29, 2004

Replies: 3

High School What is Sean Carroll's Cosmology Primer?

marcus
Oct 25, 2004 · Replies 12 · Oct 29, 2004

Replies: 12

Graduate The effect of curveture on space-time

Blissfulpain
Oct 28, 2004 · Replies 1 · Oct 29, 2004

Replies: 1

Undergrad Grav Sling Shot: Understanding Inelastic Collisions w/o Contact Forces

Phymath
Oct 28, 2004 · Replies 1 · Oct 28, 2004

Replies: 1

Stargazing October 27, 2004 total lunar eclipse visible from multiple continents

marcus
Oct 27, 2004 · Replies 6 · Oct 28, 2004

Replies: 6

Graduate Is a Cosmological Constant necessary to explain the Universe's expansion rate?

Twistedseer
Oct 23, 2004 · Replies 17 · Oct 28, 2004

Replies: 17

Closest image of Titan shows atmosphere and surface features

marcus
Oct 27, 2004 · Replies 3 · Oct 27, 2004

Replies: 3

Graduate My second shallow question - about black hole¬

ThomasJoe40
Oct 26, 2004 · Replies 7 · Oct 27, 2004

Replies: 7

Cassini Titan flyby and Huygens probe descent in December

marcus
Oct 23, 2004 · Replies 5 · Oct 27, 2004

Replies: 5

Graduate What is anti-energy and does it have applications?

caumaan
Dec 20, 2003 · Replies 11 · Oct 27, 2004

Replies: 11

High School Spacecraft traveled into space from Earth

UrbanXrisis
Oct 25, 2004 · Replies 3 · Oct 26, 2004

Replies: 3

Undergrad Who is rotating around whom in the solar system?

bhanukiran
Oct 23, 2004 · Replies 8 · Oct 26, 2004

Replies: 8

Stargazing Telescopes and resolving angles problem

moonman
Oct 25, 2004 · Replies 2 · Oct 25, 2004

Replies: 2

Graduate Dirac,large numbers and cosmology

kurious
Aug 3, 2004 · Replies 11 · Oct 25, 2004

Replies: 11

Graduate What does this new twist in astrophysics reveal?

Wave's_Hand_Particle
Oct 15, 2004 · Replies 11 · Oct 25, 2004

Replies: 11

Graduate Has Frame Dragging Been Scientifically Proven?

Labguy
Oct 24, 2004 · Replies 1 · Oct 24, 2004

Replies: 1

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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