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Astronomy and Astrophysics Forum

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

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

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

Replies: 7

Views: 3K

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

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

Replies: 2

Views: 10K

Graduate Understanding the Effects of Black Holes on Mass and Gravity

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

Replies: 5

Views: 2K

Graduate What Is the Universe Expanding Into?

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

Replies: 5

Views: 5K

Graduate What shall we call this class of star?

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

Replies: 8

Views: 3K

Graduate Losing mass, gravity, curved space, and more

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

Replies: 8

Views: 4K

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

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

Replies: 2

Views: 3K

Graduate How Was Thermal Equilibrium Achieved After Inflation?

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

Replies: 7

Views: 3K

Undergrad Orbital Motion Help: Calculate Altitude of Spacecraft

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

Replies: 4

Views: 4K

Stargazing I'm looking to buy a telescope pretty soon

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

Replies: 8

Views: 3K

High School Big Bang Theory: What We Know So Far

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

Replies: 15

Views: 4K

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

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

Replies: 5

Views: 2K

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

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

2

Replies: 43

Views: 8K

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

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

Replies: 9

Views: 10K

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

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

Replies: 2

Views: 3K

Undergrad Unraveling the Mysteries of Black Holes: Finite or Infinite Mass?

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

Replies: 11

Views: 4K

Learn the Night Sky: Star Placement & Familiarization

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

Replies: 4

Views: 2K

High School Get Physics Help: Big Bang Explained

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

Replies: 3

Views: 3K

Graduate Theoretical Extinguishing of the Sun with water

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

Replies: 10

Views: 5K

Graduate Mach space in The Fabric of the Cosmos

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

Replies: 16

Views: 4K

Undergrad Universe is expanding faster than the speed of light

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

Replies: 2

Views: 2K

High School Prove that 1 parsec = 3.26 light years?

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

Replies: 1

Views: 4K

Graduate Doppler effect distinguish whether the red/blue shift

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

Replies: 24

Views: 7K

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

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

Replies: 1

Views: 5K

Graduate Are We Already on the Edge of the Universe?

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

Replies: 7

Views: 5K

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

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

Replies: 8

Views: 3K

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

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

Replies: 4

Views: 4K

Graduate Doubts about the z = 10 galaxy of Roser Pello

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

Replies: 10

Views: 4K

Undergrad Need help locating pulsar CP1133

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

Replies: 3

Views: 3K

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

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

Replies: 4

Views: 2K

When will the Cosmos 1 solar sail spacecraft be launched?

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

Replies: 1

Views: 3K

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

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

Replies: 10

Views: 4K

Stargazing QuickCam Astrophotography: Tips for Stunning Night Sky Photos

Nov 4, 2004 · Replies 4 · Nov 8, 2004

Replies: 4

Views: 10K

Undergrad How Do Objects Move Near the Galactic Center?

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

Replies: 21

Views: 6K

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

Nov 8, 2004 · Replies 1 · Nov 8, 2004

Replies: 1

Views: 3K

Graduate What is the Optimal Size for a Cosmological N-Body Simulation Box?

Nov 7, 2004 · Replies 2 · Nov 7, 2004

Replies: 2

Views: 4K

Graduate Newly revised paper on zero point energy and cosmological constant

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

2

Replies: 46

Views: 8K

Graduate The Physics of CMBR Anisotropies

Nov 3, 2004 · Replies 8 · Nov 6, 2004

Replies: 8

Views: 4K

Undergrad Explain to me the concept of space time?

Nov 4, 2004 · Replies 3 · Nov 6, 2004

Replies: 3

Views: 3K

Graduate Super G String Theory: New String Theory Explained

Nov 4, 2004 · Replies 2 · Nov 5, 2004

Replies: 2

Views: 6K

Graduate What is the structure of black holes?

Nov 3, 2004 · Replies 2 · Nov 5, 2004

Replies: 2

Views: 2K

Graduate Deriving Angular Resolution from Bolometric Flux, Spectral Type & Temp

Nov 3, 2004 · Replies 2 · Nov 4, 2004

Replies: 2

Views: 5K

Undergrad Movie of stars orbiting a black hole

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

Replies: 3

Views: 18K

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

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

Replies: 3

Views: 5K

Graduate Can Curved Space Really Kill Me? Understanding the Theories of Relativity

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

Replies: 4

Views: 3K

Undergrad Calculating Mass of a Black Hole: A Primer

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

Replies: 7

Views: 5K

Graduate Really exceeding the speed of light?

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

Replies: 6

Views: 3K

Graduate Calculate Fractional Abundance of HI,HII,H- & e- for Hydrogen

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

Replies: 1

Views: 3K

Graduate Large scale structure formation and nonlinearity onset

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

Replies: 5

Views: 4K

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

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

Replies: 5

Views: 7K

What's Up with Titan's Unusual Clouds?

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

Replies: 2

Views: 2K

Stargazing Red Sox & Lunar Eclipse & astrology

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

Replies: 3

Views: 5K

High School What is Sean Carroll's Cosmology Primer?

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

Replies: 12

Views: 4K

Graduate The effect of curveture on space-time

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

Replies: 1

Views: 2K

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

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

Replies: 1

Views: 2K

Stargazing Total Eclipse Tonight: Visible From Europe, South & North America

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

Replies: 6

Views: 4K

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

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

Replies: 17

Views: 4K

Closest Image of Titan: Atmosphere Revealed

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

Replies: 3

Views: 3K

Graduate My second shallow question - about black hole¬

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

Replies: 7

Views: 3K

Titan Surface Probe: Cassini Flyby & Huygens Descent

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

Replies: 5

Views: 3K

Graduate What is Anti-Energy? Uses & Applications

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

Replies: 11

Views: 6K

High School Spacecraft traveled into space from Earth

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

Replies: 3

Views: 3K

Undergrad Who is rotating around whom in the solar system?

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

Replies: 8

Views: 4K

Stargazing Telescopes and resolving angles problem

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

Replies: 2

Views: 3K

Graduate Dirac,large numbers and cosmology

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

Replies: 11

Views: 4K

Graduate What does this new twist in astrophysics reveal?

Oct 15, 2004 · Replies 11 · Oct 25, 2004

Replies: 11

Views: 3K

Graduate Has Frame Dragging Been Scientifically Proven?

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

Replies: 1

Views: 3K

Graduate Can we rotate 3D objects in 4D space?

Oct 22, 2004 · Replies 9 · Oct 24, 2004

Replies: 9

Views: 6K

Can a microscopic solar system exist?

Oct 20, 2004 · Replies 7 · Oct 24, 2004

Replies: 7

Views: 5K

Undergrad Can planets exist around twin or triple-star systems?

Oct 23, 2004 · Replies 7 · Oct 23, 2004

Replies: 7

Views: 4K

Graduate A possible view of curved space/time?

Sep 29, 2004 · Replies 15 · Oct 23, 2004

Replies: 15

Views: 5K

High School Defining Planets and Moons: Size Matters

Oct 10, 2004 · Replies 14 · Oct 23, 2004

Replies: 14

Views: 8K

Link to Bush v. Kerry debate on the space program

Oct 19, 2004 · Replies 1 · Oct 23, 2004

Replies: 1

Views: 2K

Undergrad Why doesn't the orbit increase in radius?

Oct 8, 2004 · Replies 4 · Oct 23, 2004

Replies: 4

Views: 3K

Graduate Mutual solar-extrasolar orbital foci

Oct 22, 2004 · Replies 2 · Oct 22, 2004

Replies: 2

Views: 5K

Graduate Discover the JNow RA and Dec of L4 and L5 in the Sun/Earth System

Oct 18, 2004 · Replies 2 · Oct 22, 2004

Replies: 2

Views: 3K

High School Understanding Reddening and Its Impact on Light Scattering in Astronomy

Oct 12, 2004 · Replies 11 · Oct 22, 2004

Replies: 11

Views: 4K

Undergrad Is the Universe Curved or Flat and How Does It Affect Energy?

Oct 21, 2004 · Replies 5 · Oct 22, 2004

Replies: 5

Views: 3K

Graduate Why does a spinning black hole's singularity form a ring?

Oct 16, 2004 · Replies 2 · Oct 21, 2004

Replies: 2

Views: 2K

Undergrad Can a Planet Turn into a Star through Gas Accumulation?

Oct 21, 2004 · Replies 1 · Oct 21, 2004

Replies: 1

Views: 12K

Undergrad Space Expansion: Earth-Sun, Nucleus-Electron?

Oct 10, 2004 · Replies 11 · Oct 20, 2004

Replies: 11

Views: 4K

Undergrad Conditions for 2 Elliptical Orbits w/ Same Peri/Aphelion

Oct 19, 2004 · Replies 1 · Oct 19, 2004

Replies: 1

Views: 4K

Graduate Expansion of Universe and fine structure.

Oct 16, 2004 · Replies 15 · Oct 19, 2004

Replies: 15

Views: 4K

Graduate Dear Nereid and Phobos (seat belt on) can we talk about redshifts?

Jun 19, 2004 · Replies 88 · Oct 19, 2004

3

Replies: 88

Views: 18K

Undergrad The Universe is expanding Right?

Sep 8, 2004 · Replies 25 · Oct 19, 2004

Replies: 25

Views: 8K

Graduate Converting State Vectors for Solar System Bodies

Oct 8, 2004 · Replies 3 · Oct 18, 2004

Replies: 3

Views: 5K

Mysterious Green Stars in Patriotic Photos

Sep 7, 2004 · Replies 15 · Oct 17, 2004

Replies: 15

Views: 5K

Graduate The originator of magnetic helicity?

Oct 17, 2004 · Replies 4 · Oct 17, 2004

Replies: 4

Views: 2K

Nature News: Surprising Findings in 2004

Oct 16, 2004 · Replies 3 · Oct 16, 2004

Replies: 3

Views: 3K

Graduate Can Modifying Gravity Solve the Dark Energy Dilemma?

Oct 3, 2004 · Replies 34 · Oct 16, 2004

2

Replies: 34

Views: 5K

Graduate Living in a Closed-Loop Universe?

Oct 4, 2004 · Replies 11 · Oct 16, 2004

Replies: 11

Views: 3K

Graduate Could Twin Planets Be Visible to Each Other in Altered Orbits?

Sep 24, 2004 · Replies 5 · Oct 16, 2004

Replies: 5

Views: 7K

Undergrad What is the value of Mu needed for orbit calculations in the Earth-moon system?

Oct 14, 2004 · Replies 1 · Oct 15, 2004

Replies: 1

Views: 5K

Graduate Is Time Speeding Up in the Expanding Universe?

Oct 15, 2004 · Replies 7 · Oct 15, 2004

Replies: 7

Views: 3K

Undergrad How does velocity affects the shape of orbit

Oct 13, 2004 · Replies 2 · Oct 14, 2004

Replies: 2

Views: 15K

Graduate Could a Hollow Supermassive Black Hole Support Life Inside?

Oct 13, 2004 · Replies 4 · Oct 14, 2004

Replies: 4

Views: 5K

High School Ever seen a full moon in the daytime?

Oct 14, 2004 · Replies 1 · Oct 14, 2004

Replies: 1

Views: 13K

Graduate Multiple connected topology and gravitation

Oct 14, 2004 · Replies 1 · Oct 14, 2004

Replies: 1

Views: 2K

Intelligent Life on Mars: MGS Sighting in Sinus Meridiani

Oct 13, 2004 · Replies 8 · Oct 14, 2004

Replies: 8

Views: 3K

High School Sky Shade Shift: Does Color Change at Latitudes & Altitudes?

Oct 13, 2004 · Replies 4 · Oct 14, 2004

Replies: 4

Views: 4K

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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