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.
How can superconductors be used to protect spaceships from radiation in space?
  • · Replies 5 ·
Replies
5
Views
2K
Neutron Star Collapse: Q&A on Physics and Observation
  • · Replies 9 ·
Replies
9
Views
3K
Creation of spinning neutron stars and pulsars
  • · Replies 5 ·
Replies
5
Views
2K
Gravitational Interferometer and Kalman
  • · Replies 9 ·
Replies
9
Views
4K
Planets collapsing into black holes?
  • · Replies 4 ·
Replies
4
Views
2K
Inside a black hole, looking out
  • · Replies 16 ·
Replies
16
Views
3K
Book recommendation on Binary systems
  • · Replies 1 ·
Replies
1
Views
1K
Calculating Luminosity from Brightness: Where Did I Go Wrong?
  • · Replies 2 ·
Replies
2
Views
2K
The 15 Million Degree Pinhead: The Sun's Core Materialized on Earth
  • · Replies 18 ·
Replies
18
Views
24K
Percentage of Matter, Dark Matter and Baryonic Matter
  • · Replies 9 ·
Replies
9
Views
6K
Discovering Earth's View from Epsilon Indi: Answers by Chinspinner
  • · Replies 10 ·
Replies
10
Views
2K
What are the atoms floating in space
  • · Replies 1 ·
Replies
1
Views
3K
Three Important Questions (about black holes and the Big Bang)
  • · Replies 11 ·
Replies
11
Views
3K
Do Some Stars Possess A Particular Name?
  • · Replies 9 ·
Replies
9
Views
2K
Are there any caves on the Moon?
  • · Replies 18 ·
Replies
18
Views
3K
Sign swapping - spacelike intervals
  • · Replies 3 ·
Replies
3
Views
1K
Measuring the Movement of the Stars
  • · Replies 3 ·
Replies
3
Views
2K
How to Identify Polar Day and Night Seasons?
  • · Replies 10 ·
Replies
10
Views
2K
Direction in Space: Do We Launch Straight Up from the North and South Poles?
  • · Replies 3 ·
Replies
3
Views
1K
What is Stellar Flux and How Does it Affect Solar Wind?
  • · Replies 3 ·
Replies
3
Views
14K
Has Anyone Played Space Engineers?
  • · Replies 1 ·
Replies
1
Views
3K
Why does surface area of an Event Horizon increase?
  • · Replies 6 ·
Replies
6
Views
2K
Sagittarius A* and its event horizon
  • · Replies 5 ·
Replies
5
Views
4K
Question about Space -- Is Space itself a 4th dimensional object?
  • · Replies 7 ·
Replies
7
Views
2K
Witnessing Geminids: Slower Meteor Shower Speed
  • · Replies 4 ·
Replies
4
Views
2K
Entering a black hole theoretically of course
  • · Replies 26 ·
Replies
26
Views
4K
How Does Entropy Influence Hawking Radiation in Black Holes?
  • · Replies 3 ·
Replies
3
Views
2K
Finite Universe: Viewing All Timelines of the Universe
  • · Replies 7 ·
Replies
7
Views
2K
Accumulated environmental damage to Hubble main mirror
  • · Replies 2 ·
Replies
2
Views
1K
Latest Smoothed Sunspot Number posted 8 Dec '14 at SWPC
  • · Replies 2 ·
Replies
2
Views
2K
Sgr. A* - Mathematical calculations
  • · Replies 5 ·
Replies
5
Views
2K
How to Calculate the Distance Between Mars and Earth?
  • · Replies 12 ·
Replies
12
Views
3K
Capturing Stars with Mobile Devices: Fact or Fiction?
  • · Replies 5 ·
Replies
5
Views
1K
Did Biosphere 2 make any discoveries later used on manned spaceflight missions?
  • · Replies 2 ·
Replies
2
Views
1K
Power in Sun's Core: Comparing 10^26 W to 276 W/m^3
  • · Replies 31 ·
2
Replies
31
Views
5K
Why does the Soyuz cover its main engine?
  • · Replies 3 ·
Replies
3
Views
2K
Why doesn't ISS pass over the polar regions?
  • · Replies 1 ·
Replies
1
Views
2K
Understanding Hawking Radiation: Energy Subtracted from Black Holes
  • · Replies 3 ·
Replies
3
Views
2K
Why Is Asteroid Composition Highly Varied?
  • · Replies 9 ·
Replies
9
Views
4K
Why is the Solar System Flat Instead of Spherical Like Atomic Structures?
  • · Replies 14 ·
Replies
14
Views
3K
Uncertainty of planetary orbital period
  • · Replies 2 ·
Replies
2
Views
4K
Why if we put Saturn in water, it will float?
  • · Replies 3 ·
Replies
3
Views
2K
Find the mass of a black hole from just its radius?
  • · Replies 6 ·
Replies
6
Views
2K
The Fascinating Ponzo Illusion: How Our Brain Distorts the Size of the Moon
  • · Replies 1 ·
Replies
1
Views
1K
Is the Neutron Intermediary Decay W- Boson Related to Gravitational Effects?
  • · Replies 32 ·
2
Replies
32
Views
3K
How Much Declination Do Stars Need for a Luck City at Latitude 35°?
  • · Replies 2 ·
Replies
2
Views
1K
Would We See Solar Events Speed Up While Traveling to the Sun?
  • · Replies 19 ·
Replies
19
Views
2K
Escaping earth's atmosphere with a balloon
  • · Replies 8 ·
Replies
8
Views
5K
Does the Solar System spin around an axis and if so where is it?
  • · Replies 17 ·
Replies
17
Views
4K
Is Interstellar Travel Possible with Current Propulsion Technology?
  • · Replies 3 ·
Replies
3
Views
1K
Best Camera for deep space object
  • · Replies 5 ·
Replies
5
Views
2K
Is Spacetime Flat? Answers to Orbit Questions
  • · Replies 13 ·
Replies
13
Views
5K
How can black holes have electrical charge, and spin?
  • · Replies 5 ·
Replies
5
Views
2K
Why Stars Explode: Examining the Physics Behind Supernovas
  • · Replies 9 ·
Replies
9
Views
2K
Understanding Acceleration and its Impact on Time and Velocity - A Question
  • · Replies 9 ·
Replies
9
Views
2K
Planetary Orbits & Orbital Velocity
  • · Replies 4 ·
Replies
4
Views
3K
Could the mass of a singularity be described as an empty set
  • · Replies 13 ·
Replies
13
Views
2K
Are there any particles with all the properties of a WIMP
  • · Replies 9 ·
Replies
9
Views
2K
A few very specific questions about Venus
  • · Replies 3 ·
Replies
3
Views
2K
Apparent Birghtness And Absolute Brightness
  • · Replies 1 ·
Replies
1
Views
2K
Planet Trajectory: Why Elliptical & Circular Paths?
  • · Replies 2 ·
Replies
2
Views
2K
Centrifugal Spaceship Accelerator
  • · Replies 1 ·
Replies
1
Views
2K
Van Allen Belt: Why are electrons generally further out?
  • · Replies 1 ·
Replies
1
Views
2K
Variations Séculaires des Orbites PlanétairesVSDOP87
  • · Replies 1 ·
Replies
1
Views
986
Is there vacuum at the Event Horizon of a Black Hole?
  • · Replies 1 ·
Replies
1
Views
2K
Basic question about spacetime and matter
  • · Replies 1 ·
Replies
1
Views
972
Visual perspective at the speed of light:
  • · Replies 3 ·
Replies
3
Views
2K
Difference between orbital mechanics and astrodynamics ?
  • · Replies 2 ·
Replies
2
Views
6K
Various doubts about Black Holes
  • · Replies 20 ·
Replies
20
Views
4K
Is there any evidence for MACHOs or WIMPs being Dark Matter?
  • · Replies 1 ·
Replies
1
Views
2K
Hawking Radiation From Black Holes:
  • · Replies 10 ·
Replies
10
Views
3K
Stealth and detection in space: Continued
  • · Replies 7 ·
Replies
7
Views
2K
Is Superconductivity Related to the Qualities of Outer Space?
  • · Replies 29 ·
Replies
29
Views
4K
What are the equations explaining the mass of singularities?
  • · Replies 6 ·
Replies
6
Views
2K
About the size, brightness and distance of celestial objects
  • · Replies 11 ·
Replies
11
Views
3K
Space Cold | Why No Matter Means No Heat
  • · Replies 5 ·
Replies
5
Views
2K
If you could meet the person who is the authority on brown and white dwarfs
  • · Replies 2 ·
Replies
2
Views
1K
Can a star with thousands of solar masses be formed?
  • · Replies 11 ·
Replies
11
Views
2K
What is the role of gas density in determining friction in space?
  • · Replies 5 ·
Replies
5
Views
4K
What Factors Influence the Density of a Hydrogen Cloud in Space?
  • · Replies 3 ·
Replies
3
Views
2K
Rocky Bits in Comets: Formation from Dust?
  • · Replies 2 ·
Replies
2
Views
2K
Spectral energy distributions of white dwarfs in 47 Tucanae
  • · Replies 2 ·
Replies
2
Views
1K
CNO Cycle: Understanding the Last Reaction and the Mystery of 16O
  • · Replies 10 ·
Replies
10
Views
2K
Convection vs Radiation at the giant stage of stars
  • · Replies 3 ·
Replies
3
Views
3K
The Fastest Unbound Stars in the Universe
  • · Replies 1 ·
Replies
1
Views
2K
How Does Rosetta Maintain Its Position Relative to the Comet?
  • · Replies 8 ·
Replies
8
Views
3K
What Are Some Cool Facts About Galaxies and Stars for a School Project?
  • · Replies 6 ·
Replies
6
Views
2K
Average distance among pieces of space debris in low earth orbit?
  • · Replies 3 ·
Replies
3
Views
3K
Layman question on sun as seen from mercury
  • · Replies 3 ·
Replies
3
Views
2K
I want to spread life to space. What should I do?
  • · Replies 12 ·
Replies
12
Views
2K
Why does the sun appear to move eastwards from Earth?
  • · Replies 5 ·
Replies
5
Views
6K
Active Region AR2192 heading towards the limb
  • · Replies 2 ·
Replies
2
Views
1K
Have theories been formed yet on how to stop a black hole?
  • · Replies 29 ·
Replies
29
Views
5K
First Measurement of the Ancient Solar System's Magnetic Field
  • · Replies 1 ·
Replies
1
Views
2K
Can a Camera Be Built to See Stars in Daylight?
  • · Replies 18 ·
Replies
18
Views
8K
Is the Universe Heading Towards a Big Crunch or Eternal Expansion?
  • · Replies 1 ·
Replies
1
Views
2K
Matter at the core of neutron star
  • · Replies 6 ·
Replies
6
Views
3K
Flux --> Apparent magnitude ( only 1 source )
  • · Replies 1 ·
Replies
1
Views
2K
A Mental Conundrum -- The Big Bang & the Speed of Light
  • · Replies 8 ·
Replies
8
Views
2K
The mass of the sun at its beginning
  • · Replies 3 ·
Replies
3
Views
2K