Astronomy and Astrophysics Forum

Post thread
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.
Undergrad Navigation through the Asteroid belt
  • · Replies 4 ·
Replies
4
Views
5K
Graduate Radiation condensing into matter?
  • · Replies 9 ·
Replies
9
Views
6K
Graduate Could stronger gravity replace dark matter?
  • · Replies 12 ·
Replies
12
Views
4K
Graduate How Does Dark Matter Influence the Spin of Galaxies Compared to Solar Systems?
  • · Replies 5 ·
Replies
5
Views
3K
High School Earth's Path: Why Ellipse? - How Come, Why Not Circular Motion?
  • · Replies 6 ·
Replies
6
Views
4K
High School What is the time of perihelion for different planets?
  • · Replies 1 ·
Replies
1
Views
3K
Stargazing When was the first telescope used to view the stars?
  • · Replies 4 ·
Replies
4
Views
4K
Graduate Celestial Mass Accretion Spectrum
  • · Replies 1 ·
Replies
1
Views
2K
Graduate MOND paper says Bullet Cluster poses problems for Lambda-CDM
  • · Replies 2 ·
Replies
2
Views
3K
Undergrad Is there a perfect vacuum between atoms in space?
  • · Replies 55 ·
2
Replies
55
Views
17K
Graduate Why Do M-Type Stars Exhibit More Diverse Spectral Lines Than O-Type Stars?
  • · Replies 2 ·
Replies
2
Views
3K
Undergrad Question about atmospheric pressure
  • · Replies 7 ·
Replies
7
Views
7K
Graduate What's the easiest way to move a star?
  • · Replies 12 ·
Replies
12
Views
6K
Undergrad What Causes the Lines in the Spectrum of a Star?
  • · Replies 7 ·
Replies
7
Views
4K
Undergrad Physics of Propulsion: Learn About Space Travel Tech
  • · Replies 2 ·
Replies
2
Views
3K
Undergrad Line of sight and star density question.
  • · Replies 3 ·
Replies
3
Views
4K
Graduate Sign convention of bolometric correction
  • · Replies 3 ·
Replies
3
Views
4K
Graduate Is Gravity Faster Than Light in Black Holes?
  • · Replies 9 ·
Replies
9
Views
4K
Undergrad Earth's Spin & Moon: Impact on Rotation
  • · Replies 1 ·
Replies
1
Views
3K
Undergrad Type Ia Supernovae: Fusion Explosion Explained
  • · Replies 33 ·
2
Replies
33
Views
8K
High School Mystery of the Moon's Rotation: Investigating Comet Impacts
  • · Replies 25 ·
Replies
25
Views
5K
Undergrad Difference between theoretical astrophysics and theoretical physics
  • · Replies 1 ·
Replies
1
Views
7K
High School Why Did They Place the Lunar Laser Reflector on the Moon's Near Side?
  • · Replies 12 ·
Replies
12
Views
3K
Graduate Gravitational component of light and neutrinos in the universe
  • · Replies 3 ·
Replies
3
Views
3K
Undergrad Where is Taurus in Relation to the Sun's Orbit in the Milky Way?
  • · Replies 4 ·
Replies
4
Views
7K
High School What are the shapes of orbits that exist in our solar system
  • · Replies 9 ·
Replies
9
Views
7K
Undergrad Understanding Quasars & Blazars: Definition & Theory
  • · Replies 2 ·
Replies
2
Views
4K
Graduate Why is dark matter distributed in a web rather than falling into clumps ?
  • · Replies 9 ·
Replies
9
Views
4K
Artistic or Computer Generated Astronomy Images?
  • · Replies 4 ·
Replies
4
Views
2K
High School How Do You Calculate Acceleration and Distance of a Free-Falling Object?
  • · Replies 4 ·
Replies
4
Views
3K
Graduate Calculating Acceleration of Stellar Engines: A Comparison to Wikipedia Example
  • · Replies 5 ·
Replies
5
Views
3K
Graduate Is Every Point in the Universe the Center?
  • · Replies 47 ·
2
Replies
47
Views
10K
Undergrad Shouldn’t ice on comets burn up quickly?
  • · Replies 11 ·
Replies
11
Views
14K
Graduate How Can We Observe the Oldest and Most Distant Object in the Universe?
  • · Replies 12 ·
Replies
12
Views
5K
Graduate Evidence of inexistence in black holes?
  • · Replies 9 ·
Replies
9
Views
4K
Undergrad Trying to wrap my brain around gravitational assists
  • · Replies 7 ·
Replies
7
Views
3K
Undergrad Is 0.026 the Key to Unveiling a New Exoplanet's Characteristics?
  • · Replies 3 ·
Replies
3
Views
7K
Graduate Are Orbits of Close Binary Stars Truly Circular?
  • · Replies 4 ·
Replies
4
Views
3K
Undergrad Calculating Orbital Velocity Ratios for Planets A and B
  • · Replies 2 ·
Replies
2
Views
9K
High School What causes tidal gravitational forces?
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad Small, rocky extrasolar planet discovered
  • · Replies 1 ·
Replies
1
Views
3K
High School Gravitational Force: What Keeps Two Bodies From Colliding?
  • · Replies 1 ·
Replies
1
Views
1K
Graduate Boltzman Equation: Exploring the Probability of Atomic Levels in Stars
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Particle Astrophysics: What Is It?
  • · Replies 3 ·
Replies
3
Views
4K
Stargazing Astronomy binoculars like the Celestron Skymaster 20x80?
  • · Replies 3 ·
Replies
3
Views
1K
Graduate How is the Energy of a Star's Atoms Calculated and Related to its Temperature?
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad Understanding Orbital Mechanics and the Concept of Sustained Circular Orbit
  • · Replies 5 ·
Replies
5
Views
3K
Stargazing Objects Visible with Telescope & CCD Camera - Focal Length 100 cm
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Is the sun a black hole for low frequency radiation?
  • · Replies 5 ·
Replies
5
Views
3K
Graduate How to change a star's luminosity
  • · Replies 4 ·
Replies
4
Views
4K
Graduate Maximizing Telescope Performance: Evaluating Apparent Field with CCD Camera
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad Does Light Take Longer to Reach Us Through a Gravitational Lens?
  • · Replies 4 ·
Replies
4
Views
2K
High School Ecliptic, Celestial equator and horizon?
  • · Replies 3 ·
Replies
3
Views
14K
Graduate Redshift and Universal Expansion
  • · Replies 6 ·
Replies
6
Views
4K
Graduate Why doesn't dark matter fall into black holes ?
  • · Replies 4 ·
Replies
4
Views
5K
Graduate Inhabiting gaseus planets (such as Jupiter,
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Is expansion a result of gravity?
  • · Replies 3 ·
Replies
3
Views
2K
Graduate What's a natal kick in reference to astrophysics?
  • · Replies 2 ·
Replies
2
Views
5K
Graduate Matter Falling to a Black Hole's Event Horizon
  • · Replies 5 ·
Replies
5
Views
4K
Graduate How long does it take a black hole to gain seven billion solar masses?
  • · Replies 11 ·
Replies
11
Views
5K
Graduate Consequences of Chicxulub impact
  • · Replies 26 ·
Replies
26
Views
8K
Undergrad In which direction in the sky are we headed?
  • · Replies 10 ·
Replies
10
Views
8K
Graduate What is the trigonometric parallax of a binary system?
  • · Replies 4 ·
Replies
4
Views
3K
Graduate How Large Could a Virga-Style Enclosure Be Before Collapsing?
  • · Replies 4 ·
Replies
4
Views
4K
Graduate How Do Atoms in Collapsing Stars Remain Stable Before Becoming Singularities?
  • · Replies 3 ·
Replies
3
Views
3K
Undergrad Extraterrestrial sky color based on atmospheric composition and sun color
  • · Replies 4 ·
Replies
4
Views
9K
High School Physics In Space Assignment - Year 12
  • · Replies 1 ·
Replies
1
Views
3K
Graduate What is Accretion Induced Collapse and its Relationship with Type IA Supernovae?
  • · Replies 4 ·
Replies
4
Views
2K
Graduate Does logic hold true outside our reality (spacetime)?
  • · Replies 3 ·
Replies
3
Views
3K
Undergrad What is the Angular Extent of Trigonometric Parallax?
  • · Replies 4 ·
Replies
4
Views
12K
Undergrad E-Classifying Orbits: Learn How to Numerically Categorize Orbits
  • · Replies 2 ·
Replies
2
Views
2K
The Pale Blue Dot: Reflecting on Our Place in the Universe
  • · Replies 3 ·
Replies
3
Views
3K
Undergrad Calculating Acceleration Due to Gravity in a Galaxy
  • · Replies 1 ·
Replies
1
Views
3K
Graduate 'Normal universe' a special case?
  • · Replies 11 ·
Replies
11
Views
3K
Undergrad Planets Surviving Black Hole Formation: A Scientific Inquiry
  • · Replies 27 ·
Replies
27
Views
10K
Undergrad Retrograde Motion: How Tilting of Moon Affects Revolution
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Equation Help: Gravitationally Bound Rubble Pile Asteroid Orbit
  • · Replies 3 ·
Replies
3
Views
3K
Undergrad Where can I find theoretical isochrones?
  • · Replies 2 ·
Replies
2
Views
3K
Graduate Understanding Solar Radiation Force: Maths & Derivation
  • · Replies 1 ·
Replies
1
Views
3K
Need helping comming up with an Astronomy Project - Its open to anything ?
  • · Replies 6 ·
Replies
6
Views
2K
Graduate Bad astronomy in massive star luminosity
  • · Replies 24 ·
Replies
24
Views
7K
Graduate Is Gravitomagnetism attractive does it have important long range attraction?
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Theorize Possible Colonization on Europa
  • · Replies 9 ·
Replies
9
Views
5K
Undergrad Evidence that the Universe is Expanding?
  • · Replies 5 ·
Replies
5
Views
6K
Undergrad Find FWHM: Pixel Values, Gaussian Curve, Standard Deviation
  • · Replies 3 ·
Replies
3
Views
6K
Undergrad How many pages of astrophysics textbooks can you absorb in a day?
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Wormhole Creation: Theoretical Methods and Questions
  • · Replies 16 ·
Replies
16
Views
18K
High School What is the Earth's orbital speed around the sun?
  • · Replies 10 ·
Replies
10
Views
2K
Stargazing What did the January 4th, 2010 eclipse look like?
  • · Replies 2 ·
Replies
2
Views
3K
Undergrad Why does the Moon orbit the Earth rather than the Sun?
  • · Replies 6 ·
Replies
6
Views
17K
High School Is Betelgeuse Really Over 100,000 Times Brighter Than the Sun?
  • · Replies 1 ·
Replies
1
Views
3K
Graduate Is There a Connection Between Black Hole Density and Galaxy Size?
  • · Replies 4 ·
Replies
4
Views
4K
High School Did Mercury and Gemini use the same capsule?
  • · Replies 4 ·
Replies
4
Views
4K
Graduate Proof that our solar system will leave the milky way.
  • · Replies 7 ·
Replies
7
Views
6K
Graduate Black Holes: growth affected by Higgs or Dark energy/matter
  • · Replies 3 ·
Replies
3
Views
3K
Graduate How generalizable is simulation/model research?
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad Can Black Holes Actually Emit Radiation?
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad When was Dark Matter Proposed After the Big Bang?
  • · Replies 4 ·
Replies
4
Views
2K
Undergrad Why Aren't Concrete Spacers Required In Foundations?
  • · Replies 1 ·
Replies
1
Views
5K
Graduate How Do Coiled Magnetic Fields in Black Holes Create Jets?
  • · Replies 1 ·
Replies
1
Views
3K