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 Life in Vastly Different Universes
  • · Replies 2 ·
Replies
2
Views
2K
High School ~12mm EP and a barlow or just one good ~6mm EP
  • · Replies 1 ·
Replies
1
Views
954
Undergrad Which Celestial Body in the Solar System Allows a Probe to Orbit Fastest?
  • · Replies 2 ·
Replies
2
Views
2K
High School What are the best eyepieces for my new Orion XT8 telescope?
  • · Replies 14 ·
Replies
14
Views
5K
Undergrad Discovering Exoplanets: The Benefits of Studying White Dwarfs
  • · Replies 16 ·
Replies
16
Views
8K
High School How close does a spacecraft get to Tethys during a mission?
  • · Replies 1 ·
Replies
1
Views
3K
High School Why doesn't light travel infinitely fast ?
  • · Replies 37 ·
2
Replies
37
Views
7K
High School Is Andromeda Really the Nearest Galaxy to the Milky Way?
  • · Replies 1 ·
Replies
1
Views
3K
Graduate Rotation speed of a neutron star
  • · Replies 9 ·
Replies
9
Views
5K
Graduate Can We See Our Own Solar System Through Gravity's Mirror?
  • · Replies 4 ·
Replies
4
Views
2K
Stargazing Is it possible to clean a telescope mirror?
  • · Replies 3 ·
Replies
3
Views
2K
High School What Determines Planetary Speeds?
  • · Replies 6 ·
Replies
6
Views
3K
Graduate Will water or lava freeze in space, or would it be a gas?
  • · Replies 4 ·
Replies
4
Views
5K
Undergrad Why does air rush in from colder to hotter space and not vice versa?
  • · Replies 7 ·
Replies
7
Views
40K
Graduate Thermal velocity of particles in the solar corona
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad Earth as Moon of Gas Giant: Effects on Sunlight?
  • · Replies 7 ·
Replies
7
Views
4K
Graduate Orbiting the Sun beyond the Hill sphere
  • · Replies 6 ·
Replies
6
Views
4K
Graduate How precise can Doppler shift be measured in detecting exo-planets?
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Combining estimated errors (galaxy properties, observational)
  • · Replies 5 ·
Replies
5
Views
3K
Stargazing Help is needed in understanding my telescope
  • · Replies 5 ·
Replies
5
Views
4K
Graduate Can matter focus neutrinos in a supernova event?
  • · Replies 4 ·
Replies
4
Views
3K
Undergrad Creating a Equation to Destroy the Sun
  • · Replies 5 ·
Replies
5
Views
4K
Graduate A way to ripple the fabric of space?
  • · Replies 1 ·
Replies
1
Views
2K
High School Geminid meteor goes the wrong way.
  • · Replies 12 ·
Replies
12
Views
6K
Graduate Thoughts and questions about the CMBR.
  • · Replies 25 ·
Replies
25
Views
4K
Undergrad Chelyabinsk Meteor Shockwave 2/15/2013
  • · Replies 21 ·
Replies
21
Views
5K
Graduate Curious about Black hole information paradox
  • · Replies 8 ·
Replies
8
Views
3K
Undergrad Why did the Chelyabinsk Meteor Explode?
  • · Replies 9 ·
Replies
9
Views
5K
Undergrad Star collapse to form directly a black hole
  • · Replies 3 ·
Replies
3
Views
3K
Graduate Supernova remnants & neutron star
  • · Replies 6 ·
Replies
6
Views
3K
Undergrad Does Jupiters moon Io exhibit plate tectonics?
  • · Replies 1 ·
Replies
1
Views
6K
High School Is Russian meteor related to a asteroid known as 2012 DA14?
  • · Replies 10 ·
Replies
10
Views
3K
Graduate Expanding Space-time and the active vaccuum.
  • · Replies 4 ·
Replies
4
Views
2K
Graduate Nodal Precession Rates of Solar System Planets
  • · Replies 1 ·
Replies
1
Views
3K
Graduate Inflation & Quasars energy and 'fast-forward effect' ?
  • · Replies 4 ·
Replies
4
Views
3K
Graduate How Will the Universe End?
  • · Replies 2 ·
Replies
2
Views
2K
Stargazing Eyepiece for refractor telescope
  • · Replies 5 ·
Replies
5
Views
3K
Undergrad Another perspective of the Drake Equation
  • · Replies 16 ·
Replies
16
Views
4K
Undergrad Pulsars - Rotating neutron star produces EM radiation?
  • · Replies 5 ·
Replies
5
Views
3K
High School Astro Physics Project Ideas for my National Science Fair
  • · Replies 5 ·
Replies
5
Views
16K
Graduate Accelerating Galaxies: Cosmology's Unanswered Questions
  • · Replies 22 ·
Replies
22
Views
6K
High School What Do Milankovitch Cycles Reveal About Earth's Orbit?
  • · Replies 7 ·
Replies
7
Views
4K
Graduate What will be the change in celestial coordinates in 50 years?
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Is Space a Fluidic Medium?
  • · Replies 7 ·
Replies
7
Views
3K
Undergrad Possibilities of Gravitational Pull in Space Travel
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Why spacetime quantization does not prevent blackhole formation?
  • · Replies 16 ·
Replies
16
Views
4K
High School How does mercury exist in the Sun's presence.
  • · Replies 11 ·
Replies
11
Views
6K
High School Is the Earth's Core Solid or Liquid?
  • · Replies 8 ·
Replies
8
Views
4K
Undergrad Changes to day length at solstices vs. equinoxes
  • · Replies 12 ·
Replies
12
Views
25K
Graduate What sort of atmosphere could a rogue planet have?
  • · Replies 2 ·
Replies
2
Views
3K
Voyager Probes: Longevity in the Void of Interstellar Space
  • · Replies 17 ·
Replies
17
Views
8K
Is Earth the only planet fine-tuned for life?
  • · Replies 19 ·
Replies
19
Views
6K
Graduate Ripping apart baryons at the end of the universe creating new particles?
  • · Replies 3 ·
Replies
3
Views
3K
Graduate Quantum gravity in astrophysics?
  • · Replies 3 ·
Replies
3
Views
3K
Graduate Three-Body orbital simulation reference plane
  • · Replies 4 ·
Replies
4
Views
4K
Graduate Question about the universe and a black hole
  • · Replies 9 ·
Replies
9
Views
3K
Graduate Could this solar system have stable orbits.
  • · Replies 1 ·
Replies
1
Views
2K
Graduate How Does Hawking Radiation Affect Black Hole Temperature?
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Virtual particle creation in black holes
  • · Replies 4 ·
Replies
4
Views
2K
Undergrad The Effects of Dumping Nuclear Waste into the Sun
  • · Replies 38 ·
2
Replies
38
Views
14K
Graduate Question about Heliopause / radio noise
  • · Replies 6 ·
Replies
6
Views
3K
Graduate Why Was It Significant to Discover Black Hole Entropy and Temperature?
  • · Replies 3 ·
Replies
3
Views
2K
High School Which materials would survive at near absolute zero, intact?
  • · Replies 4 ·
Replies
4
Views
4K
High School Is Earth's Gravity Changing Day to Day?
  • · Replies 20 ·
Replies
20
Views
19K
High School Question on the history of calculating the orbital of planets
  • · Replies 2 ·
Replies
2
Views
2K
Graduate How Did Saturn's 2010 Storm Impact Its Atmosphere?
  • · Replies 1 ·
Replies
1
Views
3K
Undergrad Old space information, relevant conclusions?
  • · Replies 2 ·
Replies
2
Views
2K
High School Is it possible to be completely still in space?
  • · Replies 5 ·
Replies
5
Views
2K
Graduate How big bodies can exist in outer Solar System?
  • · Replies 11 ·
Replies
11
Views
5K
Graduate GRB Hypothesis for Terrestrial C14 and Be10 Spike
  • · Replies 6 ·
Replies
6
Views
3K
Undergrad The future of Radio Astronomy (your thoughts)
  • · Replies 3 ·
Replies
3
Views
3K
High School Why planets in the solar system lie almost in a plane
  • · Replies 9 ·
Replies
9
Views
5K
Graduate What is the purpose of heterodyning in radio astronomy?
  • · Replies 2 ·
Replies
2
Views
4K
Graduate Can Strong Magnetic Fields Push White Dwarfs Beyond the Chandrasekhar Limit?
  • · Replies 3 ·
Replies
3
Views
3K
Undergrad Conjuction of planets to Earth, it affects our weight?
  • · Replies 10 ·
Replies
10
Views
4K
Graduate Estimates of galaxy numbers - re Herschel resuts
  • · Replies 7 ·
Replies
7
Views
3K
Graduate Are Hawking's Equations for Black Hole Energy and Evaporation Time Flawed?
  • · Replies 10 ·
Replies
10
Views
3K
Graduate Hi there. Just looking at an astophysics journal article in which they
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad A rudementary question on dark matter
  • · Replies 3 ·
Replies
3
Views
3K
Graduate Chandrasekhar Limit: Neutron Star vs. Black Hole
  • · Replies 9 ·
Replies
9
Views
4K
High School In essence how does time travel relate to space?
  • · Replies 7 ·
Replies
7
Views
2K
Graduate How do the tidal forces warming moons theories hold when []
  • · Replies 12 ·
Replies
12
Views
3K
Undergrad Light Years: Subjectivity and Distance Measurement
  • · Replies 5 ·
Replies
5
Views
2K
High School Can the Sagittarius and Canis Major Dwarf Galaxies be Seen with the Naked Eye?
  • · Replies 19 ·
Replies
19
Views
5K
Graduate Are Black Holes the Ultimate Cleaners of the Universe?
  • · Replies 3 ·
Replies
3
Views
3K
Undergrad Could an ion engine attached to a satellite be used to stabilize orbit?
  • · Replies 5 ·
Replies
5
Views
2K
High School Realistic space flight simulator iOS
  • · Replies 1 ·
Replies
1
Views
3K
High School Stars Rotation | What is Angular Momentum?
  • · Replies 4 ·
Replies
4
Views
2K
Graduate Would Distant Galaxies Still Exist If Time Were Paused?
  • · Replies 9 ·
Replies
9
Views
4K
Graduate Can dark matter form planets and dark matter life?
  • · Replies 13 ·
Replies
13
Views
13K
Graduate Back and forward orbit [around gravitating objects]
  • · Replies 52 ·
2
Replies
52
Views
9K
Undergrad Space Elevators -> US Transportation Infrastructure
  • · Replies 23 ·
Replies
23
Views
6K
Undergrad What would a toroidal planet be like?
  • · Replies 16 ·
Replies
16
Views
10K
Undergrad Why there is so little carbon in Earth crust?
  • · Replies 2 ·
Replies
2
Views
6K
Undergrad What Causes Elliptical Galaxies to be Elliptical?
  • · Replies 4 ·
Replies
4
Views
2K
Graduate Planetary Formation Based on Matter Condensation and Accretion
  • · Replies 2 ·
Replies
2
Views
6K
Undergrad Gravity & Shapes: Ellipse, Parabola, Hyperbola?
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad Can you reach absolute zero in complete empty space
  • · Replies 14 ·
Replies
14
Views
4K
Undergrad Importance of a standard candle?
  • · Replies 3 ·
Replies
3
Views
3K
Undergrad Measuring the distance to stars using parallax
  • · Replies 3 ·
Replies
3
Views
3K