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.
Graduate Measuring the temperature of quasars
  • · Replies 2 ·
Replies
2
Views
4K
Undergrad Calculating Absolute Magnitude of a Star - Red's Help
  • · Replies 1 ·
Replies
1
Views
3K
Graduate Could Dark Matter be mass in EM fields?
  • · Replies 7 ·
Replies
7
Views
3K
Solve Your HR Diagram Problem with Expert Help - Tuugii
  • · Replies 3 ·
Replies
3
Views
3K
Undergrad Advantage of measuring stellar parallaxes from Mars rather than Earth?
  • · Replies 2 ·
Replies
2
Views
4K
Graduate If blackholes, then antiblackholes?
  • · Replies 2 ·
Replies
2
Views
3K
How do i find a Astronomy club close to me ?
  • · Replies 2 ·
Replies
2
Views
3K
Undergrad Satellite Right Acension and Declination Calculations
  • · Replies 4 ·
Replies
4
Views
9K
Undergrad Are matter and energy equally represented
  • · Replies 2 ·
Replies
2
Views
2K
Stargazing Finding the Perfect Telescope for First-Time Buyers
  • · Replies 4 ·
Replies
4
Views
2K
Stargazing Why Do Telescopes Have Long Focal Lengths?
  • · Replies 11 ·
Replies
11
Views
4K
Graduate Can Particle-Antiparticle Pairs Form Stable Unions?
  • · Replies 3 ·
Replies
3
Views
4K
Graduate Radiative transfer to space affected by atmosphere?
  • · Replies 3 ·
Replies
3
Views
3K
Graduate Cosmological relativity theories
  • · Replies 3 ·
Replies
3
Views
5K
Star Threatens Earth: Is it Real?
  • · Replies 4 ·
Replies
4
Views
3K
Undergrad Measuring Distance: How Far Are Stars?
  • · Replies 3 ·
Replies
3
Views
4K
Appearance of the lakes on Titan
  • · Replies 2 ·
Replies
2
Views
3K
High School Gravity Anomaly: What Could Be Causing It?
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Can Information Really Be Lost in Black Holes and Our Minds?
  • · Replies 15 ·
Replies
15
Views
7K
Graduate Can an observer entering a black hole reach the end of time?
  • · Replies 3 ·
Replies
3
Views
3K
Who Can Help Me Customize My New MySpace Page?
  • · Replies 78 ·
3
Replies
78
Views
10K
Graduate Is the Drake Equation Still Relevant in Today's Rapidly Advancing Technology?
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad Would you expect comets to follow the ecliptic? Explain.
  • · Replies 2 ·
Replies
2
Views
3K
Undergrad Where Can I Find the Radial Velocity of the Sun Relative to Earth?
  • · Replies 5 ·
Replies
5
Views
14K
Graduate Gravity as consequence of universe expansion
  • · Replies 4 ·
Replies
4
Views
5K
Undergrad Unveiling the Mystery: The Birth of Stars and the Role of Nuclear Fusion
  • · Replies 5 ·
Replies
5
Views
3K
Graduate Pioneer Anomaly: Unravelling Physics' Mysteries
  • · Replies 65 ·
3
Replies
65
Views
17K
GRAVITAS GRAVITAS: Portraits of a Universe in Motion - Freely Available
  • · Replies 5 ·
Replies
5
Views
3K
Graduate Trajectory of a Test Particle in a Semidetached Binary
  • · Replies 1 ·
Replies
1
Views
3K
Undergrad Do Planets' Magnetic Fields Depend on Their Composition?
  • · Replies 3 ·
Replies
3
Views
3K
Undergrad Rotation period vs. mass of planets in solar system
  • · Replies 7 ·
Replies
7
Views
9K
Undergrad What caused the cooling of the universe?
  • · Replies 16 ·
Replies
16
Views
8K
Undergrad Sun rotation difference (equator/latitude/pole)?
  • · Replies 5 ·
Replies
5
Views
10K
Undergrad Earth's Orbit Change: Impact on Life - Will We Die?
  • · Replies 3 ·
Replies
3
Views
3K
Graduate What is the Wavelength of Hawking Radiation?
  • · Replies 8 ·
Replies
8
Views
6K
Graduate How Do You Convert Monochromatic Flux Between Wavelength and Frequency Units?
  • · Replies 1 ·
Replies
1
Views
5K
Undergrad Would Two Identical Planets Opposite Each Other Coalesce Over Time?
  • · Replies 4 ·
Replies
4
Views
3K
Stargazing How to Buy a Telescope for Under $150?
  • · Replies 9 ·
Replies
9
Views
4K
High School Why does anything with mass have it's own gravitational field?
  • · Replies 20 ·
Replies
20
Views
6K
Graduate Quantum Cosmology Evidence: String, Brane & LQC
  • · Replies 1 ·
Replies
1
Views
3K
Graduate Can Black Holes Explode Back into Normal Matter After Evaporation?
  • · Replies 2 ·
Replies
2
Views
3K
Graduate How does black hole evaporation end?
  • · Replies 9 ·
Replies
9
Views
5K
Graduate Stellar Evolution: Pathways & Perturbations
  • · Replies 1 ·
Replies
1
Views
3K
Graduate The Boltzmann distribution of uniformly spaced energy levels
  • · Replies 2 ·
Replies
2
Views
8K
Graduate What is the maximum gravity gradient a human can tolerate near a black hole?
  • · Replies 25 ·
Replies
25
Views
13K
High School Stars twinkle, but planets don't?
  • · Replies 1 ·
Replies
1
Views
8K
High School What is the difference between cosmology and astrophysics
  • · Replies 6 ·
Replies
6
Views
5K
Stargazing Total eclipse of the moon tonight.
  • · Replies 76 ·
3
Replies
76
Views
13K
Stargazing Catching the Eclipse Last Night: A Tale of Cold and Clear Skies
  • · Replies 11 ·
Replies
11
Views
4K
High School What causes gravity? Is it mass or weight?
  • · Replies 15 ·
Replies
15
Views
5K
Undergrad Can Gravity Really Repel? Understanding Gravitons and Common Misconceptions
  • · Replies 31 ·
2
Replies
31
Views
30K
Shooting the moon. did i get a space station?
  • · Replies 2 ·
Replies
2
Views
3K
Graduate How Does Solid Hydrogen Influence Astrophysics?
  • · Replies 2 ·
Replies
2
Views
5K
Graduate What are the mysteries of the Big Bang and the universe's expansion?
  • · Replies 27 ·
Replies
27
Views
6K
High School Research Help: Get Info on 9 Planets
  • · Replies 3 ·
Replies
3
Views
3K
Graduate The spectrum of reflected light from a planet question.
  • · Replies 3 ·
Replies
3
Views
6K
High School Ultimate fate of ISS (International Space Station)
  • · Replies 5 ·
Replies
5
Views
5K
Undergrad The Milky Way is twice the size we thought it was
  • · Replies 2 ·
Replies
2
Views
3K
Undergrad Protecting Craft from Solar Wind: How Far Does Our Magnetic Field Reach?
  • · Replies 2 ·
Replies
2
Views
4K
Undergrad Human in outer space without space suit
  • · Replies 20 ·
Replies
20
Views
25K
Graduate Dark matter and the Standard Model
  • · Replies 17 ·
Replies
17
Views
6K
Undergrad Is Dark Matter Just Unseen Molecules?
  • · Replies 12 ·
Replies
12
Views
5K
Graduate How Can Astrophysicists Be Rescued from Mars Using Special Relativity?
  • · Replies 8 ·
Replies
8
Views
4K
Graduate SETI: What would it take to monitor all probable bands.
  • · Replies 4 ·
Replies
4
Views
3K
High School Mastering Optical Depth: Simplifying the Concept for Beginners
  • · Replies 10 ·
Replies
10
Views
3K
How Can We Improve Our Community Together?
  • · Replies 4 ·
Replies
4
Views
3K
Graduate What Happens to Matter Before a Black Hole Collapses?
  • · Replies 5 ·
Replies
5
Views
3K
Do You Believe in the Big Rip Theory?
  • · Replies 3 ·
Replies
3
Views
3K
Graduate Is dark matter essential for understanding galaxy interactions in clusters?
  • · Replies 3 ·
Replies
3
Views
5K
Graduate Understanding Schwarzschild Radius Formula & Escape Velocity Calculation
  • · Replies 1 ·
Replies
1
Views
6K
Graduate What is the radial density distribution of a neutron star?
  • · Replies 3 ·
Replies
3
Views
6K
Graduate Does Our Velocity Relative to the Black Hole Affect the Passage of Time?
  • · Replies 2 ·
Replies
2
Views
3K
Graduate How to set moon free of its orbit
  • · Replies 16 ·
Replies
16
Views
5K
Graduate Planets & Moons Orbit: Earth, Uranus, Neptune, Jupiter, Mars, Pluto, etc.
  • · Replies 1 ·
Replies
1
Views
8K
Graduate Solving Orbital Plane Alignment of Two Planets
  • · Replies 3 ·
Replies
3
Views
6K
Graduate Are Alternative Explanations for Dark Matter Being Overlooked?
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad Can Gamma Rays Reveal Their Source?
  • · Replies 5 ·
Replies
5
Views
3K
Undergrad Estimating Photon Escape Time from Center of Sun
  • · Replies 2 ·
Replies
2
Views
3K
Graduate Neutron degenerate matter as dark matter
  • · Replies 4 ·
Replies
4
Views
7K
Undergrad Creating a Planet of Sky and Clouds: Is it Possible?
  • · Replies 3 ·
Replies
3
Views
4K
Graduate Hubble Expansion: Moon Orbital Distance & Error Check
  • · Replies 3 ·
Replies
3
Views
3K
Undergrad Is it possible to create Orbital construction yards for Spaceships?
  • · Replies 6 ·
Replies
6
Views
5K
What Would Happen if the Earth's Axis was Vertical to the Solar System?
  • · Replies 7 ·
Replies
7
Views
6K
Graduate When a supernova occurs is it expected that the gravity wave
  • · Replies 3 ·
Replies
3
Views
6K
High School Can Low-Cost Methods Be Used to Launch Objects into Orbit?
  • · Replies 3 ·
Replies
3
Views
3K
Undergrad Pulsars vs. Brown Dwarves & Blue Giants: A Celestial Q&A
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad What happens when one's gravity attracts the other?
  • · Replies 7 ·
Replies
7
Views
3K
Stargazing What Size and Material Should I Use for My Refractor Telescope Tube?
  • · Replies 1 ·
Replies
1
Views
4K
Graduate (problem) Spherical trigonometry and star declination
  • · Replies 4 ·
Replies
4
Views
12K
Stargazing Can we see human history through a telescope?
  • · Replies 5 ·
Replies
5
Views
5K
Graduate Dimensional analysis on Luminosity
  • · Replies 6 ·
Replies
6
Views
5K
Stargazing Optic Quality and Useful Magnification of the Orion Skyview Pro 6 Telescope
  • · Replies 17 ·
Replies
17
Views
7K
Graduate How Does Heat Transfer Occur in Neutron Stars?
  • · Replies 1 ·
Replies
1
Views
3K
Stargazing Can i use a watch glass as a primary mirror of dobsonian telescope?
  • · Replies 2 ·
Replies
2
Views
3K
Undergrad Applying Runge-Kutta(RK4) method to planetary velocity
  • · Replies 9 ·
Replies
9
Views
10K
High School Can Dark Matter and Black Holes be Associated in Earth's Rotation?
  • · Replies 55 ·
2
Replies
55
Views
16K
Stargazing Magnification of dobsonian telescope
  • · Replies 1 ·
Replies
1
Views
3K
Graduate Calculating Optical Interferometry Telescope Resolution
  • · Replies 2 ·
Replies
2
Views
4K
Graduate Black Hole Temperature and Entropy
  • · Replies 5 ·
Replies
5
Views
18K
Undergrad Analemma Visualisation: 3D Graphics & Visualisations
  • · Replies 1 ·
Replies
1
Views
4K