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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 Areas of space that we cannot see that also have an effect on expansion?

Jan 7, 2006 · Replies 14 · Jan 16, 2006

Replies: 14

Views: 4K

High School Can Sound Be Heard on Other Planets?

Jan 14, 2006 · Replies 1 · Jan 15, 2006

Replies: 1

Views: 6K

Graduate Can We Observe the Growth of Black Holes and Their Mysterious Processes?

Dec 27, 2005 · Replies 5 · Jan 14, 2006

Replies: 5

Views: 3K

Graduate Analyzing Dark Matter Halos: Isothermal vs NFW Profiles

Jan 9, 2006 · Replies 7 · Jan 14, 2006

Replies: 7

Views: 5K

Graduate Not sure this is the right thread for this?

Jan 10, 2006 · Replies 3 · Jan 14, 2006

Replies: 3

Views: 2K

High School Age & Distance of Stars: Clarifying Light Speed Impact

Jan 10, 2006 · Replies 10 · Jan 13, 2006

Replies: 10

Views: 3K

Graduate What Is the Shape of the Universe?

Jan 12, 2006 · Replies 6 · Jan 13, 2006

Replies: 6

Views: 5K

High School Trapezium in orion was a very strange quadruple star

Jan 11, 2006 · Replies 2 · Jan 12, 2006

Replies: 2

Views: 3K

Three cheers and two years for the Mars rovers

Jan 10, 2006 · Replies 7 · Jan 12, 2006

Replies: 7

Views: 3K

Undergrad Why don't stars explode? What holds them together?

Oct 28, 2005 · Replies 32 · Jan 12, 2006

2

Replies: 32

Views: 15K

Undergrad Planetary Orbits Around Black Holes

Jan 12, 2006 · Replies 2 · Jan 12, 2006

Replies: 2

Views: 2K

Undergrad How do they know the universe is expanding

Jan 10, 2006 · Replies 9 · Jan 12, 2006

Replies: 9

Views: 4K

Graduate Can We Really Leave Our Universe and Explore Other Dimensions?

Jan 6, 2006 · Replies 7 · Jan 12, 2006

Replies: 7

Views: 5K

Heim-Dröscher space,eight-dimensional universe, Mars-Earth: three hour trip

Jan 11, 2006 · Replies 1 · Jan 11, 2006

Replies: 1

Views: 6K

Earth Seen from Mars - NASA JPL Image

Dec 31, 2005 · Replies 4 · Jan 11, 2006

Replies: 4

Views: 4K

Undergrad Placing an Asteroid in Moon Orbit: Is It Possible?

Dec 27, 2005 · Replies 16 · Jan 11, 2006

Replies: 16

Views: 5K

Undergrad Finding the distance to an Asteroid

Jan 11, 2006 · Replies 2 · Jan 11, 2006

Replies: 2

Views: 4K

Graduate The Cosmological Parameters 2005

Jan 9, 2006 · Replies 3 · Jan 11, 2006

Replies: 3

Views: 3K

Destroy a Planet: How to Annihilate a Planet

Jan 9, 2006 · Replies 21 · Jan 11, 2006

Replies: 21

Views: 6K

Graduate Frank Tipler on Matter-Energy Conversion

Jan 3, 2006 · Replies 21 · Jan 7, 2006

Replies: 21

Views: 6K

Earth Space Agency: Your Opinion Matters

Jan 5, 2006 · Replies 2 · Jan 5, 2006

Replies: 2

Views: 2K

Graduate Could Black Holes Survive the Hot Death of the Universe?

Dec 23, 2005 · Replies 4 · Jan 5, 2006

Replies: 4

Views: 4K

Graduate Same star in many places in the sky

Jan 1, 2006 · Replies 11 · Jan 4, 2006

Replies: 11

Views: 4K

Graduate Addressing Impossibilities in the Standard Cosmological Model

Dec 30, 2005 · Replies 33 · Jan 2, 2006

2

Replies: 33

Views: 8K

High School Spacetime Diagram of Binary Star System - Get Visuals & Info

Dec 27, 2005 · Replies 5 · Jan 2, 2006

Replies: 5

Views: 4K

High School Holographic universe and werewolves/shapeshifters.possible?

Nov 8, 2005 · Replies 2 · Jan 1, 2006

Replies: 2

Views: 3K

Graduate New Clifford Will paper (LISA, BHs)

Jan 1, 2006 · Replies 1 · Jan 1, 2006

Replies: 1

Views: 2K

Not your standard '2005 in review' thread

Jan 1, 2006 · Replies 3 · Jan 1, 2006

Replies: 3

Views: 2K

Graduate Alternate sources for 3K background radiation?

Dec 29, 2005 · Replies 7 · Jan 1, 2006

Replies: 7

Views: 4K

Undergrad How do the moon's & earth's orbital planes intersect?

Dec 31, 2005 · Replies 1 · Dec 31, 2005

Replies: 1

Views: 13K

Undergrad Understanding Negative Pressure: Physical Description Explained

Dec 27, 2005 · Replies 12 · Dec 30, 2005

Replies: 12

Views: 5K

Undergrad What Causes the Vibrant Cloud Colors on Jupiter?

Dec 28, 2005 · Replies 1 · Dec 29, 2005

Replies: 1

Views: 59K

Undergrad How Big Would a Black Hole Be if All the Stars in the Universe Combined?

Dec 27, 2005 · Replies 6 · Dec 28, 2005

Replies: 6

Views: 6K

Undergrad How Do We Know the Sun's Orbit Through the Galaxy?

Dec 27, 2005 · Replies 2 · Dec 28, 2005

Replies: 2

Views: 6K

Graduate Is It Possible to Destroy Stars Technologically?

Nov 13, 2005 · Replies 27 · Dec 27, 2005

Replies: 27

Views: 7K

High School I am probably going to be critizied for this, but

Sep 16, 2005 · Replies 34 · Dec 27, 2005

2

Replies: 34

Views: 8K

Graduate What Happens When a Star Exceeds the Chandrasekhar Limit and Forms a Black Hole?

Dec 25, 2005 · Replies 3 · Dec 27, 2005

Replies: 3

Views: 3K

Graduate Number of parallel universes formed at each measurement

Dec 24, 2005 · Replies 8 · Dec 26, 2005

Replies: 8

Views: 3K

Graduate The Stable Universe: Human/Alien Intelligence & Time Travel Possibilities

Dec 25, 2005 · Replies 1 · Dec 25, 2005

Replies: 1

Views: 3K

Undergrad Will the temperature in the universe ever reach absolute zero?

Dec 21, 2005 · Replies 3 · Dec 24, 2005

Replies: 3

Views: 4K

Graduate Is All Matter Affected by the Expansion of the Universe?

Dec 19, 2005 · Replies 19 · Dec 23, 2005

Replies: 19

Views: 6K

Undergrad Could Black Holes Be the Opposite of Suns in the Big Bang Theory?

Dec 13, 2005 · Replies 4 · Dec 23, 2005

Replies: 4

Views: 5K

Graduate Could the Big Bang Be a Pinched-Off Bubble from a Greater Dimension?

Dec 17, 2005 · Replies 6 · Dec 22, 2005

Replies: 6

Views: 4K

Graduate Is Blackhole Symmetry Proportional to Information Exchange?

May 5, 2004 · Replies 38 · Dec 21, 2005

2

Replies: 38

Views: 10K

Graduate What do we know about the mysterious dark energy and dark matter?

Dec 20, 2005 · Replies 1 · Dec 20, 2005

Replies: 1

Views: 2K

About to become an armchair astronomer

Dec 19, 2005 · Replies 1 · Dec 20, 2005

Replies: 1

Views: 5K

Graduate CMB: Understanding Uniformity & Isotropy

Dec 19, 2005 · Replies 1 · Dec 20, 2005

Replies: 1

Views: 3K

Undergrad How do know if something is red-shifted without prior knowledge?

Dec 18, 2005 · Replies 4 · Dec 19, 2005

Replies: 4

Views: 2K

Undergrad How Do We Know The Age Of The Universe For Sure?

Dec 16, 2005 · Replies 6 · Dec 19, 2005

Replies: 6

Views: 6K

Graduate Cosmological Constant: Unravelling the Mysteries of Dark Matter

Dec 16, 2005 · Replies 6 · Dec 19, 2005

Replies: 6

Views: 5K

Graduate What is Universeguy's Paradox in the Study of the Pary Galaxy?

Dec 6, 2005 · Replies 26 · Dec 19, 2005

Replies: 26

Views: 5K

Graduate Correct Understanding of Big Bang Theory

Dec 17, 2005 · Replies 3 · Dec 17, 2005

Replies: 3

Views: 3K

Graduate A theory of gravity based on special relativity

Dec 16, 2005 · Replies 7 · Dec 17, 2005

Replies: 7

Views: 3K

Graduate Space-Time Fabric: Is There Anything Beyond?

Dec 16, 2005 · Replies 1 · Dec 16, 2005

Replies: 1

Views: 4K

Graduate How is the Precession of Mercury's Perihelion Calculated and Explained?

Nov 28, 2005 · Replies 15 · Dec 16, 2005

Replies: 15

Views: 7K

Undergrad Understanding the Earth-Moon Center of Mass and Its Effects on Lunar Orbit

Dec 16, 2005 · Replies 7 · Dec 16, 2005

Replies: 7

Views: 11K

Graduate Big Bang and the Law of Conservation of Matter/Energy?

Dec 15, 2005 · Replies 3 · Dec 16, 2005

Replies: 3

Views: 7K

Graduate Explaining the Cuspy Halo Problem

Dec 15, 2005 · Replies 2 · Dec 16, 2005

Replies: 2

Views: 6K

Graduate Will cosmology ever confirm the Big Bang theory?

Dec 15, 2005 · Replies 2 · Dec 16, 2005

Replies: 2

Views: 4K

High School Lifecycles of Stars: What Causes Gravity in the Beginning?

Dec 15, 2005 · Replies 1 · Dec 15, 2005

Replies: 1

Views: 3K

Have You Ever Watched the Movie Spaceballs?

Dec 13, 2005 · Replies 14 · Dec 14, 2005

Replies: 14

Views: 7K

Graduate Uncovering the Truth: Examining the Existence of Gravitational Waves

Dec 4, 2005 · Replies 37 · Dec 14, 2005

2

Replies: 37

Views: 7K

Graduate Discussion/essay for uni on the Inflation proscess

Dec 12, 2005 · Replies 24 · Dec 14, 2005

Replies: 24

Views: 6K

Undergrad Does a Flat Universe Have an Edge?

Dec 12, 2005 · Replies 3 · Dec 14, 2005

Replies: 3

Views: 5K

Undergrad Big Bang & Big Crunch: Questions & Answers

Dec 11, 2005 · Replies 17 · Dec 13, 2005

Replies: 17

Views: 7K

Graduate Could the Big Bang Allow for an Infinite Universe?

Dec 12, 2005 · Replies 1 · Dec 12, 2005

Replies: 1

Views: 9K

Graduate Understanding the Universe: Cosmological Limitations and the Multiverse

Nov 30, 2005 · Replies 9 · Dec 11, 2005

Replies: 9

Views: 2K

High School Some spiral galaxies larger than previously reported

Dec 9, 2005 · Replies 9 · Dec 10, 2005

Replies: 9

Views: 3K

High School Why Do Galaxies Form Spiral Shapes?

Dec 10, 2005 · Replies 1 · Dec 10, 2005

Replies: 1

Views: 3K

What Defines the Space Opera Genre?

Dec 8, 2005 · Replies 6 · Dec 10, 2005

Replies: 6

Views: 3K

Graduate Can a galaxy have a recession velocity greater than the speed of light?

Dec 9, 2005 · Replies 4 · Dec 9, 2005

Replies: 4

Views: 4K

Graduate Solving for Mars Encounter Orbit w/Limited Info

Dec 2, 2005 · Replies 5 · Dec 9, 2005

Replies: 5

Views: 4K

Undergrad What is the true origin of gamma ray bursts?

Nov 23, 2005 · Replies 14 · Dec 9, 2005

Replies: 14

Views: 4K

Graduate Chicago: New Views of the Universe (Dec 8-13,2005)

Dec 8, 2005 · Replies 5 · Dec 8, 2005

Replies: 5

Views: 3K

Graduate How does gravity affect the formation of structures after the big bang?

Dec 3, 2005 · Replies 8 · Dec 8, 2005

Replies: 8

Views: 5K

Neutronium article @ Wikipedia in need of experts and knowledgeables

Dec 5, 2005 · Replies 5 · Dec 8, 2005

Replies: 5

Views: 4K

Graduate VLF Radio Astronomy: Research & Sources

Dec 4, 2005 · Replies 2 · Dec 8, 2005

Replies: 2

Views: 6K

Undergrad 4 Astronomy Problems: ASSISTANCE NEEDED PLEASE

Dec 4, 2005 · Replies 33 · Dec 7, 2005

2

Replies: 33

Views: 6K

Graduate Distinguishing MOND from dark matter

Nov 27, 2005 · Replies 15 · Dec 6, 2005

Replies: 15

Views: 4K

Graduate What role do orbits play in Earth's climate change?

Dec 2, 2005 · Replies 5 · Dec 6, 2005

Replies: 5

Views: 4K

Undergrad Kuiper Belt Info: Sidereal Period & Kepler's Equations

Dec 4, 2005 · Replies 4 · Dec 6, 2005

Replies: 4

Views: 3K

High School Solar System: Size, Planets & Comets

Dec 3, 2005 · Replies 2 · Dec 6, 2005

Replies: 2

Views: 4K

Stargazing Interested in Astrophotography? Check Out My Site!

Dec 4, 2005 · Replies 23 · Dec 5, 2005

Replies: 23

Views: 10K

Undergrad Missing Galaxies? Visible Universe Mystery

Dec 2, 2005 · Replies 11 · Dec 4, 2005

Replies: 11

Views: 5K

Undergrad Is a Miniature Solar System Being Born?

Nov 30, 2005 · Replies 3 · Dec 3, 2005

Replies: 3

Views: 3K

High School What is a Black Hole Actually Made Of?

Nov 28, 2005 · Replies 6 · Dec 3, 2005

Replies: 6

Views: 3K

Graduate Need WMAP error bars for CMBFAST power spectrum output

Jun 25, 2003 · Replies 2 · Dec 2, 2005

Replies: 2

Views: 7K

Undergrad The Universe as big as a basket ball?

Nov 28, 2005 · Replies 6 · Nov 30, 2005

Replies: 6

Views: 12K

Graduate What is Causing the Expansion of a Singular Particle in an Absorbed Universe?

Nov 23, 2005 · Replies 5 · Nov 30, 2005

Replies: 5

Views: 2K

Graduate Recent Supernovae Ia observations tend to rule out all the cosmologies

Nov 22, 2005 · Replies 7 · Nov 30, 2005

Replies: 7

Views: 4K

Graduate Paper - Sun not powered by H fusion

Nov 15, 2005 · Replies 29 · Nov 30, 2005

Replies: 29

Views: 5K

Graduate Could Flattened Disks Explain Galaxy Rotation Without Dark Matter?

Nov 30, 2005 · Replies 1 · Nov 30, 2005

Replies: 1

Views: 2K

High School Intro to Astronomy & Astrophysics

Nov 22, 2005 · Replies 4 · Nov 30, 2005

Replies: 4

Views: 8K

Undergrad Jupiter as a Gravitational lens?

Nov 27, 2005 · Replies 7 · Nov 30, 2005

Replies: 7

Views: 9K

Graduate Does natural selection apply extra-galactically?

Nov 9, 2005 · Replies 17 · Nov 30, 2005

Replies: 17

Views: 4K

Undergrad Edmund halley and the venus transit

Nov 26, 2005 · Replies 10 · Nov 29, 2005

Replies: 10

Views: 5K

Poll

Graduate Andre's Question: A or B Before C?

Nov 6, 2005 · Replies 21 · Nov 29, 2005

Replies: 21

Views: 3K

High School Probe returning with asteroid rock sample

Nov 28, 2005 · Replies 1 · Nov 28, 2005

Replies: 1

Views: 2K

Graduate What Is the Entropy of a Black Hole?

Nov 26, 2005 · Replies 3 · Nov 27, 2005

Replies: 3

Views: 6K

Graduate Does mathematics rule the universe?

Nov 7, 2005 · Replies 25 · Nov 26, 2005

Replies: 25

Views: 14K

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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