Menu

Navigation

More options

Style variation

Contact us

Astronomy, Astrophysics, Cosmology Forum

Join in expert discussion on the topics of Astronomy, astrophysics and cosmology. This may include discussion on celestial objects, space, and the physical universe as a whole. Mainstream science only.

Filters

Undergrad Calculating the distance between the clusters

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

Replies: 5

Views: 3K

Graduate Has There Been Further Progress in Shape Dynamics Theory?

Feb 5, 2015 · Replies 12 · Mar 18, 2015

Replies: 12

Views: 2K

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

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: 3K

Graduate Calculating the radius of a star's core

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

Replies: 10

Views: 4K

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

Graduate Cosmic expansion in quantum gravity

Mar 15, 2015 · Replies 12 · Mar 17, 2015

Replies: 12

Views: 2K

Graduate Does the Hubble Parameter Go to Zero as the Universe Expands Forever?

Mar 16, 2015 · Replies 10 · Mar 17, 2015

Replies: 10

Views: 2K

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: 9K

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

Undergrad Increase of dark energy with expansion of universe

Mar 13, 2015 · Replies 57 · Mar 16, 2015

2

Replies: 57

Views: 6K

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

Graduate Could Quantum Tunneling from Nothing Equate to the Past or Future?

Mar 13, 2015 · Replies 4 · Mar 15, 2015

Replies: 4

Views: 3K

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

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

Replies: 12

Views: 4K

Graduate What does a Cosmological Constant mean?

Feb 18, 2015 · Replies 11 · Mar 15, 2015

Replies: 11

Views: 3K

Graduate Could the expansion of space tear us apart?

Mar 7, 2015 · Replies 9 · Mar 14, 2015

Replies: 9

Views: 2K

Undergrad Doubts about nebulae and star formation

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

2

Replies: 30

Views: 4K

Graduate Dodecahedron universe after PLanck

Mar 14, 2015 · Replies 13 · Mar 14, 2015

Replies: 13

Views: 4K

Graduate Dark Matter: Could It Form Structures?

Mar 14, 2015 · Replies 11 · Mar 14, 2015

Replies: 11

Views: 2K

Undergrad Is Gravity a well kept secret?

Mar 14, 2015 · Replies 4 · Mar 14, 2015

Replies: 4

Views: 1K

Graduate Is MOND still a viable theory for dark matter?

Jan 15, 2014 · Replies 7 · Mar 14, 2015

Replies: 7

Views: 3K

Graduate An explanation for hemispherical anisotropy in the CMB?

Mar 13, 2015 · Replies 4 · Mar 14, 2015

Replies: 4

Views: 1K

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

Is one lifetime too little to learn all about the Universe?

Mar 11, 2015 · Replies 11 · Mar 13, 2015

Replies: 11

Views: 2K

Graduate Extremely large Black Hole discovered 900M years after BB

Feb 25, 2015 · Replies 47 · Mar 13, 2015

2

Replies: 47

Views: 7K

Graduate Thought Experiment: Where Does the Missing Energy Go?

Jul 8, 2014 · Replies 9 · Mar 13, 2015

Replies: 9

Views: 2K

Graduate How does Horava Lifshitz gravity affect the speed of light in bounce solutions?

Mar 12, 2015 · Replies 6 · Mar 13, 2015

Replies: 6

Views: 2K

Graduate Scale of perturbations re entropy, in quantum bounce

Mar 6, 2015 · Replies 8 · Mar 13, 2015

Replies: 8

Views: 2K

Graduate Is There an Age Problem in the LCDM Cosmological Model?

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

Replies: 7

Views: 2K

Graduate Several questions about the poincare recurrence time?

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

Replies: 5

Views: 3K

Graduate Temperature at beginning of Electroweak Epoch?

Mar 10, 2015 · Replies 8 · Mar 12, 2015

Replies: 8

Views: 4K

Undergrad Why is the universe expanding if its temperature is cooling?

Mar 12, 2015 · Replies 18 · Mar 12, 2015

Replies: 18

Views: 2K

Graduate What is Nothing? Research & Explanation

Mar 12, 2015 · Replies 1 · Mar 12, 2015

Replies: 1

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 Are present and future perspectives different?

Mar 9, 2015 · Replies 16 · Mar 12, 2015

Replies: 16

Views: 3K

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

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

Replies: 10

Views: 2K

Graduate Does the expansion of the universe affect gravitational forces?

Mar 7, 2015 · Replies 17 · Mar 12, 2015

Replies: 17

Views: 3K

High School What really happened during the Tunguska Event?

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

Replies: 8

Views: 4K

Graduate Loophole in theory offers insight into the 'lithium problem'

Mar 12, 2015 · Replies 1 · Mar 12, 2015

Replies: 1

Views: 1K

Undergrad Is Ahmed Hulusi's Theory Supported by Science?

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

Replies: 1

Views: 1K

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: 2K

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

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

Replies: 3

Views: 3K

Graduate Wave equation given a cosmological inflationary metric

Mar 10, 2015 · Replies 4 · Mar 11, 2015

Replies: 4

Views: 1K

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 Scott Dodelson Modern Cosmology 4.2

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

Replies: 1

Views: 5K

Graduate What is the smallest thing discovered in our universe?

Mar 3, 2015 · Replies 27 · Mar 10, 2015

Replies: 27

Views: 7K

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: 2K

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

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

Replies: 6

Views: 2K

Graduate The shape of what we can observe?

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

Replies: 1

Views: 1K

Graduate Other Theorys for the beginning of the Universe?

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

Replies: 1

Views: 2K

Graduate Missing Matter Problem and Galactic Flows

Mar 5, 2015 · Replies 40 · Mar 9, 2015

2

Replies: 40

Views: 5K

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 Required backround for quantum cosmology

Mar 3, 2015 · Replies 15 · Mar 8, 2015

Replies: 15

Views: 2K

Graduate How to Calculate Rotation Curves for a Spiral Galaxy?

Mar 3, 2015 · Replies 2 · Mar 8, 2015

Replies: 2

Views: 2K

Graduate Is there a subtle symmetry that may not apply in an infinite universe?

Mar 5, 2015 · Replies 7 · Mar 7, 2015

Replies: 7

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

Graduate Why must singularities create an entire universe?

Mar 6, 2015 · Replies 8 · Mar 6, 2015

Replies: 8

Views: 2K

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 Why decaying false-vacuum necessary for inflation?

Mar 5, 2015 · Replies 7 · Mar 6, 2015

Replies: 7

Views: 3K

Undergrad Astronomers Observe Supernova & Find They’re Watching Reruns

Mar 5, 2015 · Replies 2 · Mar 6, 2015

Replies: 2

Views: 1K

Graduate Is Dark Matter Truly Dark or Invisible and Can it Form Crystalline Structures?

Feb 26, 2015 · Replies 16 · Mar 6, 2015

Replies: 16

Views: 2K

Graduate Calculating Orbital Pathways with Ellipses and Rosettes

Mar 5, 2015 · Replies 2 · Mar 6, 2015

Replies: 2

Views: 1K

Graduate Are all universes the same age in the Multiverse?

Mar 5, 2015 · Replies 4 · Mar 5, 2015

Replies: 4

Views: 2K

Graduate Cosmological principles and their results

Mar 5, 2015 · Replies 3 · Mar 5, 2015

Replies: 3

Views: 1K

Jupiter's Moons - A Night of Stargazing from Romania

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

Replies: 10

Views: 4K

Graduate Is the Universe Flat or Closed According to WMAP Data?

Mar 4, 2015 · Replies 7 · Mar 4, 2015

Replies: 7

Views: 2K

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 Closest mass to the line of sight

Mar 3, 2015 · Replies 2 · Mar 4, 2015

Replies: 2

Views: 1K

Graduate Is the Boltzmann Brains Problem a Challenge for Eternal Inflation Cosmology?

Mar 3, 2015 · Replies 6 · Mar 4, 2015

Replies: 6

Views: 2K

Graduate Can Black Holes Be Utilized for Practical Purposes?

Feb 27, 2015 · Replies 9 · Mar 4, 2015

Replies: 9

Views: 2K

Graduate Acceleration a Function of Density, yet Density is Constant?

Mar 1, 2015 · Replies 16 · Mar 4, 2015

Replies: 16

Views: 2K

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: 16K

Graduate Why "Dark Energy density" instead of CC?

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

Replies: 24

Views: 2K

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

Graduate Is the Universe Still Expanding Faster Than the Speed of Light?

Feb 28, 2015 · Replies 19 · Mar 3, 2015

Replies: 19

Views: 2K

Graduate What is the Universe expanding into?

Feb 27, 2015 · Replies 6 · Mar 3, 2015

Replies: 6

Views: 2K

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

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.

Top