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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 Reliable Data on Polar Aurora for CERN Experiment

Mar 20, 2014 · Replies 6 · Mar 17, 2015

Replies: 6

Views: 4K

Graduate What happens to the absorbed mass in a collapsing black hole?

Mar 17, 2015 · Replies 9 · Mar 17, 2015

Replies: 9

Views: 2K

Graduate Calculating the radius of a star's core

Mar 15, 2015 · Replies 10 · Mar 17, 2015

Replies: 10

Views: 3K

Undergrad Are there gaps between the rays coming from the sun?

Mar 17, 2015 · Replies 22 · Mar 17, 2015

Replies: 22

Views: 4K

Graduate Why is gravity stronger on earth than the moon?

Mar 12, 2015 · Replies 5 · Mar 17, 2015

Replies: 5

Views: 7K

Undergrad Apparent Magnitude and Intensity Formula

Mar 17, 2015 · Replies 4 · Mar 17, 2015

Replies: 4

Views: 5K

High School How is the radius of the Earth determined?

Mar 4, 2015 · Replies 9 · Mar 17, 2015

Replies: 9

Views: 3K

Graduate What groundbreaking discoveries has Reinhard Genzel made in astrophysics?

May 20, 2013 · Replies 30 · Mar 17, 2015

2

Replies: 30

Views: 8K

Graduate Is it possible that black holes create dark matter/energy?

Mar 16, 2015 · Replies 2 · Mar 16, 2015

Replies: 2

Views: 2K

Undergrad Simulating the Solar System with N-Body Simulation in Java

Mar 14, 2015 · Replies 12 · Mar 16, 2015

Replies: 12

Views: 3K

High School Can We Fly Faster Than a Train?

Mar 16, 2015 · Replies 5 · Mar 16, 2015

Replies: 5

Views: 2K

Graduate Distribution of heavier elements in a planet

Mar 14, 2015 · Replies 6 · Mar 16, 2015

Replies: 6

Views: 2K

Here are some astrophotos I've taken lately

Feb 24, 2015 · Replies 17 · Mar 15, 2015

Replies: 17

Views: 3K

Undergrad Why are Earth-size Planets candidate as habitable planets?

Mar 14, 2015 · Replies 12 · Mar 15, 2015

Replies: 12

Views: 3K

Undergrad Doubts about nebulae and star formation

Feb 27, 2015 · Replies 30 · Mar 14, 2015

2

Replies: 30

Views: 4K

Graduate Would Rapid Expansion of a Parallel Universe Affect a Black Hole?

Mar 3, 2015 · Replies 7 · Mar 13, 2015

Replies: 7

Views: 3K

Graduate Ice worlds' inner oceans--Emily Lakdawalla

Mar 12, 2015 · Replies 9 · Mar 13, 2015

Replies: 9

Views: 2K

Undergrad What's the point of building a space elevator?

Mar 12, 2015 · Replies 5 · Mar 12, 2015

Replies: 5

Views: 2K

Graduate US 708: Hypervelocity Star Ejected by Supernova Breaks G.S.R

Mar 7, 2015 · Replies 10 · Mar 12, 2015

Replies: 10

Views: 2K

High School What really happened during the Tunguska Event?

Mar 7, 2015 · Replies 8 · Mar 12, 2015

Replies: 8

Views: 4K

High School Asteroid 99942 Apophis impacting the Earth in 2029

Feb 27, 2015 · Replies 57 · Mar 11, 2015

2

Replies: 57

Views: 11K

Bisque Software for Astronomy SkyX

Mar 10, 2015 · Replies 5 · Mar 11, 2015

Replies: 5

Views: 2K

Undergrad And now for the latest news from Alpha Centauri

Mar 11, 2015 · Replies 1 · Mar 11, 2015

Replies: 1

Views: 2K

Graduate Reticulum 2 - gamma ray emissions

Mar 11, 2015 · Replies 1 · Mar 11, 2015

Replies: 1

Views: 1K

Graduate Why can't we make a space elevator using Quantum Levitation?

Mar 6, 2015 · Replies 3 · Mar 11, 2015

Replies: 3

Views: 3K

Who Was the First Woman in Space?

Mar 10, 2015 · Replies 2 · Mar 10, 2015

Replies: 2

Views: 2K

High School Big Bang Theory Explained: Is It Disproved?

Mar 10, 2015 · Replies 3 · Mar 10, 2015

Replies: 3

Views: 2K

Graduate Inside Out: The Possibility of White Holes and Black Holes Within Each Other

Mar 10, 2015 · Replies 3 · Mar 10, 2015

Replies: 3

Views: 1K

High School Turning Around in Space: The Challenge of No Gravity

Mar 10, 2015 · Replies 6 · Mar 10, 2015

Replies: 6

Views: 1K

Graduate Other Theorys for the beginning of the Universe?

Mar 10, 2015 · Replies 1 · Mar 10, 2015

Replies: 1

Views: 1K

Graduate Why can we still detect the CMB ?

Mar 7, 2015 · Replies 15 · Mar 9, 2015

Replies: 15

Views: 3K

High School What happen when we reach black hole?

Mar 9, 2015 · Replies 3 · Mar 9, 2015

Replies: 3

Views: 2K

Graduate Calculating the Age of Planets without Radioactive Dating

Mar 7, 2015 · Replies 7 · Mar 9, 2015

Replies: 7

Views: 3K

Graduate How to Calculate Rotation Curves for a Spiral Galaxy?

Mar 3, 2015 · Replies 2 · Mar 8, 2015

Replies: 2

Views: 2K

Graduate Has Anyone Experienced Challenges with the Weber-Davis Solar Wind Model?

Mar 3, 2015 · Replies 2 · Mar 7, 2015

Replies: 2

Views: 2K

Purchasing binoculars for stargazing advice

Feb 20, 2015 · Replies 16 · Mar 7, 2015

Replies: 16

Views: 5K

High School Confusion regarding Solar Eclipse

Mar 6, 2015 · Replies 1 · Mar 6, 2015

Replies: 1

Views: 2K

Graduate 41430 Arietis Quadruple Star System

Mar 6, 2015 · Replies 2 · Mar 6, 2015

Replies: 2

Views: 2K

Graduate Calculating Orbital Pathways with Ellipses and Rosettes

Mar 5, 2015 · Replies 2 · Mar 6, 2015

Replies: 2

Views: 1K

Jupiter's Moons - A Night of Stargazing from Romania

Jan 18, 2015 · Replies 10 · Mar 5, 2015

Replies: 10

Views: 3K

Graduate Is C = π x D Possible in a Universe of Nothing?

Mar 4, 2015 · Replies 5 · Mar 4, 2015

Replies: 5

Views: 2K

Graduate A noobie questioning the nature of space

Feb 21, 2015 · Replies 22 · Mar 4, 2015

Replies: 22

Views: 3K

Graduate How would one protect the Universe?

Mar 3, 2015 · Replies 3 · Mar 3, 2015

Replies: 3

Views: 2K

Graduate What Happens Inside a Black Hole?

Mar 3, 2015 · Replies 7 · Mar 3, 2015

Replies: 7

Views: 2K

Graduate Is the Universe Deterministic or Not?

Feb 6, 2015 · Replies 46 · Mar 3, 2015

2

Replies: 46

Views: 14K

Graduate Calculating relative velocity of Crab Nebula

Mar 3, 2015 · Replies 2 · Mar 3, 2015

Replies: 2

Views: 2K

Graduate How would we measure time and location in space?

Sep 23, 2013 · Replies 5 · Mar 3, 2015

Replies: 5

Views: 3K

Undergrad Sending information in space: an invitation to catastrophe?

Feb 16, 2015 · Replies 16 · Mar 2, 2015

Replies: 16

Views: 2K

High School Help Solving Equation: Notation Explained

Mar 2, 2015 · Replies 3 · Mar 2, 2015

Replies: 3

Views: 1K

Undergrad Horizontal Branch Star: A Planet-like Object Found on ALADIN

Mar 1, 2015 · Replies 3 · Mar 2, 2015

Replies: 3

Views: 2K

Undergrad Earth and moon barycenter question.

Feb 26, 2015 · Replies 8 · Mar 1, 2015

Replies: 8

Views: 3K

High School T: What Stars Are We Seeing Between Galaxies?

Feb 26, 2015 · Replies 3 · Feb 28, 2015

Replies: 3

Views: 2K

Graduate Globular cluster ejected from M87

Feb 26, 2015 · Replies 3 · Feb 27, 2015

Replies: 3

Views: 2K

Graduate Orion Nebula's Origin Uncovered?

Feb 25, 2015 · Replies 1 · Feb 25, 2015

Replies: 1

Views: 2K

Graduate Tracking down Phil Trans xxxv 637

Feb 24, 2015 · Replies 2 · Feb 25, 2015

Replies: 2

Views: 1K

Undergrad Are Martian rock formations similar to those on Earth?

Jan 27, 2015 · Replies 7 · Feb 25, 2015

Replies: 7

Views: 2K

Undergrad What is the mass of Jupiter's white oval storms compared to Earth?

Feb 24, 2015 · Replies 1 · Feb 24, 2015

Replies: 1

Views: 2K

Build a Barn Door Tracker: Tips & Advice

Jan 12, 2015 · Replies 19 · Feb 24, 2015

Replies: 19

Views: 3K

Graduate Predicting orbits and masses of as-yet-unknown bodies

Feb 20, 2015 · Replies 5 · Feb 24, 2015

Replies: 5

Views: 1K

Graduate Kepler's 3rd Law: Constant Orbital Velocity Around Black Holes?

Feb 23, 2015 · Replies 5 · Feb 24, 2015

Replies: 5

Views: 2K

Undergrad Virtual Solar System (formula for gravity in 3d)

Feb 22, 2015 · Replies 1 · Feb 23, 2015

Replies: 1

Views: 2K

Undergrad Seasons due to Earth's elliptical orbit

Feb 16, 2015 · Replies 10 · Feb 22, 2015

Replies: 10

Views: 4K

Undergrad Question about solar energy: angle of incidence

Feb 15, 2015 · Replies 19 · Feb 21, 2015

Replies: 19

Views: 8K

Undergrad Precession of Earth's axis and alignment with stars

Feb 12, 2015 · Replies 5 · Feb 21, 2015

Replies: 5

Views: 3K

Graduate Quantity of matter in the universe?

Feb 19, 2015 · Replies 17 · Feb 20, 2015

Replies: 17

Views: 3K

High School ET Lives in a Multi-Planet Solar System

Feb 20, 2015 · Replies 4 · Feb 20, 2015

Replies: 4

Views: 2K

Graduate Possibility of multiple moons in Earth-Moon system

Jan 22, 2015 · Replies 9 · Feb 20, 2015

Replies: 9

Views: 4K

Graduate Interstellar gas cloud stability

Dec 9, 2013 · Replies 27 · Feb 20, 2015

Replies: 27

Views: 12K

High School Imagine you were spinning in space

Feb 19, 2015 · Replies 2 · Feb 19, 2015

Replies: 2

Views: 1K

Graduate Minimum Orbital Radius Around Black Holes

Feb 19, 2015 · Replies 3 · Feb 19, 2015

Replies: 3

Views: 2K

Graduate How Did Early Black-Hole Dynamics Shape Galaxy Formation?

Feb 8, 2015 · Replies 22 · Feb 18, 2015

Replies: 22

Views: 4K

Graduate If there is a big crunch will space collapse with the matter?

Feb 17, 2015 · Replies 5 · Feb 18, 2015

Replies: 5

Views: 2K

Undergrad How Do Supernovae Contribute to the Birth of New Stars?

Feb 16, 2015 · Replies 15 · Feb 18, 2015

Replies: 15

Views: 3K

Graduate Calculating time until apoapsis analytically

Jul 23, 2014 · Replies 3 · Feb 18, 2015

Replies: 3

Views: 5K

Graduate Neutron Star Collapse: Upper Limit & Physics Explained

Feb 18, 2015 · Replies 2 · Feb 18, 2015

Replies: 2

Views: 2K

Graduate Scholz's star passed through the Oort cloud

Feb 17, 2015 · Replies 1 · Feb 17, 2015

Replies: 1

Views: 2K

Unexpectly captured comet Comet C/2014 Q2 Lovejoy

Jan 3, 2015 · Replies 8 · Feb 16, 2015

Replies: 8

Views: 2K

Undergrad Relationship between characteristic energy and delta-v

Feb 10, 2015 · Replies 4 · Feb 16, 2015

Replies: 4

Views: 5K

High School Baffled by observation -- 3 lights in the night sky

Jan 23, 2015 · Replies 16 · Feb 14, 2015

Replies: 16

Views: 6K

Stargazing Research with Ritchey–Chrétien 400 mm telescope

Feb 12, 2015 · Replies 3 · Feb 14, 2015

Replies: 3

Views: 1K

Graduate Expansion, Gravity and the Electric Force

Feb 10, 2015 · Replies 4 · Feb 13, 2015

Replies: 4

Views: 2K

USB Eyepiece for Microscopes: Quality Viewing from Any Position

Feb 6, 2015 · Replies 6 · Feb 12, 2015

Replies: 6

Views: 2K

Graduate Has the Number of Galactic Revolutions Influenced Spiral Galaxy Formation?

Feb 11, 2015 · Replies 5 · Feb 12, 2015

Replies: 5

Views: 2K

High School Extra Solar Planets: Data & Answers

Feb 10, 2015 · Replies 2 · Feb 11, 2015

Replies: 2

Views: 1K

Graduate How are Solar Flares and Solar Winds Generated by the Sun's Magnetic Field?

Nov 27, 2014 · Replies 5 · Feb 11, 2015

Replies: 5

Views: 3K

Undergrad Need data for galactic rotation curves

Feb 8, 2015 · Replies 1 · Feb 10, 2015

Replies: 1

Views: 2K

Graduate Calculating the Temperature in Space

Feb 9, 2015 · Replies 6 · Feb 9, 2015

Replies: 6

Views: 2K

High School Is there anything like a cosmic mirror?

Feb 8, 2015 · Replies 5 · Feb 9, 2015

Replies: 5

Views: 2K

Undergrad Speed of Galaxies: Defying Physics?

Sep 3, 2014 · Replies 12 · Feb 9, 2015

Replies: 12

Views: 4K

Stargazing Help with telescope/observatory data and images

Feb 8, 2015 · Replies 3 · Feb 8, 2015

Replies: 3

Views: 2K

Undergrad Astronomy: Measuring Radio Wave Distance from Universe

Feb 5, 2015 · Replies 10 · Feb 8, 2015

Replies: 10

Views: 2K

Undergrad "Amount" red light in red shifted light

Feb 7, 2015 · Replies 8 · Feb 8, 2015

Replies: 8

Views: 2K

Graduate Does Hawking's Zero Energy Theory Resolve the Universe's Origin?

Jan 28, 2015 · Replies 6 · Feb 8, 2015

Replies: 6

Views: 3K

Graduate Wrong Explanations for the Luminosity of Main-Sequence Stars

Jan 30, 2015 · Replies 72 · Feb 7, 2015

3

Replies: 72

Views: 7K

Graduate Hawking Says, There are no black holes.

Jan 25, 2014 · Replies 31 · Feb 7, 2015

2

Replies: 31

Views: 8K

Undergrad Is Space Really Empty and What Does That Mean for Propulsion?

Feb 5, 2015 · Replies 35 · Feb 7, 2015

2

Replies: 35

Views: 3K

Undergrad Calculate time (or fraction of orb. period) of sat. in umbra

Feb 5, 2015 · Replies 2 · Feb 6, 2015

Replies: 2

Views: 4K

Graduate Multiverse and Eternal Inflation Disproved?

Feb 5, 2015 · Replies 8 · Feb 6, 2015

Replies: 8

Views: 4K

Graduate Entanglement as the fabric of space-time?

Feb 6, 2015 · Replies 2 · Feb 6, 2015

Replies: 2

Views: 2K

Asteroid 2004 BL86 and its small moon

Feb 4, 2015 · Replies 7 · Feb 6, 2015

Replies: 7

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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