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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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High School What Caused the Bright Flash on the Moon on March 17, 2013?

May 19, 2013 · Replies 4 · May 20, 2013

Replies: 4

Views: 3K

Undergrad Debunking the Myth: Why Exposing to Vacuum of Space Won't Make You Explode

May 18, 2013 · Replies 7 · May 20, 2013

Replies: 7

Views: 3K

High School Static Universe vs Expanding Universe

May 19, 2013 · Replies 6 · May 20, 2013

Replies: 6

Views: 3K

Undergrad Will the Moon Ever Escape Tidal Locking?

May 20, 2013 · Replies 2 · May 20, 2013

Replies: 2

Views: 3K

Poll

Would You Take a One-Way Trip to Mars?

Oct 20, 2010 · Replies 72 · May 20, 2013

3

Replies: 72

Views: 20K

Graduate GALAXIES - what was 'extra' so visible matter was presumed missing?

May 18, 2013 · Replies 9 · May 19, 2013

Replies: 9

Views: 3K

Undergrad Is It Natural for the World to Have Zero Angular Momentum?

Apr 28, 2013 · Replies 12 · May 18, 2013

Replies: 12

Views: 5K

Graduate Unraveling the Mystery of Dark Matter and Mass: Fact or Fiction?

May 17, 2013 · Replies 15 · May 18, 2013

Replies: 15

Views: 3K

Graduate A few questions about using power laws

May 15, 2013 · Replies 3 · May 17, 2013

Replies: 3

Views: 2K

Graduate Is the Universe able to evolve due to fundamental forces?

May 17, 2013 · Replies 2 · May 17, 2013

Replies: 2

Views: 2K

Undergrad Why are all the orbits elliptical and not circular?

May 1, 2013 · Replies 6 · May 17, 2013

Replies: 6

Views: 5K

Graduate Why aren't black holes the brightest objects in the universe?

May 4, 2013 · Replies 15 · May 17, 2013

Replies: 15

Views: 3K

Graduate Initial Conditions of Astrophysical Simulations in 3D

Apr 29, 2013 · Replies 4 · May 17, 2013

Replies: 4

Views: 2K

Earth's axial tilt and the shadow from the Sun

May 15, 2013 · Replies 8 · May 16, 2013

Replies: 8

Views: 5K

Undergrad Functions for properties of stars and their planets

May 15, 2013 · Replies 6 · May 16, 2013

Replies: 6

Views: 3K

Graduate Question about eddington luminosity

Apr 22, 2013 · Replies 1 · May 16, 2013

Replies: 1

Views: 3K

High School Consequence of light pointing towards a blackhole

May 14, 2013 · Replies 3 · May 15, 2013

Replies: 3

Views: 2K

Undergrad Shooting images through window pane glass

May 13, 2013 · Replies 3 · May 14, 2013

Replies: 3

Views: 3K

Graduate Mass Luminosity relation doesn't hold true when applied to actual data

May 13, 2013 · Replies 4 · May 14, 2013

Replies: 4

Views: 3K

Graduate Super novae mechanics - how does it work?

May 13, 2013 · Replies 5 · May 13, 2013

Replies: 5

Views: 2K

High School Why does everything in the Universe form a ball or Sphere?

May 9, 2013 · Replies 6 · May 12, 2013

Replies: 6

Views: 10K

Graduate Does Dark Energy break the Conservation of Energy?

May 11, 2013 · Replies 2 · May 12, 2013

Replies: 2

Views: 4K

High School What is the shape of a Black Hole?

May 9, 2013 · Replies 3 · May 12, 2013

Replies: 3

Views: 3K

Graduate What happens to EM waves outside the universe?

May 7, 2013 · Replies 14 · May 11, 2013

Replies: 14

Views: 3K

Graduate Does Distant Starlight Become Coherent Upon Reaching Earth?

May 7, 2013 · Replies 8 · May 10, 2013

Replies: 8

Views: 3K

Graduate Exotic atoms hold clues to unsolved physics puzzle at the dawn of the

May 9, 2013 · Replies 1 · May 9, 2013

Replies: 1

Views: 2K

Undergrad What is the shape of the known universe?

Apr 24, 2013 · Replies 29 · May 9, 2013

Replies: 29

Views: 6K

Graduate The most simple explanation for origination of spiral galaxies?

May 8, 2013 · Replies 4 · May 8, 2013

Replies: 4

Views: 5K

Undergrad Calculate LST: Uncover the Mystery of 100.46

May 6, 2013 · Replies 13 · May 7, 2013

Replies: 13

Views: 10K

Undergrad Example to make clear the difference between specific intensity and fl

May 7, 2013 · Replies 2 · May 7, 2013

Replies: 2

Views: 3K

Undergrad The Ecliptic and the Galactic Planes

May 4, 2013 · Replies 4 · May 6, 2013

Replies: 4

Views: 8K

Graduate Black hole evaporation, where does it all go?

May 6, 2013 · Replies 4 · May 6, 2013

Replies: 4

Views: 2K

Graduate Is the speed of light constant in a vacuum?

May 5, 2013 · Replies 1 · May 5, 2013

Replies: 1

Views: 2K

Undergrad Redshifts & Hubble: How Do We Know Galaxies are Moving?

Jan 9, 2011 · Replies 7 · May 4, 2013

Replies: 7

Views: 4K

Graduate Can Black Holes Consume Light Without Increasing in Mass?

May 2, 2013 · Replies 5 · May 3, 2013

Replies: 5

Views: 3K

Graduate How to measure the location of Gamma ray burst ?

Apr 25, 2013 · Replies 3 · May 3, 2013

Replies: 3

Views: 3K

Undergrad Does gravity affect time on different celestial objects

May 1, 2013 · Replies 3 · May 2, 2013

Replies: 3

Views: 3K

High School Saturn hurricane spotted by Cassini

Apr 30, 2013 · Replies 2 · May 1, 2013

Replies: 2

Views: 3K

Graduate Does angular diameter distance vary with composition of the Universe?

Apr 30, 2013 · Replies 4 · Apr 30, 2013

Replies: 4

Views: 3K

High School Uncovering the Mystery: Comparing the Russian Meteor to the Tunguska Event

Apr 29, 2013 · Replies 2 · Apr 30, 2013

Replies: 2

Views: 3K

Graduate Can the fabric of space ripple like a gentle wave in the ocean?

Apr 29, 2013 · Replies 1 · Apr 29, 2013

Replies: 1

Views: 2K

High School Universe Expansion: Understanding the Concept

Apr 18, 2013 · Replies 8 · Apr 29, 2013

Replies: 8

Views: 3K

Undergrad Gravitational Lensing vs Gravitational Microlensing

Apr 29, 2013 · Replies 1 · Apr 29, 2013

Replies: 1

Views: 2K

High School Expanding Universe: What Does it Mean?

Apr 26, 2013 · Replies 21 · Apr 29, 2013

Replies: 21

Views: 4K

Stargazing Using the Celestron C90 telescope

Apr 27, 2013 · Replies 9 · Apr 29, 2013

Replies: 9

Views: 8K

Undergrad Distance modulus and redshift Ia supernovae Catalog

Apr 28, 2013 · Replies 1 · Apr 28, 2013

Replies: 1

Views: 3K

Graduate Solar and geomagnetic field interaction with or without solar wind

Apr 24, 2013 · Replies 7 · Apr 28, 2013

Replies: 7

Views: 4K

Undergrad If the universe is infinite, then the big bang theory can't be correct

Apr 28, 2013 · Replies 2 · Apr 28, 2013

Replies: 2

Views: 5K

High School Time taken for earth to orbit the sun?

Apr 1, 2013 · Replies 12 · Apr 27, 2013

Replies: 12

Views: 5K

High School Jeans Mass Formula - Find Solution Now!

Apr 27, 2013 · Replies 2 · Apr 27, 2013

Replies: 2

Views: 3K

Graduate Question regarding maximum accretion of black holes

Apr 26, 2013 · Replies 1 · Apr 27, 2013

Replies: 1

Views: 2K

Undergrad Question Regarding the Orbit of Comets

Apr 26, 2013 · Replies 3 · Apr 26, 2013

Replies: 3

Views: 3K

Undergrad Did the Chelyabinsk meteor really explode ?

Apr 25, 2013 · Replies 4 · Apr 26, 2013

Replies: 4

Views: 3K

Graduate Do Schwarzschild Black Holes exist?

Apr 24, 2013 · Replies 11 · Apr 26, 2013

Replies: 11

Views: 5K

Graduate Jeans instabiity & gravitational collapse

Apr 25, 2013 · Replies 3 · Apr 26, 2013

Replies: 3

Views: 3K

Graduate Why are scientists puzzled at the time of the universe that we are in?

Apr 25, 2013 · Replies 2 · Apr 25, 2013

Replies: 2

Views: 3K

High School Moon's Orbit: The Science Behind Its Path

Apr 24, 2013 · Replies 6 · Apr 25, 2013

Replies: 6

Views: 2K

Undergrad Can this planet have an ocean of water?

Apr 23, 2013 · Replies 11 · Apr 25, 2013

Replies: 11

Views: 4K

NASA SDO: 3 Years of Solar Images

Apr 25, 2013 · Replies 1 · Apr 25, 2013

Replies: 1

Views: 3K

Graduate How can two Black holes fusion and consist a supermassive Black Hole

Apr 22, 2013 · Replies 7 · Apr 24, 2013

Replies: 7

Views: 4K

Graduate Speed of light in a dark matter medium

Apr 20, 2013 · Replies 7 · Apr 24, 2013

Replies: 7

Views: 4K

Graduate Can We Make Contact with an Anti-Matter Black Hole?

Apr 23, 2013 · Replies 8 · Apr 24, 2013

Replies: 8

Views: 4K

Graduate Will charged black holes evaporate?

Apr 20, 2012 · Replies 23 · Apr 23, 2013

Replies: 23

Views: 5K

High School Why do black holes have such strong gravitational pull?

Apr 23, 2013 · Replies 3 · Apr 23, 2013

Replies: 3

Views: 2K

Stargazing Pictures from the Hubble Space Telescope

Apr 21, 2013 · Replies 2 · Apr 23, 2013

Replies: 2

Views: 4K

Undergrad Satellite with period equal to that of its planet?

Apr 21, 2013 · Replies 3 · Apr 22, 2013

Replies: 3

Views: 2K

Need a good analogy of finding life in the universe

Mar 3, 2013 · Replies 36 · Apr 21, 2013

2

Replies: 36

Views: 10K

High School Space and Matter: Does it Push Objects?

Apr 20, 2013 · Replies 2 · Apr 20, 2013

Replies: 2

Views: 2K

Undergrad Kepler mission announces possibly habitable planets found (18 April)

Apr 18, 2013 · Replies 6 · Apr 20, 2013

Replies: 6

Views: 4K

Graduate World's record for highest freq photon ever seen, nature or lab?

Apr 19, 2013 · Replies 4 · Apr 19, 2013

Replies: 4

Views: 3K

Graduate Black hole acceleration beyond C?

May 28, 2012 · Replies 13 · Apr 17, 2013

Replies: 13

Views: 3K

Graduate Why dark matter is dark but not atoms

Apr 17, 2013 · Replies 5 · Apr 17, 2013

Replies: 5

Views: 2K

Undergrad Will PhoneSat revolutionize satellite technology?

Apr 17, 2013 · Replies 1 · Apr 17, 2013

Replies: 1

Views: 2K

Undergrad Equation of Gravity's influence relative to objects

Apr 17, 2013 · Replies 1 · Apr 17, 2013

Replies: 1

Views: 2K

Undergrad What Are Quasars & How Do They Work?

Apr 11, 2013 · Replies 5 · Apr 16, 2013

Replies: 5

Views: 2K

High School Why do stars collapse in on itself ?

Apr 2, 2013 · Replies 20 · Apr 16, 2013

Replies: 20

Views: 19K

Undergrad How Does Spinning a Ship in Space Create Artificial Gravity?

Apr 15, 2013 · Replies 11 · Apr 16, 2013

Replies: 11

Views: 3K

Undergrad Tidal bulge on the moon, and its facing etc

Mar 16, 2013 · Replies 8 · Apr 16, 2013

Replies: 8

Views: 4K

Graduate Hubbles law and expansion of the universe

Apr 15, 2013 · Replies 8 · Apr 16, 2013

Replies: 8

Views: 4K

Undergrad Origin of the Moon and it's Retreat

Apr 14, 2013 · Replies 5 · Apr 16, 2013

Replies: 5

Views: 3K

High School Is it possible for a star to gain mass throughout it's life?

Apr 14, 2013 · Replies 6 · Apr 16, 2013

Replies: 6

Views: 6K

Undergrad Why is Far-UV spectrum unobservable

Apr 15, 2013 · Replies 2 · Apr 15, 2013

Replies: 2

Views: 2K

Undergrad Directing dangerous objects to Sun

Apr 14, 2013 · Replies 6 · Apr 15, 2013

Replies: 6

Views: 3K

Stargazing $1.3 billion Thirty Meter Telescope (TMT) gets approved

Apr 15, 2013 · Replies 2 · Apr 15, 2013

Replies: 2

Views: 4K

Undergrad Can Asteroid Mining Technology Serve as a Global Defense System?

Apr 24, 2012 · Replies 65 · Apr 15, 2013

3

Replies: 65

Views: 17K

Graduate How quickly would Mars loose its atmosphere?

Apr 13, 2013 · Replies 3 · Apr 14, 2013

Replies: 3

Views: 3K

High School Calculating the Kinetic Energy of a Meteor: What Factors Influence its Velocity?

Apr 14, 2013 · Replies 5 · Apr 14, 2013

Replies: 5

Views: 7K

Graduate Why do stars collapse in ot itself? Part 2

Apr 10, 2013 · Replies 14 · Apr 14, 2013

Replies: 14

Views: 3K

Undergrad Observing stuff in space over various distances

Apr 12, 2013 · Replies 9 · Apr 14, 2013

Replies: 9

Views: 3K

Undergrad Is Staring at a Red Dwarf Harmful?

Apr 11, 2013 · Replies 11 · Apr 13, 2013

Replies: 11

Views: 5K

Graduate Understanding Mercury's Precession

Apr 11, 2013 · Replies 5 · Apr 13, 2013

Replies: 5

Views: 3K

Undergrad Characteristics of electromagnetic waves traveling through the cosmos.

Apr 12, 2013 · Replies 9 · Apr 13, 2013

Replies: 9

Views: 2K

High School What is the Speed of Earth on its Orbit During Equinoxes and Solstices?

Apr 10, 2013 · Replies 9 · Apr 13, 2013

Replies: 9

Views: 5K

Graduate Exploring the Transparency of Black Holes: A Relativity Question

Apr 11, 2013 · Replies 17 · Apr 13, 2013

Replies: 17

Views: 3K

Graduate Are black holes explained by complex analysis?

Apr 8, 2013 · Replies 16 · Apr 11, 2013

Replies: 16

Views: 5K

Graduate Atomic Hydrogen gas cloud to Star

Apr 9, 2013 · Replies 9 · Apr 11, 2013

Replies: 9

Views: 4K

Undergrad The acceleration of the expansion of the known universe

Apr 7, 2013 · Replies 27 · Apr 11, 2013

Replies: 27

Views: 5K

Graduate Do All Stars Rely on Quantum Tunneling for Fusion?

Apr 10, 2013 · Replies 2 · Apr 11, 2013

Replies: 2

Views: 2K

Graduate Why do the smallest luminous objects lie along a line corresponding to

Apr 10, 2013 · Replies 5 · Apr 10, 2013

Replies: 5

Views: 2K

Graduate Eternity's Big Bounce: What Do You Think?

Apr 10, 2013 · Replies 1 · Apr 10, 2013

Replies: 1

Views: 2K

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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