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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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Stargazing Comets 252P/LINEAR and P/2016 BA14

Mar 19, 2016 · Replies 4 · Apr 3, 2016

Replies: 4

Views: 2K

Insights How Representative is the Night Sky? - Comments

Apr 2, 2016 · Replies 3 · Apr 2, 2016

Replies: 3

Views: 2K

I Convert to "Of Date" Apparent coordinates from "J2000" coordinates

Mar 28, 2016 · Replies 1 · Apr 2, 2016

Replies: 1

Views: 4K

I What is the similarity between the spectra of white dwarfs and the sun?

Apr 2, 2016 · Replies 6 · Apr 2, 2016

Replies: 6

Views: 2K

A Astronomical Implications of Quantum Entanglement?

Apr 1, 2016 · Replies 4 · Apr 2, 2016

Replies: 4

Views: 2K

B Day-related calculations for BC dates

Apr 1, 2016 · Replies 7 · Apr 1, 2016

Replies: 7

Views: 2K

B Gas Giants & Stars: Do They Have a Solid Part?

Apr 1, 2016 · Replies 5 · Apr 1, 2016

Replies: 5

Views: 2K

Does the Sun's Movement Create a Solar System Vortex Motion?

Apr 1, 2016 · Replies 1 · Apr 1, 2016

Replies: 1

Views: 2K

B Tidally Locked Planets: How Close to the Star?

Mar 31, 2016 · Replies 2 · Mar 31, 2016

Replies: 2

Views: 2K

B What Is the Lifespan of a Neutron Star?

Mar 24, 2016 · Replies 19 · Mar 31, 2016

Replies: 19

Views: 24K

I What's Next for Astrogeology and Planetary Sciences?

Mar 22, 2016 · Replies 3 · Mar 30, 2016

Replies: 3

Views: 2K

Stargazing Amateurs Discover Asteroid Impacting Jupiter

Mar 29, 2016 · Replies 4 · Mar 30, 2016

Replies: 4

Views: 2K

I Could "dark matter" be regions where Lambda is lower?

Mar 29, 2016 · Replies 2 · Mar 29, 2016

Replies: 2

Views: 2K

B How Much Do Astronauts Age at Light Speed on a 50-Light-Year Journey?

Mar 27, 2016 · Replies 22 · Mar 29, 2016

Replies: 22

Views: 3K

B Why Does Free Space Permittivity Have Its Specific Value?

Mar 28, 2016 · Replies 1 · Mar 28, 2016

Replies: 1

Views: 2K

B Is the Earth the centre of the universe?

Mar 8, 2016 · Replies 24 · Mar 28, 2016

Replies: 24

Views: 4K

A Do Large Galaxies Exist Without Central Supermassive Black Holes?

Mar 23, 2016 · Replies 1 · Mar 28, 2016

Replies: 1

Views: 2K

B What would be the minimum size for a galaxy to have a disk form?

Mar 27, 2016 · Replies 1 · Mar 27, 2016

Replies: 1

Views: 1K

What happens to light when it reaches the edge of the universe?

Apr 26, 2004 · Replies 95 · Mar 26, 2016

4

Replies: 95

Views: 44K

B Planet/Dwarf Planet Classification - Regarding Rogue Bodies

Mar 25, 2016 · Replies 11 · Mar 26, 2016

Replies: 11

Views: 2K

I Calculated solar irradiation not matching up with measured

Mar 24, 2016 · Replies 1 · Mar 24, 2016

Replies: 1

Views: 1K

B Discover the Phenomenon of One New Star Every Hour: Science Daily"

Mar 23, 2016 · Replies 1 · Mar 23, 2016

Replies: 1

Views: 1K

B Why is the CMB relatively uniform?

Mar 22, 2016 · Replies 5 · Mar 22, 2016

Replies: 5

Views: 2K

B How was the KSN 2011d Supernova Detected?

Mar 22, 2016 · Replies 4 · Mar 22, 2016

Replies: 4

Views: 2K

Lift-off of ExoMars mission to find life on Red Planet

Mar 14, 2016 · Replies 4 · Mar 22, 2016

Replies: 4

Views: 2K

Stargazing Diameter of Charles Messier's Telescope

Mar 22, 2016 · Replies 6 · Mar 22, 2016

Replies: 6

Views: 2K

I Are almost all stars in the night sky brighter than the Sun?

Mar 15, 2016 · Replies 40 · Mar 22, 2016

2

Replies: 40

Views: 11K

B How come black holes have a mass?

Mar 21, 2016 · Replies 6 · Mar 22, 2016

Replies: 6

Views: 3K

B Why isn't water on the ISS dangerous?

Mar 20, 2016 · Replies 3 · Mar 21, 2016

Replies: 3

Views: 2K

Direction of stars' orbits around galactic center

Mar 20, 2016 · Replies 1 · Mar 20, 2016

Replies: 1

Views: 2K

B Why Does LIGO Only Detect the Famous 'Chirp' Pulse from Black Hole Mergers?

Mar 5, 2016 · Replies 8 · Mar 20, 2016

Replies: 8

Views: 2K

I Binary system of a neutron star with a black hole

Mar 18, 2016 · Replies 2 · Mar 19, 2016

Replies: 2

Views: 2K

A Solar drive / neutron atmosphere

Mar 18, 2016 · Replies 5 · Mar 18, 2016

Replies: 5

Views: 2K

A What is the solution to the black hole information paradox?

Mar 17, 2016 · Replies 2 · Mar 17, 2016

Replies: 2

Views: 1K

Ceres' bright spots seen in striking new detail

Sep 14, 2015 · Replies 4 · Mar 17, 2016

Replies: 4

Views: 1K

B Pulsars and Neutron Stars debunked?

Mar 17, 2016 · Replies 4 · Mar 17, 2016

Replies: 4

Views: 2K

I Asymmetric Tensor: Definition & Examples

Mar 13, 2016 · Replies 1 · Mar 17, 2016

Replies: 1

Views: 1K

B How does the cosmic background radiation help us measure expansion in cosmology?

Mar 12, 2016 · Replies 4 · Mar 16, 2016

Replies: 4

Views: 2K

B Gravity at the Core of the Sun: How Strong is it?

Mar 16, 2016 · Replies 4 · Mar 16, 2016

Replies: 4

Views: 3K

I How to Convert Plummer Distribution of Stars Parameters into Standard Units?

Mar 15, 2016 · Replies 1 · Mar 16, 2016

Replies: 1

Views: 1K

Could Planets Have Dual Cores Similar to Cell Structures?

Mar 16, 2016 · Replies 1 · Mar 16, 2016

Replies: 1

Views: 2K

Stargazing How to measure a magnifying glass (I want to build a telescope)

Mar 15, 2016 · Replies 2 · Mar 15, 2016

Replies: 2

Views: 1K

B How is the characteristic age of pulsars typically calculated?

Mar 14, 2016 · Replies 2 · Mar 15, 2016

Replies: 2

Views: 3K

B Is the Expansion Rate Truly Accelerating?

Mar 15, 2016 · Replies 1 · Mar 15, 2016

Replies: 1

Views: 1K

I Detecting organic compounds in interstellar dust

Mar 15, 2016 · Replies 2 · Mar 15, 2016

Replies: 2

Views: 1K

B Orbit Likelihood: The Odds of Objects Falling into Stable Orbits Explained

Mar 14, 2016 · Replies 2 · Mar 14, 2016

Replies: 2

Views: 1K

Stargazing Calculating a Telescope's Limiting Magnitude

Mar 12, 2016 · Replies 3 · Mar 14, 2016

Replies: 3

Views: 4K

Stargazing Setting up first telescope - need advice

Mar 9, 2016 · Replies 9 · Mar 14, 2016

Replies: 9

Views: 2K

B How Will Scott Kelly's Space Radiation Exposure Affect His Health?

Mar 8, 2016 · Replies 10 · Mar 13, 2016

Replies: 10

Views: 2K

B How far outward can we rule out intelligent life?

Feb 9, 2016 · Replies 94 · Mar 12, 2016

4

Replies: 94

Views: 11K

Stargazing Receding Galaxies and the Range of Gravity

Feb 25, 2016 · Replies 15 · Mar 11, 2016

Replies: 15

Views: 2K

B Are Lunar Phases Affected by Earth's Orbit and Rotation?

Mar 10, 2016 · Replies 6 · Mar 10, 2016

Replies: 6

Views: 2K

I How to calculate kinematic distances in the Milky Way

Mar 9, 2016 · Replies 1 · Mar 10, 2016

Replies: 1

Views: 2K

I How to determine an asteroid survey efficiency?

Dec 29, 2015 · Replies 4 · Mar 10, 2016

Replies: 4

Views: 2K

B Black Holes and Degenerate Pressure

Feb 29, 2016 · Replies 5 · Mar 9, 2016

Replies: 5

Views: 2K

B Trying to understand the Andromeda-Milky Way collision

Mar 4, 2016 · Replies 9 · Mar 8, 2016

Replies: 9

Views: 3K

B Does a Star's Fuel Running Out Lead to a Black Hole or Stellar Plasma?

Mar 6, 2016 · Replies 35 · Mar 8, 2016

2

Replies: 35

Views: 4K

B What do you see at the edge of the universe?

Mar 8, 2016 · Replies 3 · Mar 8, 2016

Replies: 3

Views: 2K

B Black Holes and Hawking radiation

Mar 4, 2016 · Replies 5 · Mar 7, 2016

Replies: 5

Views: 2K

Can We Create a Magnetic Field on Mars through Moon Formation?

Aug 22, 2012 · Replies 44 · Mar 7, 2016

2

Replies: 44

Views: 27K

I Rotation curve of galaxy Keplerian method

Mar 6, 2016 · Replies 4 · Mar 6, 2016

Replies: 4

Views: 2K

I Extinct Curium 247 Found in Meteors

Mar 5, 2016 · Replies 3 · Mar 6, 2016

Replies: 3

Views: 1K

I Early Earth: A Rapid Spin Through History

Feb 21, 2016 · Replies 10 · Mar 4, 2016

Replies: 10

Views: 2K

I Plausibility of high density rocky planets

Feb 19, 2016 · Replies 9 · Mar 4, 2016

Replies: 9

Views: 2K

A How Do Black Holes Affect Time and the Fate of the Universe?

Mar 4, 2016 · Replies 2 · Mar 4, 2016

Replies: 2

Views: 1K

Degeneracy pressure and stellar collapse

Mar 3, 2016 · Replies 2 · Mar 4, 2016

Replies: 2

Views: 2K

A Is Detecting Distant Asteroids/NEOs from the ISS Possible?

Mar 1, 2016 · Replies 8 · Mar 4, 2016

Replies: 8

Views: 2K

B Intergalactic Stars: Are There Single Stars Between Galaxies?

Feb 29, 2016 · Replies 21 · Mar 3, 2016

Replies: 21

Views: 4K

B How Far Back Can We See with Better Optics?

Mar 3, 2016 · Replies 9 · Mar 3, 2016

Replies: 9

Views: 2K

Directed panspermia mission to Mercury

Feb 22, 2016 · Replies 28 · Mar 3, 2016

Replies: 28

Views: 3K

I Inconsistencies re Astronomical constants

Feb 22, 2016 · Replies 13 · Mar 2, 2016

Replies: 13

Views: 2K

I Earth rotation different in hemisphere

Mar 1, 2016 · Replies 8 · Mar 2, 2016

Replies: 8

Views: 3K

I Dark Matter Halo & Newton's Shell Theorem

Feb 15, 2016 · Replies 12 · Mar 2, 2016

Replies: 12

Views: 4K

A Could gamma rays imply GW sources not black holes?

Feb 28, 2016 · Replies 5 · Mar 1, 2016

Replies: 5

Views: 2K

Is this possible "giant planet' a hot topic in astronomy?

Feb 14, 2016 · Replies 10 · Feb 29, 2016

Replies: 10

Views: 3K

Artificial Intelligence and astrophysics

Feb 19, 2016 · Replies 5 · Feb 29, 2016

Replies: 5

Views: 2K

Interferometry of distant sources

Feb 26, 2016 · Replies 4 · Feb 28, 2016

Replies: 4

Views: 1K

Question about Orbits of Moon/Earth around Sun

Feb 26, 2016 · Replies 3 · Feb 26, 2016

Replies: 3

Views: 2K

Acceleration in an Elliptical Orbit

Feb 26, 2016 · Replies 4 · Feb 26, 2016

Replies: 4

Views: 3K

Is the Expansion of Space/Time a Result of Object Motion or Framework Growth?

Feb 25, 2016 · Replies 3 · Feb 25, 2016

Replies: 3

Views: 1K

Kepler's third law for elliptical orbits

Feb 21, 2016 · Replies 10 · Feb 25, 2016

Replies: 10

Views: 6K

Increase in Radius when a Star becomes a Red Giant

Feb 23, 2016 · Replies 3 · Feb 24, 2016

Replies: 3

Views: 3K

Does Dark Matter Contribute to the Mass, Charge, and Spin of Black Holes?

Feb 16, 2016 · Replies 13 · Feb 24, 2016

Replies: 13

Views: 2K

Conundrum of Solving True Anomaly in Binary Orbits: A Scientist's Dilemma

Feb 21, 2016 · Replies 3 · Feb 22, 2016

Replies: 3

Views: 2K

Do Magnetic Fields Affect Photons in Binary Pulsars?

Feb 18, 2016 · Replies 4 · Feb 22, 2016

Replies: 4

Views: 2K

Integrating equations of motion with Earth perturbations

Feb 16, 2016 · Replies 1 · Feb 21, 2016

Replies: 1

Views: 2K

How Did Earth's Rotation Change After the Moon's Formation?

Feb 14, 2016 · Replies 19 · Feb 20, 2016

Replies: 19

Views: 3K

B What Is Our Current Understanding of the Fabric of Space?

Aug 14, 2015 · Replies 7 · Feb 20, 2016

Replies: 7

Views: 2K

What causes orbits to change over time?

Feb 18, 2016 · Replies 15 · Feb 19, 2016

Replies: 15

Views: 2K

Stargazing Stellar abberation (water in telescope)

Feb 18, 2016 · Replies 2 · Feb 18, 2016

Replies: 2

Views: 2K

Why does the moon look full in my photos,....

Feb 15, 2016 · Replies 53 · Feb 18, 2016

2

Replies: 53

Views: 6K

EM length of gravitational waves

Feb 17, 2016 · Replies 7 · Feb 18, 2016

Replies: 7

Views: 2K

LIGO discovery on gravitational waves.

Feb 12, 2016 · Replies 18 · Feb 17, 2016

Replies: 18

Views: 2K

Gravitational waves, compensate for the Earth's movement

Feb 15, 2016 · Replies 10 · Feb 17, 2016

Replies: 10

Views: 3K

Are researchers really this interested in 'Planet 9'

Feb 13, 2016 · Replies 6 · Feb 16, 2016

Replies: 6

Views: 2K

Difference between spacetime and the gravitational field?

Feb 16, 2016 · Replies 1 · Feb 16, 2016

Replies: 1

Views: 2K

First manned mission to another planet

Feb 15, 2016 · Replies 10 · Feb 16, 2016

Replies: 10

Views: 2K

Was a New Supernova Discovered in the Galaxy Centaurus A?

Feb 14, 2016 · Replies 2 · Feb 15, 2016

Replies: 2

Views: 2K

Computing 'Sound' Frequency of a Planet: Possible Methods?

Feb 15, 2016 · Replies 4 · Feb 15, 2016

Replies: 4

Views: 4K

Can a black hole shrink another black hole's event horizon?

Feb 15, 2016 · Replies 5 · Feb 15, 2016

Replies: 5

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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