Astronomy, Astrophysics, Cosmology Forum

Post thread
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.
Graduate Is There a Gravitational Spectrum for Measuring Wavelengths?
  • · Replies 3 ·
Replies
3
Views
3K
Graduate Can Information Really Be Lost in Black Holes and Our Minds?
  • · Replies 15 ·
Replies
15
Views
8K
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
Graduate Carbon dust mistaken for Dark Energy all this time?
  • · Replies 2 ·
Replies
2
Views
4K
Undergrad Would you expect comets to follow the ecliptic? Explain.
  • · Replies 2 ·
Replies
2
Views
3K
Graduate Birth of Planetary Systems: Starless Possible?
  • · 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
Undergrad Galactic Structure: Do Astrophysicists See Stars Where They Are Now?
  • · Replies 1 ·
Replies
1
Views
3K
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
18K
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
4K
Graduate Can objects in space appear to move backwards in time?
  • · Replies 3 ·
Replies
3
Views
3K
Undergrad Rotation period vs. mass of planets in solar system
  • · Replies 7 ·
Replies
7
Views
9K
Graduate Can Negative Energy Keep Wormholes Open in the Theory of Inflation?
  • · Replies 2 ·
Replies
2
Views
4K
Undergrad What caused the cooling of the universe?
  • · Replies 16 ·
Replies
16
Views
9K
Undergrad Sun rotation difference (equator/latitude/pole)?
  • · Replies 5 ·
Replies
5
Views
10K
Graduate Fecund Universe Theory: How Different Are Baby Universes?
  • · Replies 1 ·
Replies
1
Views
4K
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
7K
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 Giant ropes of dark matter found in new sky survey
  • · Replies 1 ·
Replies
1
Views
3K
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
14K
Stargazing Catching the Eclipse Last Night: A Tale of Cold and Clear Skies
  • · Replies 11 ·
Replies
11
Views
5K
High School What causes gravity? Is it mass or weight?
  • · Replies 15 ·
Replies
15
Views
6K
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
6K
Graduate What are the mysteries of the Big Bang and the universe's expansion?
  • · Replies 27 ·
Replies
27
Views
7K
Graduate Are Singularities in the Universe Possible?
  • · Replies 13 ·
Replies
13
Views
7K
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
Graduate Redshift Issues: Understanding the Light-Metric Coupling in Cosmology
  • · Replies 13 ·
Replies
13
Views
4K
Graduate Hubble expansion inside a contracting supercluster
  • · Replies 24 ·
Replies
24
Views
8K
High School Ultimate fate of ISS (International Space Station)
  • · Replies 5 ·
Replies
5
Views
5K
Undergrad What Would Happen if Earth and a Black Hole Interacted?
  • · Replies 10 ·
Replies
10
Views
4K
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
Graduate What causes the universe to eventually colapse?
  • · Replies 12 ·
Replies
12
Views
4K
Graduate Can Higgs Particles Cause Universe Expansion Due to Negative Density?
  • · Replies 3 ·
Replies
3
Views
5K
Undergrad Human in outer space without space suit
  • · Replies 20 ·
Replies
20
Views
26K
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 A few questions =] (time and big bang)
  • · Replies 9 ·
Replies
9
Views
4K
Graduate How Can Astrophysicists Be Rescued from Mars Using Special Relativity?
  • · Replies 8 ·
Replies
8
Views
4K
Graduate Dark energy a furphy, says new paper
  • · Replies 50 ·
2
Replies
50
Views
11K
Is Big Bang the Funniest Show Ever?
  • · Replies 17 ·
Replies
17
Views
5K
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
Graduate Galaxy from 700 million year old universe
  • · Replies 1 ·
Replies
1
Views
3K
Undergrad What is Vacuum Energy & How Does It Exist?
  • · Replies 1 ·
Replies
1
Views
3K
Graduate Could the Universe Have Expanded Immediately After the Big Bang?
  • · Replies 18 ·
Replies
18
Views
6K
Undergrad Travelling more than Speed of light
  • · Replies 8 ·
Replies
8
Views
5K
Is Humanity Truly Unique in the Universe?
  • · Replies 21 ·
Replies
21
Views
5K
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
Undergrad Is there any proof that big bang actually happened ?
  • · Replies 15 ·
Replies
15
Views
17K
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 Are there cosmological models in which Planck's constant varies?
  • · Replies 28 ·
Replies
28
Views
9K
Graduate Does Our Velocity Relative to the Black Hole Affect the Passage of Time?
  • · Replies 2 ·
Replies
2
Views
3K
Graduate Is the Cosmological Arrow of Time Linked to the Thermodynamic Arrow of Time?
  • · Replies 1 ·
Replies
1
Views
4K
Undergrad Understanding Wavelength, Energy, & Temperature
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Measuring Red Shift to Confirm Hubble Flow
  • · Replies 15 ·
Replies
15
Views
7K
Graduate Planck energy is a max, is there a mimimum too?
  • · Replies 12 ·
Replies
12
Views
5K
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
High School Is the Universe Expanding or Are Galaxies Just Moving Apart?
  • · Replies 4 ·
Replies
4
Views
3K
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
Graduate What Is the Universe Expanding Into?
  • · Replies 88 ·
3
Replies
88
Views
72K
Undergrad Estimating Photon Escape Time from Center of Sun
  • · Replies 2 ·
Replies
2
Views
4K
Graduate Cosmological constant as a fluid
  • · Replies 1 ·
Replies
1
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 Reconciling the Paradox of Age and Size in a Finite Universe
  • · Replies 9 ·
Replies
9
Views
5K
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
4K
Graduate WMAP 2006 - Mainstream model parameters
  • · Replies 3 ·
Replies
3
Views
3K