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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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Does gravity affect time on different celestial objects

May 1, 2013 · Replies 3 · May 2, 2013

Replies: 3

Views: 3K

Saturn hurricane spotted by Cassini

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

Replies: 2

Views: 3K

Does angular diameter distance vary with composition of the Universe?

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

Replies: 4

Views: 3K

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

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

Replies: 2

Views: 3K

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

Universe Expansion: Understanding the Concept

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

Replies: 8

Views: 3K

Gravitational Lensing vs Gravitational Microlensing

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

Replies: 1

Views: 2K

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

Distance modulus and redshift Ia supernovae Catalog

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

Replies: 1

Views: 3K

Solar and geomagnetic field interaction with or without solar wind

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

Replies: 7

Views: 4K

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

Time taken for earth to orbit the sun?

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

Replies: 12

Views: 5K

Jeans Mass Formula - Find Solution Now!

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

Replies: 2

Views: 3K

Question regarding maximum accretion of black holes

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

Replies: 1

Views: 2K

Question Regarding the Orbit of Comets

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

Replies: 3

Views: 3K

Did the Chelyabinsk meteor really explode ?

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

Replies: 4

Views: 3K

Do Schwarzschild Black Holes exist?

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

Replies: 11

Views: 5K

Jeans instabiity & gravitational collapse

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

Replies: 3

Views: 3K

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

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: 2K

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

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

Replies: 7

Views: 4K

Speed of light in a dark matter medium

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

Replies: 7

Views: 4K

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

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

Replies: 8

Views: 4K

Will charged black holes evaporate?

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

Replies: 23

Views: 5K

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

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: 9K

Space and Matter: Does it Push Objects?

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

Replies: 2

Views: 2K

Kepler mission announces possibly habitable planets found (18 April)

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

Replies: 6

Views: 4K

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

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

Replies: 4

Views: 3K

Black hole acceleration beyond C?

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

Replies: 13

Views: 3K

Why dark matter is dark but not atoms

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

Replies: 5

Views: 2K

Will PhoneSat revolutionize satellite technology?

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

Replies: 1

Views: 2K

Equation of Gravity's influence relative to objects

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

Replies: 1

Views: 2K

What Are Quasars & How Do They Work?

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

Replies: 5

Views: 2K

Why do stars collapse in on itself ?

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

Replies: 20

Views: 19K

How Does Spinning a Ship in Space Create Artificial Gravity?

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

Replies: 11

Views: 3K

Tidal bulge on the moon, and its facing etc

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

Replies: 8

Views: 4K

Hubbles law and expansion of the universe

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

Replies: 8

Views: 4K

Origin of the Moon and it's Retreat

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

Replies: 5

Views: 3K

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

Why is Far-UV spectrum unobservable

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

Replies: 2

Views: 2K

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

Can Asteroid Mining Technology Serve as a Global Defense System?

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

3

Replies: 65

Views: 17K

How quickly would Mars loose its atmosphere?

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

Replies: 3

Views: 3K

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

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

Replies: 5

Views: 7K

Observing stuff in space over various distances

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

Replies: 9

Views: 3K

Is Staring at a Red Dwarf Harmful?

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

Replies: 11

Views: 5K

Understanding Mercury's Precession

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

Replies: 5

Views: 3K

Characteristics of electromagnetic waves traveling through the cosmos.

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

Replies: 9

Views: 2K

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

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

Replies: 9

Views: 4K

Exploring the Transparency of Black Holes: A Relativity Question

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

Replies: 17

Views: 3K

Are black holes explained by complex analysis?

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

Replies: 16

Views: 5K

Atomic Hydrogen gas cloud to Star

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

Replies: 9

Views: 4K

The acceleration of the expansion of the known universe

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

Replies: 27

Views: 5K

Do All Stars Rely on Quantum Tunneling for Fusion?

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

Replies: 2

Views: 2K

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

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

Replies: 5

Views: 2K

Eternity's Big Bounce: What Do You Think?

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

Replies: 1

Views: 2K

The Earth as pendulum tied not to the Sun

Apr 7, 2013 · Replies 9 · Apr 10, 2013

Replies: 9

Views: 3K

Size of VY Canismajoris and gravity

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

Replies: 5

Views: 4K

What is the estimated worth of a planet made entirely of diamond?

Apr 2, 2013 · Replies 21 · Apr 9, 2013

Replies: 21

Views: 6K

Can Extended Theories of Gravity Explain Dark Matter and Dark Energy?

Mar 27, 2013 · Replies 24 · Apr 8, 2013

Replies: 24

Views: 5K

Placing a cargo on a parabolic orbit from europa moon of Jupiter

Mar 1, 2013 · Replies 3 · Apr 8, 2013

Replies: 3

Views: 3K

What is this galaxy? I can't work it out

Apr 7, 2013 · Replies 17 · Apr 8, 2013

Replies: 17

Views: 4K

Understanding Circumstellar Disks: Exploring Surface Density in 3D

Apr 4, 2013 · Replies 6 · Apr 7, 2013

Replies: 6

Views: 3K

Is Earth Orbiting the Sun Dynamically?

Apr 7, 2013 · Replies 8 · Apr 7, 2013

Replies: 8

Views: 4K

Why Does the Sun Bob Up and Down in its Orbit?

Mar 27, 2013 · Replies 28 · Apr 7, 2013

Replies: 28

Views: 7K

Can Energy exist with the absence of matter?

Apr 7, 2013 · Replies 2 · Apr 7, 2013

Replies: 2

Views: 3K

Conceptual Q: Gravity, Angular Momentum, and Galaxies

Apr 4, 2013 · Replies 9 · Apr 6, 2013

Replies: 9

Views: 3K

Is Constant Rest Possible in Outer Space?

Apr 6, 2013 · Replies 2 · Apr 6, 2013

Replies: 2

Views: 2K

Could the Big Bang Have Been a Massive Black Hole Eruption?

Apr 4, 2013 · Replies 17 · Apr 5, 2013

Replies: 17

Views: 4K

Black hole growth and evaporation

Apr 5, 2013 · Replies 2 · Apr 5, 2013

Replies: 2

Views: 3K

Are Statistical Mechanics Adequate for Interstellar and Intergalactic Clouds?

Apr 5, 2013 · Replies 3 · Apr 5, 2013

Replies: 3

Views: 3K

Kudo list of well-written exchanges for the month of April :-D

Apr 4, 2013 · Replies 0 · Apr 4, 2013

Replies: 0

Views: 2K

Why doesn't dark matter clump together?

Apr 4, 2013 · Replies 1 · Apr 4, 2013

Replies: 1

Views: 3K

Why Do We Search for Exoplanets?

Mar 28, 2013 · Replies 20 · Apr 3, 2013

Replies: 20

Views: 9K

Analyse Simulated Galaxies with SDSS Telescope | Survey by J.W. Trayford

Apr 3, 2013 · Replies 3 · Apr 3, 2013

Replies: 3

Views: 3K

Are there any large star databases containing mass and density?

Apr 2, 2013 · Replies 4 · Apr 2, 2013

Replies: 4

Views: 4K

What is the TSS Engine and how can it enhance space-related learning?

Mar 11, 2013 · Replies 6 · Apr 2, 2013

Replies: 6

Views: 3K

How can we say star mass affects event horizon diameter ?

Mar 30, 2013 · Replies 5 · Apr 2, 2013

Replies: 5

Views: 2K

What Is Space in Physics?

Mar 25, 2013 · Replies 30 · Apr 2, 2013

2

Replies: 30

Views: 5K

The time it takes the Earth to go around the Sun.

Feb 23, 2013 · Replies 49 · Apr 1, 2013

2

Replies: 49

Views: 14K

Why are Cosmic Rays and Hard X-rays Essential for Heating Molecular Clouds?

Mar 31, 2013 · Replies 2 · Mar 31, 2013

Replies: 2

Views: 3K

The Earth-Sun Relationship: A Matter of Perspective

Oct 12, 2012 · Replies 91 · Mar 29, 2013

4

Replies: 91

Views: 13K

HR diagram: magnitude - luminosity relation

Mar 15, 2013 · Replies 3 · Mar 29, 2013

Replies: 3

Views: 4K

How does the sun burn without oxygen?

Mar 29, 2013 · Replies 5 · Mar 29, 2013

Replies: 5

Views: 5K

Decent papers/articles on black holes

Mar 27, 2013 · Replies 4 · Mar 29, 2013

Replies: 4

Views: 2K

Trying to understand the oscillation of electrons in the magnetic fiel

Mar 27, 2013 · Replies 5 · Mar 28, 2013

Replies: 5

Views: 2K

Understanding the Nature of WIMPS: Bosons or Fermions?

Mar 27, 2013 · Replies 1 · Mar 27, 2013

Replies: 1

Views: 2K

Problems with living outside the Heliosphere?

Mar 25, 2013 · Replies 1 · Mar 26, 2013

Replies: 1

Views: 2K

Life in Universe: Is Intelligent Life Inevitable?

Jun 21, 2011 · Replies 91 · Mar 25, 2013

4

Replies: 91

Views: 22K

Stargazing New cosmic model parameters from South Pole Telescope

Nov 9, 2012 · Replies 35 · Mar 24, 2013

2

Replies: 35

Views: 8K

Can anything truly be stationary in our constantly moving universe?

Mar 24, 2013 · Replies 3 · Mar 24, 2013

Replies: 3

Views: 4K

How Does a Comet's Path Relate to Relativity and Spacetime?

Mar 22, 2013 · Replies 9 · Mar 24, 2013

Replies: 9

Views: 3K

What Are the Fastest Moving Objects in the Universe?

Mar 20, 2013 · Replies 11 · Mar 23, 2013

Replies: 11

Views: 3K

How Does Particle Size Influence Emissivity in Circumstellar Dust?

Mar 21, 2013 · Replies 4 · Mar 22, 2013

Replies: 4

Views: 3K

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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