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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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Undergrad Why can't we go to the center of the galaxy?

May 20, 2004 · Replies 37 · May 25, 2004

2

Replies: 37

Views: 16K

Undergrad Questioning Saturn's Rings: Debunking the Myth of a Young Universe

May 21, 2004 · Replies 7 · May 25, 2004

Replies: 7

Views: 5K

High School Can Time Travel Really Happen Through Black Holes?

May 24, 2004 · Replies 3 · May 25, 2004

Replies: 3

Views: 3K

High School Is There Software That Can Connect My Meade LX200 GPS Telescope to My PC?

May 24, 2004 · Replies 3 · May 24, 2004

Replies: 3

Views: 7K

Graduate Is the Universe Finite or Infinite?

May 21, 2004 · Replies 4 · May 24, 2004

Replies: 4

Views: 3K

High School Can Large Meteors Really Fall Directly on Me?

May 21, 2004 · Replies 2 · May 24, 2004

Replies: 2

Views: 2K

Graduate Is the Big Bang Theory Confusing the Concept of Singularity and Black Holes?

May 21, 2004 · Replies 2 · May 24, 2004

Replies: 2

Views: 3K

High School How to measure the Distance from Earth to Sun?

May 20, 2004 · Replies 11 · May 24, 2004

Replies: 11

Views: 18K

What Unusual Planetary Compositions Could Exist Beyond Earth?

May 23, 2004 · Replies 3 · May 23, 2004

Replies: 3

Views: 2K

How Can I Create a Small Observatory to Watch the Stars?

May 22, 2004 · Replies 9 · May 23, 2004

Replies: 9

Views: 4K

High School How Can We Determine if a Star is Still Active or Already Dead?

May 22, 2004 · Replies 4 · May 23, 2004

Replies: 4

Views: 3K

Help Distance between Mu lep & Nihal?

May 21, 2004 · Replies 2 · May 22, 2004

Replies: 2

Views: 3K

Graduate Is the Big Bang Theory Suppressing Alternative Cosmological Ideas?

May 22, 2004 · Replies 3 · May 22, 2004

Replies: 3

Views: 3K

High School Could Mars Have Lost a Large Moon?

May 15, 2004 · Replies 7 · May 21, 2004

Replies: 7

Views: 5K

Graduate What Comprises the 5% of Visible Matter in the Universe?

May 15, 2004 · Replies 21 · May 21, 2004

Replies: 21

Views: 4K

High School What Are Some Mysteries Surrounding the Sun?

May 21, 2004 · Replies 1 · May 21, 2004

Replies: 1

Views: 3K

Stupid question looking for stupid answer

May 18, 2004 · Replies 6 · May 21, 2004

Replies: 6

Views: 6K

Undergrad Benefits of a Math Minor for an Astrophysics Major

May 10, 2004 · Replies 6 · May 20, 2004

Replies: 6

Views: 3K

High School Falling Stars not beyond my interests.

May 19, 2004 · Replies 7 · May 20, 2004

Replies: 7

Views: 4K

High School What Substances Exist on Stars and How Did They Form?

May 19, 2004 · Replies 4 · May 20, 2004

Replies: 4

Views: 3K

High School Some other curious questions about stars

May 20, 2004 · Replies 1 · May 20, 2004

Replies: 1

Views: 3K

Graduate Angular momentum in close binaries

Apr 22, 2004 · Replies 8 · May 20, 2004

Replies: 8

Views: 4K

Undergrad Methane On Mars (Keeps Increasing)

May 18, 2004 · Replies 3 · May 19, 2004

Replies: 3

Views: 3K

Graduate Is the Accelerated Expansion of the Universe Shrinking Our Visible Universe?

May 6, 2004 · Replies 3 · May 19, 2004

Replies: 3

Views: 3K

Graduate What are the Consequences of Non-Uniform Expansion?

May 16, 2004 · Replies 14 · May 19, 2004

Replies: 14

Views: 5K

Graduate Discussing Braneworld Cosmology & Its Collisions

May 17, 2004 · Replies 7 · May 19, 2004

Replies: 7

Views: 3K

Graduate Is the Friedmann Paradox Solved by the Concordance Model?

May 8, 2004 · Replies 4 · May 19, 2004

Replies: 4

Views: 3K

Undergrad What is the calculated mass of a post supernovae star

May 13, 2004 · Replies 6 · May 18, 2004

Replies: 6

Views: 5K

Graduate Is Spacetime a Closed Volume or a Convoluted Surface?

May 17, 2004 · Replies 3 · May 18, 2004

Replies: 3

Views: 2K

Humanity's Earth history all over again in space

Jan 8, 2004 · Replies 5 · May 18, 2004

Replies: 5

Views: 3K

Graduate Is the Thermal Background of the Universe opaque for certain waves?

May 16, 2004 · Replies 4 · May 18, 2004

Replies: 4

Views: 3K

High School Size of the Moon: Is It Really Different?

May 17, 2004 · Replies 2 · May 17, 2004

Replies: 2

Views: 9K

High School Why Does Starlight Still Shine Brightly in the Sky?

May 15, 2004 · Replies 1 · May 15, 2004

Replies: 1

Views: 3K

Graduate Is Dark Energy's Constant Density Indicative of a Larger Expansive Substance?

May 14, 2004 · Replies 4 · May 15, 2004

Replies: 4

Views: 5K

High School Dark Matters vs Planets: The Mystery Unveiled

May 7, 2004 · Replies 24 · May 15, 2004

Replies: 24

Views: 5K

Graduate How do black holes exhibit varying masses and event horizon radii?

May 11, 2004 · Replies 18 · May 15, 2004

Replies: 18

Views: 3K

Graduate Uneven expansion of the universe?

May 14, 2004 · Replies 4 · May 14, 2004

Replies: 4

Views: 4K

The Risk of Long Space Missions: Should You Take It?

May 14, 2004 · Replies 2 · May 14, 2004

Replies: 2

Views: 2K

Astro-Imaging with Affordable Equipment - My Experiences

May 12, 2004 · Replies 3 · May 13, 2004

Replies: 3

Views: 3K

Graduate How stable is the CMBR map over time?

May 13, 2004 · Replies 3 · May 13, 2004

Replies: 3

Views: 3K

Undergrad Massive Stars Found in Spitzer Reveals Hidden Cloud

May 7, 2004 · Replies 5 · May 13, 2004

Replies: 5

Views: 3K

Undergrad First Photo of planet circling another star

May 12, 2004 · Replies 4 · May 12, 2004

Replies: 4

Views: 6K

Graduate How Do Gravitons Influence Star Velocities in Spiral Galaxies?

May 7, 2004 · Replies 10 · May 12, 2004

Replies: 10

Views: 3K

Poll

High School What Are the Best Websites for Learning About Space?

Mar 23, 2004 · Replies 4 · May 12, 2004

Replies: 4

Views: 4K

Stargazing Astrophotography with Afocal Method: Tips for Better Results

May 11, 2004 · Replies 3 · May 12, 2004

Replies: 3

Views: 10K

High School Looking for Easy-to-Understand Articles on Dark Matter?

May 11, 2004 · Replies 2 · May 11, 2004

Replies: 2

Views: 2K

What Was There Before the Universe Was Created?

May 4, 2004 · Replies 10 · May 10, 2004

Replies: 10

Views: 9K

Graduate Unraveling the Big Bang: Common Sense Questions and Ideas

May 9, 2004 · Replies 3 · May 10, 2004

Replies: 3

Views: 4K

Is Space Travel Worth the Investment When Earth Needs Attention?

Jan 7, 2004 · Replies 58 · May 10, 2004

2

Replies: 58

Views: 10K

Astronomy Trivia Challenge: Can You Answer These Questions About the Night Sky?

Mar 8, 2003 · Replies 506 · May 9, 2004

17

Replies: 506

Views: 57K

Graduate 2 N-Dimensional Space Intersection

May 9, 2004 · Replies 1 · May 9, 2004

Replies: 1

Views: 3K

Graduate Doesn't every particle distort space-time?

May 5, 2004 · Replies 6 · May 7, 2004

Replies: 6

Views: 4K

Graduate Closer to the Monster - supermassive black hole

May 6, 2004 · Replies 2 · May 7, 2004

Replies: 2

Views: 3K

Graduate Is Dark Matter a 'Pressure' caused by something 'outside' of the Universe?

May 5, 2004 · Replies 5 · May 6, 2004

Replies: 5

Views: 4K

Graduate What is the Justification for Using Only 4 Dimensions to Explain the Universe?

Apr 28, 2004 · Replies 9 · May 6, 2004

Replies: 9

Views: 3K

High School Cosmic Ray Detector: Equipment & DIY Builds

May 5, 2004 · Replies 2 · May 6, 2004

Replies: 2

Views: 3K

Graduate What Defines the Limits of Anomalous Planets?

May 4, 2004 · Replies 2 · May 5, 2004

Replies: 2

Views: 3K

Graduate Cosmic microwave background radiation

May 4, 2004 · Replies 3 · May 4, 2004

Replies: 3

Views: 3K

Undergrad Methane Everywhere (I Told You All)

Apr 4, 2004 · Replies 24 · May 3, 2004

Replies: 24

Views: 7K

High School Can Life Travel to Other Worlds From Earth?

Apr 16, 2004 · Replies 6 · May 3, 2004

Replies: 6

Views: 2K

Undergrad Equator Day Length for Zero Gravity: What's the Answer?

Apr 1, 2004 · Replies 14 · May 3, 2004

Replies: 14

Views: 8K

Undergrad How Accurate is the Current Value for 1 AU?

Apr 29, 2004 · Replies 5 · May 3, 2004

Replies: 5

Views: 13K

Undergrad The angular size of stars - prac astronomy

May 2, 2004 · Replies 3 · May 3, 2004

Replies: 3

Views: 7K

Graduate Is the Particle Horizon Calculation Affected by Inflation?

Apr 28, 2004 · Replies 6 · May 3, 2004

Replies: 6

Views: 7K

High School Round or Not: The Shape of Planets and Stars Explained

May 1, 2004 · Replies 2 · May 1, 2004

Replies: 2

Views: 3K

Graduate Is There an Equivalence Between Fundamental Forces and Spacetime Geometry?

Apr 22, 2004 · Replies 25 · Apr 29, 2004

Replies: 25

Views: 4K

Undergrad Does an infinite universe effect an infinite outlook?

Apr 5, 2004 · Replies 11 · Apr 28, 2004

Replies: 11

Views: 6K

Undergrad Does Earth's Size Affect Your Weight?

Apr 28, 2004 · Replies 1 · Apr 28, 2004

Replies: 1

Views: 2K

High School How Was the Parsec Calculated?

Apr 28, 2004 · Replies 3 · Apr 28, 2004

Replies: 3

Views: 3K

Undergrad Educational value of going through a Hoagland webpage?

Apr 19, 2004 · Replies 22 · Apr 28, 2004

Replies: 22

Views: 4K

Graduate Can Black Holes Increase Their Mass According to Remote Observers?

Apr 26, 2004 · Replies 8 · Apr 27, 2004

Replies: 8

Views: 5K

Undergrad Expanding universe and absolute zero

Apr 20, 2004 · Replies 14 · Apr 27, 2004

Replies: 14

Views: 4K

Graduate Accelerated expansion and its rate

Apr 22, 2004 · Replies 7 · Apr 27, 2004

Replies: 7

Views: 4K

Gravity Probe B went up at 9:57 AM today

Apr 21, 2004 · Replies 10 · Apr 27, 2004

Replies: 10

Views: 3K

Undergrad Calculating Solar Sail Size for Propulsion Against Sun's Gravitational Force

Apr 26, 2004 · Replies 3 · Apr 26, 2004

Replies: 3

Views: 7K

High School Oort Cloud: Confirmed or Hypothetical?

Apr 24, 2004 · Replies 8 · Apr 26, 2004

Replies: 8

Views: 5K

Graduate Ultra Deep Field raises questions

Apr 22, 2004 · Replies 6 · Apr 25, 2004

Replies: 6

Views: 4K

Graduate Is information lost in a black hole?

Apr 7, 2004 · Replies 11 · Apr 25, 2004

Replies: 11

Views: 4K

Graduate How Do We Differentiate Between Relativity and Doppler Redshift?

Apr 19, 2004 · Replies 9 · Apr 25, 2004

Replies: 9

Views: 3K

Undergrad Energy and the end of the universe.

Apr 21, 2004 · Replies 4 · Apr 22, 2004

Replies: 4

Views: 3K

High School Stellar Evolution: A Quick Overview of Star Types

Apr 21, 2004 · Replies 12 · Apr 22, 2004

Replies: 12

Views: 3K

Undergrad Is Jupiter Losing Its Spots?

Apr 22, 2004 · Replies 1 · Apr 22, 2004

Replies: 1

Views: 2K

Graduate The Big Bang: Inside a Singularity

Apr 21, 2004 · Replies 1 · Apr 22, 2004

Replies: 1

Views: 2K

Time and the Time Space Continuum

Apr 19, 2004 · Replies 1 · Apr 21, 2004

Replies: 1

Views: 3K

Undergrad Do All Man-Made Solar Satellites Share the Same Orbit Orientation?

Apr 21, 2004 · Replies 2 · Apr 21, 2004

Replies: 2

Views: 3K

Graduate Why is there no symmetry in space vs. time dimensions?

Nov 26, 2003 · Replies 4 · Apr 21, 2004

Replies: 4

Views: 5K

Undergrad How Can Gravity Be Simulated for Space Travelers?

Apr 14, 2004 · Replies 23 · Apr 20, 2004

Replies: 23

Views: 4K

Graduate Are Black Holes Real or Just Theoretical Constructs?

Apr 8, 2004 · Replies 21 · Apr 18, 2004

Replies: 21

Views: 4K

Object photographed by Mars rover

Apr 15, 2004 · Replies 10 · Apr 17, 2004

Replies: 10

Views: 4K

Poll

Graduate Shape of the Universe: Calibi-Yau 4D Geometry?

Apr 16, 2004 · Replies 7 · Apr 17, 2004

Replies: 7

Views: 3K

Graduate Finite hyperbolic universe and large scale structure patterns

Apr 16, 2004 · Replies 2 · Apr 16, 2004

Replies: 2

Views: 4K

Graduate Making a Black Hole Bomb: Exploiting Superradiant Scattering

Apr 14, 2004 · Replies 1 · Apr 14, 2004

Replies: 1

Views: 3K

Graduate How do General Relativity and the concept of the graviton relate to each other?

Apr 14, 2004 · Replies 4 · Apr 14, 2004

Replies: 4

Views: 2K

Undergrad Why do we believe ultra high energy cosmic rays come from supernovae?

Apr 14, 2004 · Replies 1 · Apr 14, 2004

Replies: 1

Views: 2K

Unprecedented weaponization of space

Mar 30, 2004 · Replies 19 · Apr 13, 2004

Replies: 19

Views: 3K

Graduate How is the density of a white dwarf star calculated?

Apr 7, 2004 · Replies 10 · Apr 13, 2004

Replies: 10

Views: 12K

Undergrad What Fascinating Discoveries Await on Titan?

Apr 13, 2004 · Replies 1 · Apr 13, 2004

Replies: 1

Views: 4K

Graduate Is Proxima Cen the nearest star?

Jan 15, 2004 · Replies 14 · Apr 13, 2004

Replies: 14

Views: 4K

Undergrad Experts Call on Senate for Support for Near-Earth Object Search

Apr 9, 2004 · Replies 3 · Apr 12, 2004

Replies: 3

Views: 2K

Graduate Interstellar Medium and Pulsars

Apr 11, 2004 · Replies 3 · Apr 12, 2004

Replies: 3

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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