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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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Graduate What is the Purpose of Fitting Supernova Remnant Spectra?

Apr 22, 2015 · Replies 1 · Apr 22, 2015

Replies: 1

Views: 1K

CRAYFIS Initiative: Is it Worth Joining?

Apr 22, 2015 · Replies 1 · Apr 22, 2015

Replies: 1

Views: 1K

Undergrad Olbers' paradox and infinite number of stars

Mar 29, 2015 · Replies 16 · Apr 22, 2015

Replies: 16

Views: 5K

Graduate Why Does Luminosity Drop Before a Star Becomes a White Dwarf?

Apr 16, 2015 · Replies 17 · Apr 21, 2015

Replies: 17

Views: 3K

Centaurus A Image Through 27.5" Telescope | iTelescope.net

Apr 15, 2015 · Replies 18 · Apr 21, 2015

Replies: 18

Views: 3K

Omega Centauri: Amazing Image from 2-Month Clear Night

Apr 15, 2015 · Replies 2 · Apr 21, 2015

Replies: 2

Views: 1K

Graduate Saha equation partition function for Argon?

Apr 19, 2015 · Replies 5 · Apr 21, 2015

Replies: 5

Views: 4K

Graduate Which stage of the sun consists neutron star/stars

Apr 21, 2015 · Replies 3 · Apr 21, 2015

Replies: 3

Views: 1K

High School From what dark matter in space consist of?

Apr 21, 2015 · Replies 9 · Apr 21, 2015

Replies: 9

Views: 2K

Astronomy Calendar of Celestial Events

May 2, 2014 · Replies 17 · Apr 21, 2015

Replies: 17

Views: 8K

Graduate Technical stuff about visualizing BH (Hollywood helpers)

Feb 12, 2015 · Replies 3 · Apr 19, 2015

Replies: 3

Views: 2K

Undergrad Origin of the Solar System: Understanding Hydrogen & Heavy Elements

Apr 18, 2015 · Replies 10 · Apr 19, 2015

Replies: 10

Views: 3K

Different understanding of the universe if .

Apr 19, 2015 · Replies 2 · Apr 19, 2015

Replies: 2

Views: 1K

Undergrad Why Do Astronauts Feel Weightless on Their Journey to the Moon?

Apr 14, 2015 · Replies 20 · Apr 18, 2015

Replies: 20

Views: 6K

Graduate Acceleration of expansion of Universe not that fast?

Apr 12, 2015 · Replies 2 · Apr 17, 2015

Replies: 2

Views: 2K

Undergrad Why do geosynchronous satellites have to orbit above the Equator?

Jun 11, 2013 · Replies 6 · Apr 16, 2015

Replies: 6

Views: 24K

What Does Pluto Really Look Like?

Apr 14, 2015 · Replies 3 · Apr 16, 2015

Replies: 3

Views: 2K

Undergrad Absolute magnitude and luminosity

Apr 14, 2015 · Replies 2 · Apr 15, 2015

Replies: 2

Views: 2K

Graduate Precession of Mercury and period of rotation

Apr 15, 2015 · Replies 1 · Apr 15, 2015

Replies: 1

Views: 2K

Undergrad Why can't we reach to Speed of light at Space?

Mar 4, 2015 · Replies 122 · Apr 15, 2015

5

Replies: 122

Views: 20K

Graduate How do micro black holes maintain their state?

Apr 14, 2015 · Replies 3 · Apr 14, 2015

Replies: 3

Views: 2K

Undergrad Difference in power and absolute magnitude of a star

Apr 14, 2015 · Replies 3 · Apr 14, 2015

Replies: 3

Views: 3K

Graduate How Are Electron Clouds Affected in Neutron Stars?

Mar 24, 2015 · Replies 18 · Apr 14, 2015

Replies: 18

Views: 3K

Graduate Black Hole Time Dilation And Observation Of Accretion

Mar 28, 2015 · Replies 30 · Apr 14, 2015

2

Replies: 30

Views: 5K

Graduate Are Pop III Stars Finally Detected in I Zw 18?

Apr 13, 2015 · Replies 5 · Apr 13, 2015

Replies: 5

Views: 2K

Graduate Observed Redshift Variation Over TIme

Apr 12, 2015 · Replies 3 · Apr 13, 2015

Replies: 3

Views: 2K

A Space Geek's Return to the Forums

Apr 11, 2015 · Replies 7 · Apr 13, 2015

Replies: 7

Views: 2K

Chance for the public to name features on Pluto and Charon

Apr 11, 2015 · Replies 5 · Apr 13, 2015

Replies: 5

Views: 2K

High School Have you explored the incredible galaxies at Galaxy Zoo?

Jan 28, 2015 · Replies 5 · Apr 12, 2015

Replies: 5

Views: 3K

Graduate Sublimation temperature of water in vacuum = 150K ?

Feb 17, 2015 · Replies 18 · Apr 11, 2015

Replies: 18

Views: 12K

Graduate Spectroscopic system, AB magnitudes

Apr 7, 2015 · Replies 2 · Apr 10, 2015

Replies: 2

Views: 2K

Undergrad Is the universe truly expanding?

Mar 24, 2015 · Replies 83 · Apr 10, 2015

3

Replies: 83

Views: 10K

Undergrad Why is the speed of light 186,000 miles per second?

Apr 5, 2015 · Replies 37 · Apr 10, 2015

2

Replies: 37

Views: 11K

Undergrad Difference between a red giant and red supergiant?

Mar 28, 2015 · Replies 4 · Apr 10, 2015

Replies: 4

Views: 25K

Graduate Stefan-Boltzmann law, luminosity, brightness and magnitude?

Apr 9, 2015 · Replies 2 · Apr 9, 2015

Replies: 2

Views: 3K

Graduate Why do toddlers have a logarithmic understanding of numbers?

Apr 9, 2015 · Replies 11 · Apr 9, 2015

Replies: 11

Views: 14K

Undergrad Was Space Present Before the Big Bang?

Apr 7, 2015 · Replies 13 · Apr 9, 2015

Replies: 13

Views: 3K

Undergrad SDP.81 : how do we see the gavitational lens?

Apr 9, 2015 · Replies 2 · Apr 9, 2015

Replies: 2

Views: 1K

Undergrad Time Theory in Astrophysics: How Is It Possible?

Apr 8, 2015 · Replies 13 · Apr 8, 2015

Replies: 13

Views: 2K

Undergrad Question About Gravitational Time Dilation

Apr 1, 2015 · Replies 3 · Apr 8, 2015

Replies: 3

Views: 2K

Favorite Prominent / Professional Astrophotographers

Apr 7, 2015 · Replies 2 · Apr 8, 2015

Replies: 2

Views: 1K

Graduate Death of Sun: Habitable Zone & Timeline

Mar 26, 2015 · Replies 8 · Apr 7, 2015

Replies: 8

Views: 4K

Undergrad Doubt About Hour Angle: How Can It Change So Little?

Apr 6, 2015 · Replies 4 · Apr 6, 2015

Replies: 4

Views: 2K

High School Constant acceleration of gravity

Apr 5, 2015 · Replies 2 · Apr 6, 2015

Replies: 2

Views: 1K

High School Understanding Gravitational Pull and Its Effects on Humans

Mar 29, 2015 · Replies 12 · Apr 5, 2015

Replies: 12

Views: 3K

Graduate Galaxy Merger Energy: Calculating Total System Energy

Apr 5, 2015 · Replies 8 · Apr 5, 2015

Replies: 8

Views: 2K

Graduate Julian Ephemeris Date from Ephemeris Time

Apr 3, 2015 · Replies 1 · Apr 3, 2015

Replies: 1

Views: 8K

Graduate What is the relationship between orbital semi latus rectum and angular momentum?

Apr 2, 2015 · Replies 3 · Apr 3, 2015

Replies: 3

Views: 5K

Undergrad Why does the Sun behave like a black body?

Mar 24, 2015 · Replies 32 · Apr 3, 2015

2

Replies: 32

Views: 19K

Graduate Bending of space and time, is it true?

Mar 28, 2015 · Replies 71 · Apr 2, 2015

3

Replies: 71

Views: 7K

Graduate How Can We Harness the Power of Space Elevators and Atmospheric Electricity?

Mar 31, 2015 · Replies 7 · Apr 2, 2015

Replies: 7

Views: 3K

Graduate Black holes in the globular cluster M22 with Dr. Tom Maccarone

Mar 30, 2015 · Replies 12 · Apr 2, 2015

Replies: 12

Views: 4K

High School Planetary Alignment: Mercury Out of Sync

Mar 28, 2015 · Replies 12 · Apr 1, 2015

Replies: 12

Views: 3K

Stargazing Is this a realistic design for a kilometer wide telescope?

Mar 30, 2015 · Replies 14 · Apr 1, 2015

Replies: 14

Views: 4K

Graduate Scientific importance of total Solar eclipses?

Mar 31, 2015 · Replies 10 · Mar 31, 2015

Replies: 10

Views: 3K

Graduate The Potential of Titan: Igniting Methane Oceans for Photosynthesis

Mar 29, 2015 · Replies 34 · Mar 31, 2015

2

Replies: 34

Views: 4K

High School Do we all belong to the same star?

Mar 29, 2015 · Replies 7 · Mar 30, 2015

Replies: 7

Views: 2K

Undergrad Proof to Kepler's first and second laws

Mar 30, 2015 · Replies 3 · Mar 30, 2015

Replies: 3

Views: 2K

Stargazing Understanding reflecting telescopes?

Mar 28, 2015 · Replies 6 · Mar 29, 2015

Replies: 6

Views: 4K

Undergrad How wide is the observable horizon, at sea level?

Mar 27, 2015 · Replies 10 · Mar 29, 2015

Replies: 10

Views: 15K

Graduate High redshift galaxies in the HUDF

Mar 28, 2015 · Replies 1 · Mar 29, 2015

Replies: 1

Views: 2K

Graduate Fundamental Relationship Between Time and Space Derivatives

Mar 28, 2015 · Replies 6 · Mar 29, 2015

Replies: 6

Views: 4K

Undergrad What is the center of a globular clusters made of?

Feb 12, 2015 · Replies 50 · Mar 28, 2015

2

Replies: 50

Views: 9K

Graduate Forming Stars: 2 Conditions and Criteria Explained

Mar 18, 2015 · Replies 5 · Mar 28, 2015

Replies: 5

Views: 2K

Graduate Classifying Exoplanets: Size & Surface Temperature

Mar 22, 2015 · Replies 6 · Mar 27, 2015

Replies: 6

Views: 4K

Undergrad How Can We Reach Habitable Exoplanets?

Mar 27, 2015 · Replies 8 · Mar 27, 2015

Replies: 8

Views: 2K

Graduate Supernova prediction: SN Refsdal

Mar 27, 2015 · Replies 1 · Mar 27, 2015

Replies: 1

Views: 1K

Undergrad Exoplanet Eccentricity vs Orbital Period

Mar 27, 2015 · Replies 5 · Mar 27, 2015

Replies: 5

Views: 2K

Undergrad Saturn Day Shorter Than Expected | Ken Croswell | Science

Mar 25, 2015 · Replies 4 · Mar 27, 2015

Replies: 4

Views: 2K

Is the Hubble Telescope Smiling at a Gravitational Lens?

Feb 18, 2015 · Replies 12 · Mar 27, 2015

Replies: 12

Views: 2K

Stargazing How Do Lasers Work in Telescopes to Capture Images of the Universe?

Mar 25, 2015 · Replies 3 · Mar 27, 2015

Replies: 3

Views: 2K

High School Fake magnification and other information

Feb 25, 2015 · Replies 6 · Mar 27, 2015

Replies: 6

Views: 2K

Stargazing Understanding the Field of View of Reflecting and Refracting Telescopes

Mar 26, 2015 · Replies 9 · Mar 27, 2015

Replies: 9

Views: 6K

Graduate Question on possible dark matter classification

Mar 26, 2015 · Replies 9 · Mar 27, 2015

Replies: 9

Views: 2K

Undergrad Question about spectral lines of stars?

Mar 27, 2015 · Replies 3 · Mar 27, 2015

Replies: 3

Views: 2K

I got a bad feelin' about this Chewie turn us around

Mar 25, 2015 · Replies 4 · Mar 26, 2015

Replies: 4

Views: 2K

Stargazing Quick question about telescope classification

Mar 26, 2015 · Replies 3 · Mar 26, 2015

Replies: 3

Views: 2K

Graduate Black Holes & Galaxies: How Do They Work Together?

Mar 25, 2015 · Replies 3 · Mar 26, 2015

Replies: 3

Views: 3K

Graduate Could a Collapsing Black Hole Be the Origin of Our Universe?

Mar 25, 2015 · Replies 9 · Mar 25, 2015

Replies: 9

Views: 2K

Stargazing Viewing stars through a refracting telescope?

Mar 25, 2015 · Replies 2 · Mar 25, 2015

Replies: 2

Views: 2K

High School Are Jupiter's bands visible with binoculars?

Mar 11, 2015 · Replies 17 · Mar 24, 2015

Replies: 17

Views: 5K

How Did I Capture Orion and Comet Lovejoy in Arizona?

Mar 22, 2015 · Replies 4 · Mar 24, 2015

Replies: 4

Views: 2K

Undergrad Why is the universe considered to be flat?

Mar 24, 2015 · Replies 3 · Mar 24, 2015

Replies: 3

Views: 2K

High School Measuring Light Years: How Far Is the Andromeda Galaxy?

Mar 23, 2015 · Replies 3 · Mar 24, 2015

Replies: 3

Views: 2K

Graduate Entire universe ending with a supermassive black hole?

Mar 20, 2015 · Replies 10 · Mar 24, 2015

Replies: 10

Views: 3K

Did You Capture the March 17 Aurora Borealis?

Mar 22, 2015 · Replies 2 · Mar 23, 2015

Replies: 2

Views: 1K

Graduate Eccentric & Mean Anomaly: Difference & Drawing

Mar 23, 2015 · Replies 2 · Mar 23, 2015

Replies: 2

Views: 2K

What Is the Significance of the Solar Eclipse on March 20, 2015?

Mar 19, 2015 · Replies 13 · Mar 23, 2015

Replies: 13

Views: 2K

Feeling insignificant after watching space movies

Mar 21, 2015 · Replies 10 · Mar 22, 2015

Replies: 10

Views: 2K

Undergrad Multiple universes: Nothing more than philosophising?

Mar 5, 2015 · Replies 46 · Mar 22, 2015

2

Replies: 46

Views: 6K

Amazing shot of a meteor over Loch Ness

Mar 18, 2015 · Replies 6 · Mar 21, 2015

Replies: 6

Views: 2K

Graduate Tidal lock and landmass on a Earth-like planet

Mar 21, 2015 · Replies 1 · Mar 21, 2015

Replies: 1

Views: 2K

Meteor trajectories -- Interested in computing them?

Mar 20, 2015 · Replies 4 · Mar 21, 2015

Replies: 4

Views: 2K

Graduate John Seach Discovers 6.0 Mag Nova in Sagittarius, NSW, Australia

Mar 19, 2015 · Replies 2 · Mar 20, 2015

Replies: 2

Views: 2K

Graduate Water vapor observed venting from Ceres

Jan 22, 2014 · Replies 6 · Mar 20, 2015

Replies: 6

Views: 3K

Undergrad Rare Plume on Mars: A Mystery Baffling Scientists

Feb 16, 2015 · Replies 3 · Mar 20, 2015

Replies: 3

Views: 2K

Graduate Pre-Big Bang Space-Time: A Possibility or a Speculation?

Mar 19, 2015 · Replies 6 · Mar 19, 2015

Replies: 6

Views: 2K

Undergrad Calculating the distance between the clusters

Mar 18, 2015 · Replies 5 · Mar 18, 2015

Replies: 5

Views: 3K

Graduate Does Dark Matter Impact the Properties of Black Holes?

Jul 26, 2013 · Replies 13 · Mar 17, 2015

Replies: 13

Views: 5K

Undergrad Could we get to the moon using only classical mechanics?

Mar 17, 2015 · Replies 2 · Mar 17, 2015

Replies: 2

Views: 1K

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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