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 Will it be hard to find planets with live plate tectonics?
  • · Replies 2 ·
Replies
2
Views
3K
High School Mystery of Jupiter's Red Dot: Uncovering the Cause
  • · Replies 2 ·
Replies
2
Views
8K
Graduate Unifying the Robertson-Walker metric
  • · Replies 2 ·
Replies
2
Views
3K
High School The Big Bang: Matter Creation & Photons
  • · Replies 5 ·
Replies
5
Views
2K
Stargazing (Telescopes) Certifiably confused.
  • · Replies 7 ·
Replies
7
Views
2K
Graduate Gas Giants & Venus: Could They Be One & The Same?
  • · Replies 1 ·
Replies
1
Views
4K
Undergrad Life Against All Odds: Are We Alone in the Galaxy?
  • · Replies 22 ·
Replies
22
Views
4K
Graduate Searching for a Physics Book - Astronaut Dragging Personal Black Hole
  • · Replies 1 ·
Replies
1
Views
2K
High School Infinite Galaxy: Can Our Universe Really End?
  • · Replies 4 ·
Replies
4
Views
4K
Graduate Restricted circular 3 body problem RC3BP
  • · Replies 1 ·
Replies
1
Views
5K
Graduate Exploding and Collapsing Stars: The Mystery of Dark Quark Bodies
  • · Replies 1 ·
Replies
1
Views
3K
Graduate The Dark Age of the Early Universe: How Did the CMBR Reach Us?
  • · Replies 13 ·
Replies
13
Views
3K
High School Sirius - habitable orbit? (link)
  • · Replies 6 ·
Replies
6
Views
5K
Graduate A star located 135 degrees from the solar apex on the celestial sphere
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad How can empty space give off radiation from the Big Bang?
  • · Replies 11 ·
Replies
11
Views
4K
Reminder about Deep Impact on night of July 3
  • · Replies 8 ·
Replies
8
Views
3K
Graduate Cosmological Expansion & Uniqueness of Gravity: Multamaki and Vilja
  • · Replies 6 ·
Replies
6
Views
3K
Graduate Can Space-Time Be Quantized and What Could That Mean for Physics?
  • · Replies 3 ·
Replies
3
Views
7K
Undergrad Life evolving on a planet revolving a red dwarf?
  • · Replies 7 ·
Replies
7
Views
3K
Undergrad Exoplanets in Habitable Zones: HD28185, HD108874, Gliese 876
  • · Replies 5 ·
Replies
5
Views
4K
Graduate Current galaxy formation in the CDM model
  • · Replies 10 ·
Replies
10
Views
3K
Graduate Fluctuation Theorem, Big Bang Question
  • · Replies 1 ·
Replies
1
Views
2K
Graduate What Are the Best Current Physics and Astrophysics Books for Graduate Students?
  • · Replies 4 ·
Replies
4
Views
7K
Graduate Origin of cosmic gamma ray background
  • · Replies 6 ·
Replies
6
Views
3K
High School Balck hole within 20 light years?
  • · Replies 9 ·
Replies
9
Views
3K
Graduate Acceleration At The Event Horizon
  • · Replies 29 ·
Replies
29
Views
14K
High School Earth's 'bigger cousin' detected
  • · Replies 16 ·
Replies
16
Views
5K
Undergrad Drake Equation: Estimating Life Supporting Planets & Detecting Life
  • · Replies 25 ·
Replies
25
Views
5K
Graduate What Makes Quantum Cosmology Different from Traditional Models?
  • · Replies 17 ·
Replies
17
Views
4K
Graduate A little direction regarding dark energy.
  • · Replies 4 ·
Replies
4
Views
2K
High School How does other galaxies differ from out own?
  • · Replies 5 ·
Replies
5
Views
3K
High School What Can You Expect to See from Earth During the Comet Buster Impact?
  • · Replies 5 ·
Replies
5
Views
4K
Undergrad Is DST Causing Confusion in Determining UTC for Historical Events?
  • · Replies 8 ·
Replies
8
Views
2K
High School What is the distance to the nearest star?
  • · Replies 7 ·
Replies
7
Views
4K
High School Texts on Introduction to Astronomy/Cosmology
  • · Replies 3 ·
Replies
3
Views
3K
Graduate Moon-Earth Slingshot: Launching Craft to Other Solar Objects
  • · Replies 10 ·
Replies
10
Views
5K
Network to connect television satallite dishes
  • · Replies 4 ·
Replies
4
Views
3K
High School What Can You Actually See in the Asteroid Belt with the Naked Eye?
  • · Replies 4 ·
Replies
4
Views
5K
Stargazing How do I properly set up a telescope mount for accurate tracking and viewing?
  • · Replies 2 ·
Replies
2
Views
4K
High School Why Variable Stars Change Magnitudes Periodically
  • · Replies 2 ·
Replies
2
Views
2K
Stargazing What am I doing wrong? - Telescope Trouble
  • · Replies 7 ·
Replies
7
Views
3K
Graduate Cosmology: the scinece on the universe.
  • · Replies 4 ·
Replies
4
Views
2K
Graduate Black hole confusion Not uncommon, is it?
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Is There Really an Ocean Beneath Europa's Ice?
  • · Replies 4 ·
Replies
4
Views
4K
Undergrad Wien's law and black body emition
  • · Replies 5 ·
Replies
5
Views
6K
Is Our Galaxy One of the Oldest?
  • · Replies 6 ·
Replies
6
Views
3K
Graduate Can Dark Matter and Dark Energy Unify the Expansion of the Universe?
  • · Replies 2 ·
Replies
2
Views
3K
Graduate New one by Moffat (comparing fit to rotation curves)
  • · Replies 11 ·
Replies
11
Views
3K
High School Explosions in Space: No Use in Space?
  • · Replies 4 ·
Replies
4
Views
4K
Graduate Vilenkin's Proposal: Can Absolute Nothingness Exist?
  • · Replies 2 ·
Replies
2
Views
3K
Graduate Revisiting the Controversial Cosmic Censorship Hypothesis
  • · Replies 2 ·
Replies
2
Views
3K
High School Does nightime sky face outer or inner galaxy?
  • · Replies 7 ·
Replies
7
Views
3K
Graduate What is the Meaning of Scale Radius in Spiral Galaxies?
  • · Replies 3 ·
Replies
3
Views
15K
Virtual Observatory: Cruise the Heavens from Your Recliner
  • · Replies 4 ·
Replies
4
Views
3K
Graduate What would cause a black hole to explode?
  • · Replies 5 ·
Replies
5
Views
4K
Stargazing Is There a Way to View the Night Sky Without Leaving Your Computer?
  • · Replies 1 ·
Replies
1
Views
3K
Graduate Reduced Circumference: Schwarzschild vs Kerr Metric
  • · Replies 1 ·
Replies
1
Views
4K
Graduate Did the Big Bang Theory Withstand Challenges from Eric Lerner and Metaresearch?
  • · Replies 14 ·
Replies
14
Views
4K
Testability thread is great (keeping comment/discussion out works, too)
  • · Replies 13 ·
Replies
13
Views
5K
Graduate What Happens If You Stick Your Hand Inside a Black Hole's Event Horizon?
  • · Replies 13 ·
Replies
13
Views
4K
Undergrad Quasars,white dwarf and neutron stars
  • · Replies 8 ·
Replies
8
Views
5K
Graduate How Would the Universe Appear if Light and Gravity Were Instantaneous?
  • · Replies 4 ·
Replies
4
Views
3K
Graduate My thoughts on Space-Time and Matter-Gravity
  • · Replies 4 ·
Replies
4
Views
6K
Graduate Do Black Holes Violate the Laws of Thermodynamics?
  • · Replies 7 ·
Replies
7
Views
3K
Graduate Neutron diffusion and nucleosynthesis
  • · Replies 2 ·
Replies
2
Views
3K
Graduate Total Eclipse of the Sun: 40s Before Alignment
  • · Replies 2 ·
Replies
2
Views
4K
Graduate Artificial Blackbody & Artificial Black Hole: Reality or Theory?
  • · Replies 1 ·
Replies
1
Views
3K
Graduate A solid surface model of the sun.
  • · Replies 1 ·
Replies
1
Views
5K
How many alien civilizations are existing in the Milky Way
  • · Replies 22 ·
Replies
22
Views
4K
Graduate Is the Sun's Surface Actually Solid and Electrically Conductive?
  • · Replies 3 ·
Replies
3
Views
5K
Undergrad Calculating the age of the universe
  • · Replies 2 ·
Replies
2
Views
12K
Graduate Null Energy Condition: What Is It?
  • · Replies 1 ·
Replies
1
Views
6K
Graduate Could Light from Distant Stars Be Doppelgangers Due to Gravitational Lensing?
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Random walk and universal expansion
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Is the Big Bang Theory Really Wrong?
  • · Replies 11 ·
Replies
11
Views
3K
Graduate Time to reach thermal equilibrium with radiation
  • · Replies 2 ·
Replies
2
Views
6K
Graduate Question about exploding neutron stars
  • · Replies 3 ·
Replies
3
Views
3K
Stargazing Cost-effective digital camera and telescope
  • · Replies 3 ·
Replies
3
Views
1K
Graduate BAre Galaxy Clusters Altering the Primordial Echoes from the Big Bang?
  • · Replies 6 ·
Replies
6
Views
2K
Graduate Space Finite: Flat/Open Universe Possibilities
  • · Replies 30 ·
2
Replies
30
Views
4K
Who Here Is In The Rare Earth Camp?
  • · Replies 7 ·
Replies
7
Views
3K
Graduate Maximum count for mutually bound stars
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad NBody evaluation, is my model correct?
  • · Replies 12 ·
Replies
12
Views
3K
Undergrad Blackhole at the center of each galaxy, think again
  • · Replies 34 ·
2
Replies
34
Views
8K
Graduate What happens when two black holes meet?
  • · Replies 4 ·
Replies
4
Views
4K
Graduate Explaining Curved Space-Time to a Friend
  • · Replies 39 ·
2
Replies
39
Views
7K
Graduate Are Gravitational Waves Really Non-Existent? Examining the Evidence
  • · Replies 12 ·
Replies
12
Views
3K
Stargazing What Are the Theoretical Limits on Radio Telescope Size and Resolution?
  • · Replies 2 ·
Replies
2
Views
4K
Graduate What does a neutron star look like
  • · Replies 1 ·
Replies
1
Views
22K
Graduate Neutron Star Evolution and Possible Blackhole Formation in Proton Star Collapse
  • · Replies 5 ·
Replies
5
Views
4K
Graduate How Does Quantum Chaos Theory Explain the Big Bang?
  • · Replies 3 ·
Replies
3
Views
13K
Graduate Detect planets through mag field?
  • · Replies 2 ·
Replies
2
Views
3K
Undergrad Could Cosmic Background Radiation Hold Clues About the Big Bang?
  • · Replies 3 ·
Replies
3
Views
4K
Graduate How Do Masers Explain the Process of Massive Star Formation?
  • · Replies 3 ·
Replies
3
Views
3K
Where have you travelled virtually in spacetime?
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Vela-X supernova and carbon dating?
  • · Replies 6 ·
Replies
6
Views
5K
Graduate Please give me some advise about DEC (dominant energy conditions)
  • · Replies 1 ·
Replies
1
Views
4K
Graduate Does BH Mass Boundary Vary with Matter Type?
  • · Replies 5 ·
Replies
5
Views
2K
Graduate Quasars non cosmological red shift.
  • · Replies 1 ·
Replies
1
Views
3K
Graduate Eot-Wash sub-mm test inverse square law
  • · Replies 1 ·
Replies
1
Views
4K