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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 Expanding Universe: Cosmologists Observations & Questions

Apr 27, 2007 · Replies 34 · May 2, 2007

2

Replies: 34

Views: 6K

Undergrad Dark Matter: Info and Math Equations

Apr 30, 2007 · Replies 3 · May 2, 2007

Replies: 3

Views: 2K

Graduate Can I Ignite a Star with 1.1 kg of Mass?

Apr 24, 2007 · Replies 6 · May 1, 2007

Replies: 6

Views: 4K

Graduate How to Calculate the Readout Noise of a CCD?

Apr 29, 2007 · Replies 1 · May 1, 2007

Replies: 1

Views: 6K

Most earthlike exoplanet yet (ESO team 23 April)

Apr 24, 2007 · Replies 17 · Apr 30, 2007

Replies: 17

Views: 4K

Undergrad Atmospheric Refraction vs Height

Apr 28, 2007 · Replies 4 · Apr 30, 2007

Replies: 4

Views: 3K

Graduate Where Did the Energy from Early Universe Radiation Go?

Apr 26, 2007 · Replies 7 · Apr 30, 2007

Replies: 7

Views: 3K

Graduate Scale Factor Ratio: Z Value at End of Inflationary Era

Apr 27, 2007 · Replies 10 · Apr 30, 2007

Replies: 10

Views: 10K

Graduate Could a Spinning Star Defy Gravitational Collapse?

Apr 25, 2007 · Replies 6 · Apr 29, 2007

Replies: 6

Views: 3K

Graduate Gravitons and Photons: Engineer's Questions

Apr 26, 2007 · Replies 9 · Apr 29, 2007

Replies: 9

Views: 4K

Graduate Gravitational Redshift Contribution to Quasar Redshift: Explaining Hubbles Law

Apr 24, 2007 · Replies 10 · Apr 28, 2007

Replies: 10

Views: 6K

Graduate Why the universe is not a black hole (merged)

Apr 23, 2007 · Replies 9 · Apr 28, 2007

Replies: 9

Views: 4K

Graduate Is Self Creation Cosmology a Viable Alternative to the Standard Model?

Jul 19, 2005 · Replies 127 · Apr 28, 2007

5

Replies: 127

Views: 29K

What Makes the Crab Nebula One of the Most Dynamic Objects in the Universe?

Apr 27, 2007 · Replies 1 · Apr 27, 2007

Replies: 1

Views: 2K

Graduate Polarization of Light: Astrophysical Processes & Mechanisms

Apr 10, 2007 · Replies 3 · Apr 27, 2007

Replies: 3

Views: 3K

Wikisky.org - beautiful views of the universe

Apr 27, 2007 · Replies 2 · Apr 27, 2007

Replies: 2

Views: 4K

High School Size of the Universe Speech Help

Apr 19, 2007 · Replies 7 · Apr 26, 2007

Replies: 7

Views: 6K

Is Dark Matter the Key to Solving Galactic Mysteries?

Feb 22, 2006 · Replies 7 · Apr 25, 2007

Replies: 7

Views: 4K

Graduate Where is the Cosmological Event Horizon in the LCDM model?

Apr 24, 2007 · Replies 4 · Apr 25, 2007

Replies: 4

Views: 7K

Graduate E=MC2 vs The End: Can Energy Ever Truly Be Destroyed?

Apr 23, 2007 · Replies 7 · Apr 24, 2007

Replies: 7

Views: 3K

Graduate What expands if there's no rubber?

Apr 22, 2007 · Replies 12 · Apr 24, 2007

Replies: 12

Views: 5K

Graduate If two white-dwarf stars combined together,there will be supernova?which type?-

Apr 23, 2007 · Replies 7 · Apr 24, 2007

Replies: 7

Views: 4K

High School How Can a Beginner Start Learning Astrophysics and What Math is Required?

Apr 23, 2007 · Replies 15 · Apr 24, 2007

Replies: 15

Views: 6K

Undergrad Could computer simulations lead to discovering new laws of the universe?

Apr 23, 2007 · Replies 4 · Apr 24, 2007

Replies: 4

Views: 3K

Number of Observed Galaxies | Glynis' Question

Apr 22, 2007 · Replies 10 · Apr 24, 2007

Replies: 10

Views: 6K

Undergrad Space Travel Possible? Avoiding Collisions & Risks

Apr 2, 2007 · Replies 10 · Apr 24, 2007

Replies: 10

Views: 4K

Graduate Discovering Dark Energy and Dark Matter in a Single Galaxy

Apr 17, 2007 · Replies 17 · Apr 24, 2007

Replies: 17

Views: 6K

Graduate Uncovering the Mysteries of the Sun and its Relationship with Earth

Apr 23, 2007 · Replies 8 · Apr 24, 2007

Replies: 8

Views: 3K

Graduate Atmospheric Absorption of Starlight

Apr 23, 2007 · Replies 1 · Apr 23, 2007

Replies: 1

Views: 3K

Graduate How can we see the cosmic background radiation?

Apr 19, 2007 · Replies 5 · Apr 23, 2007

Replies: 5

Views: 8K

High School Origin of Radio Waves: An Explanation

Apr 22, 2007 · Replies 1 · Apr 22, 2007

Replies: 1

Views: 5K

Graduate Does the Coupling Between Space and Matter Affect the Expansion of Our Universe?

Apr 21, 2007 · Replies 3 · Apr 22, 2007

Replies: 3

Views: 2K

High School Why Did NASA Rename Its Astrophysics Division to Universe?

Apr 22, 2007 · Replies 1 · Apr 22, 2007

Replies: 1

Views: 2K

Graduate Ekpyrotic Model: Explaining Big Bang Before It Happened

Apr 17, 2007 · Replies 4 · Apr 22, 2007

Replies: 4

Views: 5K

Graduate Can dark energy be explained by superconductors?

Apr 20, 2007 · Replies 1 · Apr 20, 2007

Replies: 1

Views: 2K

Graduate Humans can maybe create a universe

Mar 20, 2007 · Replies 22 · Apr 20, 2007

Replies: 22

Views: 10K

High School Why is a Comet More Dangerous Than an Asteroid?

Apr 10, 2007 · Replies 15 · Apr 19, 2007

Replies: 15

Views: 7K

Undergrad Inflation (The evolution of the Universe)

Feb 3, 2007 · Replies 12 · Apr 19, 2007

Replies: 12

Views: 5K

Undergrad OK. So was the Big Bang the beginning or not?

Apr 5, 2007 · Replies 16 · Apr 19, 2007

Replies: 16

Views: 5K

Graduate Sad disconnect at Cosmic Variance blog-how not to discuss

Apr 2, 2007 · Replies 9 · Apr 19, 2007

Replies: 9

Views: 4K

Graduate Why Is LCDM Preferred Over VSL in Modern Cosmology?

Apr 18, 2007 · Replies 3 · Apr 18, 2007

Replies: 3

Views: 3K

High School Debating Jupiter's Planet Status: Is It Just a Giant Bubble of Gas?

Apr 10, 2007 · Replies 14 · Apr 18, 2007

Replies: 14

Views: 20K

Help with Strange Photos of the Sun

Apr 18, 2007 · Replies 1 · Apr 18, 2007

Replies: 1

Views: 3K

Graduate Can naked singularity actually move the space craft in PAST?

Apr 15, 2007 · Replies 12 · Apr 17, 2007

Replies: 12

Views: 5K

High School Hexagon on Saturn: NASA Investigates

Apr 14, 2007 · Replies 1 · Apr 17, 2007

Replies: 1

Views: 4K

Undergrad What was the true significance of Roemer's measurement of the speed of light?

Apr 11, 2007 · Replies 6 · Apr 17, 2007

Replies: 6

Views: 7K

Graduate Estimating the ratio of flux of sunlight to moonlight (at full moon)

Apr 17, 2007 · Replies 2 · Apr 17, 2007

Replies: 2

Views: 10K

Graduate Velocity of rotation at the edge of the Galaxies

Apr 15, 2007 · Replies 5 · Apr 17, 2007

Replies: 5

Views: 3K

Undergrad Absolute Magnitudes for Cepheids

Apr 15, 2007 · Replies 2 · Apr 16, 2007

Replies: 2

Views: 3K

Graduate Where Did the Electrons Come From in Big Bang Nucleosynthesis?

Mar 1, 2007 · Replies 4 · Apr 16, 2007

Replies: 4

Views: 3K

Graduate Is Empty Space Beyond the Universe Influencing Its Expansion?

Mar 30, 2007 · Replies 36 · Apr 16, 2007

2

Replies: 36

Views: 12K

Chris Hillman plaintalk summary of today's GPB announcement

Apr 15, 2007 · Replies 1 · Apr 15, 2007

Replies: 1

Views: 2K

Graduate Radiative equilibrium in near-Earth space

Apr 13, 2007 · Replies 2 · Apr 14, 2007

Replies: 2

Views: 3K

High School Comet Decay: Understanding the Forces Impacting It

Apr 14, 2007 · Replies 1 · Apr 14, 2007

Replies: 1

Views: 3K

Graduate How Did Quantum Fluctuations Initiate the Big Bang?

Apr 2, 2007 · Replies 7 · Apr 13, 2007

Replies: 7

Views: 5K

Graduate What Are the Latest Insights on Spiral Galaxy Formation Theories?

Apr 11, 2007 · Replies 3 · Apr 13, 2007

Replies: 3

Views: 3K

Graduate Where are the Rules of the Universe Stored?

Jan 24, 2007 · Replies 45 · Apr 12, 2007

2

Replies: 45

Views: 7K

Undergrad How does dark matter clump together?

Apr 7, 2007 · Replies 10 · Apr 12, 2007

Replies: 10

Views: 3K

Graduate Why Is Heat Distribution Unequal in the Expanding Universe?

Apr 10, 2007 · Replies 3 · Apr 12, 2007

Replies: 3

Views: 2K

Mysterious Orange Light in the Sky

Apr 9, 2007 · Replies 4 · Apr 12, 2007

Replies: 4

Views: 4K

Graduate What is the Ultimate Source of Energy in the Universe?

Nov 19, 2006 · Replies 37 · Apr 12, 2007

2

Replies: 37

Views: 8K

Graduate Further looks bigger beyond z = 1.6

Apr 5, 2007 · Replies 6 · Apr 10, 2007

Replies: 6

Views: 4K

Graduate What Insights Can We Gain from M87's Jet Observations?

Apr 10, 2007 · Replies 1 · Apr 10, 2007

Replies: 1

Views: 3K

Graduate Do Exotic Matter Stars Exist? New Study Offers Insights

Apr 9, 2007 · Replies 1 · Apr 10, 2007

Replies: 1

Views: 3K

Undergrad Can Mars Effect the Asteroid Belt?

Apr 10, 2007 · Replies 1 · Apr 10, 2007

Replies: 1

Views: 4K

Graduate Could gravity's strength also require denisty as an alternative to MOND

Apr 9, 2007 · Replies 1 · Apr 9, 2007

Replies: 1

Views: 2K

Graduate Calculating the redshift at which radiation energy density equaled mass density

Apr 3, 2007 · Replies 4 · Apr 9, 2007

Replies: 4

Views: 29K

Graduate Imaginary Engine: Dark Matter & Super Symmetry Needed

Apr 7, 2007 · Replies 2 · Apr 7, 2007

Replies: 2

Views: 2K

High School The Universe's Scale: Galaxies, Stars, and Beyond

Apr 7, 2007 · Replies 3 · Apr 7, 2007

Replies: 3

Views: 3K

Graduate The Science of the Universe: Best Papers and Testable Results

Apr 5, 2007 · Replies 1 · Apr 7, 2007

Replies: 1

Views: 4K

What Does the NYtimes Reveal About Dark Matter and Energy?

Mar 12, 2007 · Replies 2 · Apr 7, 2007

Replies: 2

Views: 3K

Graduate What Were the Early Theories on the Accelerating Universe?

Mar 31, 2007 · Replies 9 · Apr 7, 2007

Replies: 9

Views: 3K

Graduate A third dimensional object has length, width and height

Mar 20, 2007 · Replies 5 · Apr 7, 2007

Replies: 5

Views: 4K

Graduate Superluminal recession speed is common

Apr 5, 2007 · Replies 16 · Apr 7, 2007

Replies: 16

Views: 7K

Graduate What Was the Universe Before Big Bang?

Mar 30, 2007 · Replies 20 · Apr 6, 2007

Replies: 20

Views: 6K

Graduate Moon slingshot powered atmosphere scoop?

Apr 3, 2007 · Replies 4 · Apr 6, 2007

Replies: 4

Views: 5K

Graduate Redshift Anomaly: Progress & Confusion

Mar 20, 2007 · Replies 5 · Apr 6, 2007

Replies: 5

Views: 5K

Graduate Paralell Universes - SA special report

Apr 3, 2007 · Replies 5 · Apr 5, 2007

Replies: 5

Views: 3K

Graduate Violation of Universal Speed Limit

Apr 3, 2007 · Replies 3 · Apr 5, 2007

Replies: 3

Views: 4K

Graduate Are There Galaxies Whose Light Will Never Reach Us Due to Universe Expansion?

Apr 3, 2007 · Replies 9 · Apr 5, 2007

Replies: 9

Views: 5K

Graduate What Existed Before the Big Bang?

Apr 4, 2007 · Replies 1 · Apr 4, 2007

Replies: 1

Views: 2K

Size and Destiny of the Universe -nice JPG file

Apr 1, 2007 · Replies 11 · Apr 3, 2007

Replies: 11

Views: 4K

Graduate Are Null Points Present Between Galaxies on a Collision Course?

Apr 3, 2007 · Replies 2 · Apr 3, 2007

Replies: 2

Views: 3K

Graduate Problem with an infinite universe

Apr 2, 2007 · Replies 11 · Apr 2, 2007

Replies: 11

Views: 6K

Graduate The universe may not be expanding

Feb 18, 2007 · Replies 8 · Apr 2, 2007

Replies: 8

Views: 4K

Graduate What is Degeneracy of Dark Matter?

Apr 2, 2007 · Replies 3 · Apr 2, 2007

Replies: 3

Views: 3K

Graduate Could Sirius A/B Trigger a Supernova?

Mar 22, 2007 · Replies 4 · Apr 2, 2007

Replies: 4

Views: 14K

Graduate Unusual object I saw in sky in Boston area

Mar 31, 2007 · Replies 5 · Apr 1, 2007

Replies: 5

Views: 4K

Graduate Matter-antimatter basis for dark energy

Apr 1, 2007 · Replies 4 · Apr 1, 2007

Replies: 4

Views: 3K

Graduate An expanding universe, part of a bigger leading edge?

Mar 30, 2007 · Replies 25 · Apr 1, 2007

Replies: 25

Views: 6K

High School Does blackhole have strong magnetic field?

Mar 24, 2007 · Replies 2 · Mar 31, 2007

Replies: 2

Views: 11K

Graduate Uncovering the Optimal Epoch for Life in the Universe

Mar 29, 2007 · Replies 5 · Mar 30, 2007

Replies: 5

Views: 2K

I have a question for everyone here

Mar 25, 2007 · Replies 19 · Mar 30, 2007

Replies: 19

Views: 4K

Graduate Something majorly wrong with this paper?

Mar 29, 2007 · Replies 2 · Mar 30, 2007

Replies: 2

Views: 2K

High School What is at the center of the universe?

Mar 25, 2007 · Replies 46 · Mar 29, 2007

2

Replies: 46

Views: 39K

Graduate CMBR - a possible alternative explanation?

Mar 28, 2007 · Replies 15 · Mar 29, 2007

Replies: 15

Views: 8K

Graduate What is the relationship between gravity and dark matter in the universe?

Mar 22, 2007 · Replies 5 · Mar 29, 2007

Replies: 5

Views: 4K

Graduate Got a link for the angular-size redshift relation?

Jul 31, 2006 · Replies 12 · Mar 29, 2007

Replies: 12

Views: 7K

Graduate Does Mass and Energy Affect the Path of Light Differently in General Relativity?

Mar 25, 2007 · Replies 14 · Mar 29, 2007

Replies: 14

Views: 4K

Graduate Heard anything about GPB results?

Jul 24, 2006 · Replies 11 · Mar 28, 2007

Replies: 11

Views: 5K

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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