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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 Age of universe compared to age of sun.

Mar 27, 2004 · Replies 9 · Apr 11, 2004

Replies: 9

Views: 7K

Graduate Gravitational field of globular clusters ?

Apr 11, 2004 · Replies 1 · Apr 11, 2004

Replies: 1

Views: 3K

High School Expanding Universe: Matter Growing?

Apr 8, 2004 · Replies 7 · Apr 11, 2004

Replies: 7

Views: 3K

Undergrad Good astrophysics schools in california

Apr 10, 2004 · Replies 3 · Apr 11, 2004

Replies: 3

Views: 12K

High School Technical name for 'day' on other planets

Apr 9, 2004 · Replies 6 · Apr 10, 2004

Replies: 6

Views: 5K

Graduate What caused inflation in the big bang theory?

Mar 27, 2004 · Replies 17 · Apr 10, 2004

Replies: 17

Views: 5K

Undergrad Why do celestial bodies orbit in such precise speeds and patterns?

Apr 9, 2004 · Replies 4 · Apr 10, 2004

Replies: 4

Views: 3K

Did the Soviets create a space-baby?

Apr 9, 2004 · Replies 7 · Apr 10, 2004

Replies: 7

Views: 3K

Graduate What Are the Key Questions About Hyperspace Travel in Storytelling?

Apr 1, 2004 · Replies 2 · Apr 9, 2004

Replies: 2

Views: 5K

Graduate Chaotic Milky Way and Dark Matter distribution

Apr 9, 2004 · Replies 1 · Apr 9, 2004

Replies: 1

Views: 3K

Undergrad What is the cause of the mysterious blue band surrounding Jupiter?

Mar 8, 2004 · Replies 14 · Apr 8, 2004

Replies: 14

Views: 4K

What Questions Were Asked at the Mars and Moon Meeting?

Apr 5, 2004 · Replies 8 · Apr 7, 2004

Replies: 8

Views: 2K

Curious about Mars and the Moon? Ask away!

Apr 5, 2004 · Replies 3 · Apr 7, 2004

Replies: 3

Views: 2K

Undergrad Discover the Best Books on Celestial Mechanics - Recommendations Inside!

Feb 20, 2004 · Replies 6 · Apr 7, 2004

Replies: 6

Views: 5K

Graduate Gravity: Radiating Energy & Spacetime

Apr 6, 2004 · Replies 4 · Apr 7, 2004

Replies: 4

Views: 3K

Graduate Understand Inflation Theory: Scalar Field & Expansion/Supercooling

Mar 31, 2004 · Replies 2 · Apr 6, 2004

Replies: 2

Views: 3K

Graduate What happens when black holes and dark matter collide?

Apr 3, 2004 · Replies 5 · Apr 6, 2004

Replies: 5

Views: 2K

Undergrad If Today's Phoboday, this must be Mars.

Mar 31, 2004 · Replies 2 · Apr 6, 2004

Replies: 2

Views: 3K

Graduate Matter Exceeding the Speed of Light

Jan 24, 2004 · Replies 9 · Apr 5, 2004

Replies: 9

Views: 4K

Graduate Can Spacetime Curvature change c ?

Apr 1, 2004 · Replies 10 · Apr 2, 2004

Replies: 10

Views: 3K

Graduate Can photons escape a charged, spinning black hole?

Apr 1, 2004 · Replies 2 · Apr 1, 2004

Replies: 2

Views: 4K

Graduate Accepted value for Omega of radiation energy density

Mar 31, 2004 · Replies 1 · Apr 1, 2004

Replies: 1

Views: 3K

Graduate How are space and time related in the space-time ripple-nipple phenomenon?

Mar 28, 2004 · Replies 3 · Apr 1, 2004

Replies: 3

Views: 4K

Have You Ever Seen the Green Flash?

Mar 31, 2004 · Replies 1 · Mar 31, 2004

Replies: 1

Views: 3K

Stargazing Can the Hubble Space Telescope Really See 14.5 Billion Years into the Past?

Mar 29, 2004 · Replies 6 · Mar 30, 2004

Replies: 6

Views: 3K

High School Methane on Mars could signal life [now]

Mar 29, 2004 · Replies 1 · Mar 30, 2004

Replies: 1

Views: 3K

Graduate Alternate Explanations for Redshift in the Universe

Mar 23, 2004 · Replies 25 · Mar 30, 2004

Replies: 25

Views: 5K

Question about the first supernova

Mar 29, 2004 · Replies 2 · Mar 29, 2004

Replies: 2

Views: 2K

Radio search for ET draws a blank

Mar 26, 2004 · Replies 2 · Mar 28, 2004

Replies: 2

Views: 2K

Undergrad Terraforming Mars? Pros, Cons and Implications

Mar 27, 2004 · Replies 10 · Mar 28, 2004

Replies: 10

Views: 4K

High School Supernova could wipe out all life on earth ?

Mar 23, 2004 · Replies 17 · Mar 28, 2004

Replies: 17

Views: 7K

How do the lava flows on Venus reach such incredible lengths?

Mar 26, 2004 · Replies 2 · Mar 28, 2004

Replies: 2

Views: 4K

Graduate How Does Launch Angle Affect Satellite Targeting in Orbital Mechanics?

Mar 27, 2004 · Replies 21 · Mar 27, 2004

Replies: 21

Views: 5K

Undergrad The Mystery of Star Formation: Why Do Gas Clouds Collapse?

Mar 26, 2004 · Replies 4 · Mar 27, 2004

Replies: 4

Views: 2K

Graduate Living on the Inside of a Hollowed-Out Planet: Gravity, Crust Thickness & More

Mar 19, 2004 · Replies 16 · Mar 26, 2004

Replies: 16

Views: 4K

High School NASA Announces Evidence of Briny Water on Ancient Mars - Implications for Life

Mar 24, 2004 · Replies 2 · Mar 25, 2004

Replies: 2

Views: 3K

Graduate Masters of Space: Stop USA Weaponization - A Media Blackout

Mar 16, 2004 · Replies 16 · Mar 23, 2004

Replies: 16

Views: 3K

High School Working on a dossier project for my Java class

Feb 23, 2004 · Replies 2 · Mar 23, 2004

Replies: 2

Views: 3K

Graduate How realistic is the concept of wormholes for space travel?

Mar 23, 2004 · Replies 2 · Mar 23, 2004

Replies: 2

Views: 3K

Another MAJOR finding by Mars rover to be announced Tuesday.

Mar 22, 2004 · Replies 5 · Mar 23, 2004

Replies: 5

Views: 4K

Graduate Is The Speed Of Light Slowing Down ?

Mar 21, 2004 · Replies 3 · Mar 23, 2004

Replies: 3

Views: 6K

Graduate Earth orbit vs. changing mass of Sun

Mar 22, 2004 · Replies 2 · Mar 23, 2004

Replies: 2

Views: 4K

Undergrad How can the distance to nearby stars be calculated using the parallax method?

Mar 22, 2004 · Replies 2 · Mar 23, 2004

Replies: 2

Views: 3K

High School Can You See Light in a Black Hole?

Mar 14, 2004 · Replies 15 · Mar 22, 2004

Replies: 15

Views: 4K

High School Requirements for a habitable planet

Mar 20, 2004 · Replies 14 · Mar 22, 2004

Replies: 14

Views: 6K

Find Astronomical Discrepancies at www.BadAstronomy.com

Mar 20, 2004 · Replies 4 · Mar 22, 2004

Replies: 4

Views: 4K

Undergrad How long does a mission to Mars take, including crew stay?

Mar 20, 2004 · Replies 4 · Mar 22, 2004

Replies: 4

Views: 6K

Undergrad Celestial Reflections: How Far Can Radars Reach in Space?

Dec 7, 2003 · Replies 9 · Mar 21, 2004

Replies: 9

Views: 4K

High School What Are the Largest Stars in Our Universe?

Mar 4, 2004 · Replies 7 · Mar 21, 2004

Replies: 7

Views: 5K

Graduate Gravity of Black Holes: What Escapes and What Doesn't?

Mar 20, 2004 · Replies 3 · Mar 20, 2004

Replies: 3

Views: 4K

Undergrad Bomb Explosion in Space: What Would Happen?

Mar 13, 2004 · Replies 28 · Mar 20, 2004

Replies: 28

Views: 9K

Graduate How Does Gravity Warp Space-Time According to Einstein's Theory?

Mar 19, 2004 · Replies 4 · Mar 20, 2004

Replies: 4

Views: 2K

High School Asteroid 2004 FH: Close Flyby and Potential Impact Creates Concern

Mar 19, 2004 · Replies 2 · Mar 20, 2004

Replies: 2

Views: 6K

Undergrad Dark matter affecting galaxy rotation

Mar 18, 2004 · Replies 4 · Mar 19, 2004

Replies: 4

Views: 4K

Will Advertisements Dominate the Night Sky?

Mar 11, 2004 · Replies 6 · Mar 19, 2004

Replies: 6

Views: 3K

Undergrad Australian Scientists Confirm Past Life On Mars

Mar 17, 2004 · Replies 3 · Mar 19, 2004

Replies: 3

Views: 4K

Undergrad When is a Planet not a Planet ?

Mar 17, 2004 · Replies 2 · Mar 19, 2004

Replies: 2

Views: 7K

What did the Mars rovers discover about Earth from the Martian surface?

Mar 15, 2004 · Replies 2 · Mar 19, 2004

Replies: 2

Views: 4K

What Are Edna and Quaoar in Our Solar System?

Mar 18, 2004 · Replies 2 · Mar 19, 2004

Replies: 2

Views: 3K

Graduate Confidence Levels: Andrew R. Liddle's Astronomy Centre Paper

Mar 8, 2004 · Replies 4 · Mar 19, 2004

Replies: 4

Views: 4K

Graduate Source of gammas from Milky Way centre

Mar 18, 2004 · Replies 5 · Mar 19, 2004

Replies: 5

Views: 2K

Undergrad What Causes Galactic Plains?

Mar 18, 2004 · Replies 5 · Mar 18, 2004

Replies: 5

Views: 5K

High School What is the largest known orbit?

Mar 18, 2004 · Replies 2 · Mar 18, 2004

Replies: 2

Views: 3K

Graduate Avoiding A Crash Course In Planetary Defense

Mar 11, 2004 · Replies 3 · Mar 18, 2004

Replies: 3

Views: 3K

Undergrad Spirit Rover Nightshot 'object'?

Mar 16, 2004 · Replies 7 · Mar 17, 2004

Replies: 7

Views: 3K

Graduate Plotting 180 Degrees Apart Galaxies in Spacetime Diagram

Mar 15, 2004 · Replies 1 · Mar 17, 2004

Replies: 1

Views: 3K

Graduate Unveiling the Ultra Deep Field: The Big Bang Blast of 10,000 Galaxies

Mar 10, 2004 · Replies 3 · Mar 16, 2004

Replies: 3

Views: 6K

Undergrad An ignorant question about cosmology

Mar 12, 2004 · Replies 8 · Mar 16, 2004

Replies: 8

Views: 3K

Graduate Osiris, a chthonian planet - a very physical hell?

Feb 6, 2004 · Replies 8 · Mar 16, 2004

Replies: 8

Views: 6K

Undergrad How far back in time can we observe with our current technology and telescopes?

Feb 16, 2004 · Replies 28 · Mar 16, 2004

Replies: 28

Views: 7K

Graduate How Does a Crystal Turn Space Inside Out?

Mar 10, 2004 · Replies 5 · Mar 16, 2004

Replies: 5

Views: 3K

Graduate Are there practical applications for l2 in mathematics and physics?

Mar 15, 2004 · Replies 3 · Mar 16, 2004

Replies: 3

Views: 3K

High School Have Scientists Discovered a 10th Planet in Our Solar System?

Mar 15, 2004 · Replies 10 · Mar 15, 2004

Replies: 10

Views: 5K

Bush's Moon-Mars Initiative: Political Tool or Real Space Program?

Mar 15, 2004 · Replies 6 · Mar 15, 2004

Replies: 6

Views: 4K

Hubble Supernova Discovery: WOW BEAUTIFUL

Mar 10, 2004 · Replies 4 · Mar 11, 2004

Replies: 4

Views: 2K

Graduate Exploring the Limits of GRBs: A Look at the Integrated Sachs-Wolfe Effect

Oct 31, 2003 · Replies 12 · Mar 11, 2004

Replies: 12

Views: 3K

Graduate Type Ia Supernovae Evidence of Cosmic Deceleration & Acceleration

Mar 9, 2004 · Replies 2 · Mar 11, 2004

Replies: 2

Views: 3K

High School Is it Possible to Fly an Airplane on Mars?

Mar 10, 2004 · Replies 3 · Mar 10, 2004

Replies: 3

Views: 3K

Undergrad Understanding Birkeland Currents in Space

Jul 18, 2003 · Replies 6 · Mar 10, 2004

Replies: 6

Views: 7K

NASA Finds Evidence of "Soaking Wet" Mars with Rover

Mar 2, 2004 · Replies 7 · Mar 8, 2004

Replies: 7

Views: 4K

Graduate Does the MBR display orbital motion relative to us?

Mar 7, 2004 · Replies 5 · Mar 7, 2004

Replies: 5

Views: 3K

What can (US) amateur astronomers do to help save Hubble?

Mar 5, 2004 · Replies 3 · Mar 7, 2004

Replies: 3

Views: 3K

Remind you that Jupiter is really close to Earth

Mar 6, 2004 · Replies 4 · Mar 6, 2004

Replies: 4

Views: 3K

High School Astronomy Project Ideas: Star Collision & More!

Feb 15, 2004 · Replies 4 · Mar 6, 2004

Replies: 4

Views: 3K

High School Can Stars Really Collide?

Mar 4, 2004 · Replies 3 · Mar 6, 2004

Replies: 3

Views: 4K

Graduate WMAP Data Distortion: Recent Evidence

Feb 27, 2004 · Replies 18 · Mar 6, 2004

Replies: 18

Views: 5K

High School How can gyros and fins on spaceships improve long-term survival in space?

Feb 29, 2004 · Replies 5 · Mar 6, 2004

Replies: 5

Views: 5K

Graduate Under abundance of lithium may solve existence DM

Mar 6, 2004 · Replies 2 · Mar 6, 2004

Replies: 2

Views: 3K

High School Unravelling the Mystery of Dark Matter

Mar 5, 2004 · Replies 2 · Mar 5, 2004

Replies: 2

Views: 2K

Graduate Oscilating Universe WITH Perpetual Expansion

Feb 27, 2004 · Replies 2 · Mar 5, 2004

Replies: 2

Views: 3K

Graduate Why Does an Observer Not See Entering a Black Hole?

Mar 4, 2004 · Replies 2 · Mar 5, 2004

Replies: 2

Views: 2K

Undergrad Measuring Astronomical Distances

Feb 28, 2004 · Replies 3 · Mar 4, 2004

Replies: 3

Views: 3K

High School Earth almost put on impact alert

Feb 25, 2004 · Replies 12 · Mar 4, 2004

Replies: 12

Views: 3K

Graduate What is the significance of Fermat's Last Theorem in modern mathematics?

Feb 1, 2004 · Replies 54 · Mar 4, 2004

2

Replies: 54

Views: 8K

High School What does space look like from space?

Feb 28, 2004 · Replies 7 · Mar 3, 2004

Replies: 7

Views: 22K

High School Comparing Telescopes: Konus 500 vs Konus 200 vs Mead LDX55

Mar 3, 2004 · Replies 2 · Mar 3, 2004

Replies: 2

Views: 6K

Graduate Roser Pello's galaxy is receding at 2.3 times the speed of light

Mar 2, 2004 · Replies 6 · Mar 3, 2004

Replies: 6

Views: 4K

Undergrad Observe all the ages of the universe

Mar 2, 2004 · Replies 3 · Mar 2, 2004

Replies: 3

Views: 2K

Opportunity makes 'significant' finding

Mar 1, 2004 · Replies 2 · Mar 2, 2004

Replies: 2

Views: 2K

High School UFO's trapped in the black hole

Mar 2, 2004 · Replies 2 · Mar 2, 2004

Replies: 2

Views: 8K

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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