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.
Threads
Graduate Combining estimated errors (galaxy properties, observational)
- Jean Tate
- · Replies 5 ·
Stargazing Help is needed in understanding my telescope
- grobertsx
- · Replies 5 ·
High School Percentage of stars that become black holes
- revo74
- · Replies 10 ·
Graduate Can matter focus neutrinos in a supernova event?
- Spinnor
- · Replies 4 ·
Undergrad Creating a Equation to Destroy the Sun
- hgivens07
- · Replies 5 ·
Graduate A way to ripple the fabric of space?
- dilsfunspot
- · Replies 1 ·
High School Geminid meteor goes the wrong way.
- Darwin123
- · Replies 12 ·
Graduate Thoughts and questions about the CMBR.
- Endervhar
- · Replies 25 ·
Graduate The farthest matter we will ever hear from
- marcus
- · Replies 3 ·
Undergrad How could the early universe expand faster than light?
- Noaly
- · Replies 3 ·
Undergrad Chelyabinsk Meteor Shockwave 2/15/2013
- TravelinTom
- · Replies 21 ·
Graduate Curious about Black hole information paradox
- Akshay_Anti
- · Replies 8 ·
Undergrad Why did the Chelyabinsk Meteor Explode?
- Zorwell
- · Replies 9 ·
Undergrad Star collapse to form directly a black hole
- shounakbhatta
- · Replies 3 ·
Graduate Do all supernovae produce nebulae and neutron stars?
- shounakbhatta
- · Replies 6 ·
Graduate Solution to the cosmological constant problem
- Chronos
- · Replies 6 ·
Graduate What do we know about Baryogenesis?
- pdyxs
- · Replies 3 ·
Undergrad Does Jupiters moon Io exhibit plate tectonics?
- willstaruss22
- · Replies 1 ·
High School Is Russian meteor related to a asteroid known as 2012 DA14?
- M@2
- · Replies 10 ·
Graduate Expanding Space-time and the active vaccuum.
- geordief
- · Replies 4 ·
Graduate Nodal Precession Rates of Solar System Planets
- Kev2013
- · Replies 1 ·
Graduate Inflation & Quasars energy and 'fast-forward effect' ?
- pibara
- · Replies 4 ·
Graduate What is the difference between coasting and static cosmology?
- Lino
- · Replies 9 ·
Graduate Is the Boltzmann Brain Paradox a valid explanation for our existence?
- Lobar
- · Replies 11 ·
Graduate How Will the Universe End?
- Yosty22
- · Replies 2 ·
Stargazing Eyepiece for refractor telescope
- PhysicoRaj
- · Replies 5 ·
Graduate Questions arisen while reading Weinberg's Cosmology
- kiwakwok
- · Replies 4 ·
Undergrad Drake equation for civilizations communicating with each other
- dkotschessaa
- · Replies 16 ·
Undergrad Pulsars - Rotating neutron star produces EM radiation?
- shounakbhatta
- · Replies 5 ·
Graduate Dark energy and dark matter as curvature effects?
- petergreen
- · Replies 11 ·
High School Astro Physics Project Ideas for my National Science Fair
- emshine
- · Replies 5 ·
Graduate How can we know the universe is accelerating now if we only see the past?
- Photon_2013
- · Replies 22 ·
Undergrad Can a planet in the habitable zone survive without a host star?
- Yosty22
- · Replies 5 ·
High School Earth's orbit shape and what a week signifies
- mycotheology
- · Replies 7 ·
Graduate What will be the change in celestial coordinates in 50 years?
- Eimantas
- · Replies 1 ·
Graduate Positing the Big Bang as a definitive theory .
- me_aguevas
- · Replies 7 ·
Graduate Is Space a Fluidic Medium?
- ideal_fluid
- · Replies 7 ·
Graduate What is the 'fabric of the cosmos' and what drives its cosmic loom?
- HawkLogic
- · Replies 5 ·
Graduate The Ostrogradski instability and f(R) theory
- micomaco86572
- · Replies 1 ·
Undergrad Possibilities of Gravitational Pull in Space Travel
- madawg70
- · Replies 1 ·
Graduate Why spacetime quantization does not prevent blackhole formation?
- Andrea Panza
- · Replies 16 ·
High School How does mercury exist in the Sun's presence.
- motorman
- · Replies 11 ·
High School Is the Earth's Core Solid or Liquid?
- motorman
- · Replies 8 ·
Graduate Why Doppler redshift alone cannot explain distant galaxy redshifts
- Kamil Szot
- · Replies 12 ·
Graduate No big bang, no beginning, and no end?
- petergreen
- · Replies 2 ·
Undergrad Changes to day length at solstices vs. equinoxes
- AstroDoug
- · Replies 12 ·
Graduate What sort of atmosphere could a rogue planet have?
- CCWilson
- · Replies 2 ·
Graduate Is the Big Bang Similar to a Black Hole?
- Naty1
- · Replies 1 ·
Graduate Could the Big Bang Be a Result of Black Hole Cycles?
- sdgmcdon
- · Replies 10 ·
Book recommendations about the Voyager missions
- esmeralda4
- · Replies 17 ·
Graduate The expansion of time, probably ad nauseum
- Clue+less
- · Replies 43 ·
Is Earth the only planet fine-tuned for life?
- Gomar
- · Replies 19 ·
Graduate A possible Coasting Universe model vs ΛCDM
- petergreen
- · Replies 15 ·
Graduate Homogeneous/Inhomogeneous particle production
- Mordred
- · Replies 2 ·
Graduate Ripping apart baryons at the end of the universe creating new particles?
- Wondrous
- · Replies 3 ·
Graduate Significance of the Huge-LQG for homogeneous universe
- VantagePoint72
- · Replies 6 ·
Graduate Quantum gravity in astrophysics?
- romsofia
- · Replies 3 ·
Graduate Three-Body orbital simulation reference plane
- AussieDave
- · Replies 4 ·
Graduate Complete solution of the ΛCDM model problems
- petergreen
- · Replies 12 ·
Graduate Schwarzschild radius if all stars condensed into one black hole
- Astro_Will
- · Replies 9 ·
Graduate Could this solar system have stable orbits.
- willstaruss22
- · Replies 1 ·
What is elegant about the universe?
- bluemoonKY
- · Replies 5 ·
Graduate How Does Hawking Radiation Affect Black Hole Temperature?
- AbsoluteZer0
- · Replies 3 ·
Graduate Virtual particle creation in black holes
- AbsoluteZer0
- · Replies 4 ·
Graduate Questions on Big Bang Singularity
- PhysicsDad
- · Replies 5 ·
Undergrad The Effects of Dumping Nuclear Waste into the Sun
- SHISHKABOB
- · Replies 38 ·
Graduate Radio communication at 200 AU near the heliopause
- StrayCatalyst
- · Replies 6 ·
Graduate Meaning of a Flat, Open, and Closed Universe
- dchartier
- · Replies 21 ·
Graduate The ultimate demise of the universe
- sharik007
- · Replies 5 ·
Graduate Why Was It Significant to Discover Black Hole Entropy and Temperature?
- Islam Hassan
- · Replies 3 ·
Graduate How did the Big Bang happen if expansion started slowly?
- Perchie
- · Replies 5 ·
High School Would a house and food survive being transported to the moon?
- CCWilson
- · Replies 4 ·
High School Is Earth's Gravity Changing Day to Day?
- Gliese123
- · Replies 20 ·
Undergrad Is a Matterless Universe Larger than One Filled with Matter?
- Postzeep
- · Replies 10 ·
High School Question on the history of calculating the orbital of planets
- tinir
- · Replies 2 ·
Graduate How Did Saturn's 2010 Storm Impact Its Atmosphere?
- Astronuc
- · Replies 1 ·
Graduate What Is the Mathematical Form of Type Ia Supernovae Light Curves?
- shinjinibsu
- · Replies 5 ·
Undergrad Old space information, relevant conclusions?
- Xeeg
- · Replies 2 ·
Graduate What is the latest research on the Cosmic Neutrino Background?
- Mordred
- · Replies 6 ·
High School Is it possible to be completely still in space?
- jaydnul
- · Replies 5 ·
Graduate New blackhole mass measuring method
- Mordred
- · Replies 3 ·
Graduate What is the calculational definition of the 'big bang'?
- pellman
- · Replies 12 ·
Graduate How can the Universe be infinite and there be an infinite number of Universes?
- benji28
- · Replies 10 ·
Graduate How is energy density calculated
- jimjohnson
- · Replies 2 ·
Graduate Rise of the Phoenix: DAMA/LIBRA Claims Detection of Dark Matter
- Chronos
- · Replies 3 ·
Graduate How big bodies can exist in outer Solar System?
- snorkack
- · Replies 11 ·
Graduate GRB Hypothesis for Terrestrial C14 and Be10 Spike
- GerdankenDonuts
- · Replies 6 ·
Undergrad What advancements are expected in radio astronomy?
- NGC
- · Replies 3 ·
Graduate How to prove the stretching of space
- timmdeeg
- · Replies 89 ·
High School Why planets in the solar system lie almost in a plane
- jk22
- · Replies 9 ·
Graduate What is the purpose of heterodyning in radio astronomy?
- NGC
- · Replies 2 ·
Graduate Can Strong Magnetic Fields Push White Dwarfs Beyond the Chandrasekhar Limit?
- Chronos
- · Replies 3 ·
Undergrad Estimating the number of galaxies
- jimjohnson
- · Replies 13 ·
Undergrad Theories of the origins of the universe
- Simplexus1
- · Replies 7 ·
Graduate Christoffel symbols for the Friedmann metric
- pleasehelpmeno
- · Replies 7 ·
Graduate What is wrong with my theory about universe expanding.
- bydie
- · Replies 3 ·
Graduate What was the distance to the CMB when the radiation was created?
- jety89
- · Replies 21 ·
Undergrad No moon=no tides no tides=no life Is that entirely correct?
- Cyghost
- · Replies 5 ·
Graduate What is the value of the cosmic gravitational potential?
- Vincentius
- · Replies 8 ·
Undergrad How do inflation, zero energy, and flat geometry connect?
- neugie92
- · Replies 2 ·