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
High School Dark Matter Stars: Burning Hot and Invisible
- presto129
- · Replies 10 ·
High School Space Camera Project: Ideas for STEM & Space Exploration
- Angela Ituriaga
- · Replies 5 ·
Undergrad What would happen if you moved a black hole?
- GA470
- · Replies 11 ·
High School What Happens When a Black Hole Interacts with Antimatter?
- Daniel Petka
- · Replies 10 ·
Undergrad Effect of rotational inertia on gravity or visa versa
- Scott444
- · Replies 5 ·
High School Is Time's Flow Affected by Cosmic and Quantum Scales?
- fwc
- · Replies 6 ·
High School Cepheid variable stars cause of light variance
- Glenn G
- · Replies 5 ·
Undergrad Do we need Dark Matter or are we just time blind
- Bruce Wilson
- · Replies 30 ·
High School If something stands absolutely still in the space can it time travel?
- julia orbey
- · Replies 24 ·
Undergrad Understanding Hubble's Graph: Velocity and Time Relationship Explained
- fencewalker
- · Replies 28 ·
High School Why Do Hot Stars Like Zeta Puppis Appear Blue Despite Low Wavelengths?
- PhysKid45
- · Replies 8 ·
Undergrad Interstellar travel/centrifugal couching
- Jigsaw674
- · Replies 5 ·
High School Why is vacuum energy assumed to be uniform?
- newjerseyrunner
- · Replies 5 ·
Undergrad Object moving out of the Observable Universe due to Expansion
- MLaw
- · Replies 12 ·
High School What is seen from the farthest star?
- bubal
- · Replies 55 ·
High School How can the Universe grow if it is infinite?
- Sen Turner
- · Replies 114 ·
Undergrad Find the Age of the Universe when Matter and Radiation densities were equal
- FallenGod
- · Replies 24 ·
Undergrad Exact expression for the tensor-to-scalar ratio
- Whitehole
- · Replies 3 ·
High School What can we see from the farthest reaches of the universe?
- Lewis123
- · Replies 5 ·
High School Generating Plausible Star Systems
- Dyrakean
- · Replies 2 ·
Graduate Does the Hadronic Era Alter the Equation of State?
- fhenryco
- · Replies 12 ·
High School Black holes are creating galaxies with their gravitational force
- acidmatic
- · Replies 11 ·
High School What would a timeline for the Big Rip look like?
- FelixH
- · Replies 2 ·
High School What is the appropriate time/matter model for the universe?
- BernieM
- · Replies 18 ·
Undergrad Can a finite universe end in heat death?
- durant35
- · Replies 32 ·
High School How can I conceptualise light and the known universe
- Lewis123
- · Replies 3 ·
Undergrad Problems with the theory of inflation
- kodama
- · Replies 13 ·
Stargazing Trig Parallax: Measurement & Apparent Shift of Nearby Stars
- Glenn G
- · Replies 4 ·
Undergrad How Does Gravity and Density Influence the Flow of Time?
- Jens K Munk
- · Replies 12 ·
High School Infinite vs Expanding Universe: A Physics Conundrum Explained
- Physics_Kid
- · Replies 74 ·
High School The known universe is expanding?
- Lewis123
- · Replies 6 ·
Undergrad Are Galaxies Moving or is Space-Time Expanding?
- Arman777
- · Replies 5 ·
Undergrad Is there any international astronomy competitions for adults
- ahmadreza
- · Replies 5 ·
High School E=0. What Does That Mean for the Seasons?
- JohnWDailey
- · Replies 2 ·
Stargazing Are there astronomy competitions?
- GiantSheeps
- · Replies 11 ·
Undergrad Big Bang nucleosynthesis Wiki Equation for t x T^2
- Buzz Bloom
- · Replies 20 ·
Undergrad Question about expansion and photon fatigue
- Grinkle
- · Replies 12 ·
Stargazing Is it a true explanation of an aberration of starlight?
- daggab
- · Replies 3 ·
High School Is Time Expanding Along with Space in the Expanding Universe?
- lomidrevo
- · Replies 6 ·
High School Can a solar sail be accelerated 20% speed of light
- wolram
- · Replies 16 ·
High School Why does expansion redshift light if....
- unwillingly ignorant
- · Replies 16 ·
High School What fueled the Big Bang explosion?
- Brunolem33
- · Replies 20 ·
High School Is the center of the universe empty?
- Ed Lenarduzzi
- · Replies 39 ·
Stargazing [just for fun] Planet Definition
- WaxyChicken
- · Replies 2 ·
Undergrad How Would Future Species Understand a Dynamic Universe?
- maroubrabeach
- · Replies 34 ·
High School Would a manned flyby of Ceres be easier than a mars landing?
- donglepuss
- · Replies 8 ·
High School Could Current Technology Enable a Manned Mission to Europa?
- lifeonmercury
- · Replies 18 ·
High School Surface Temperatures - White Dwarf vs Neutron Star
- Jimmy87
- · Replies 7 ·
Stargazing А neutron star and a photon sphere
- daggab
- · Replies 2 ·
High School How long would remains be detectable?
- newjerseyrunner
- · Replies 4 ·
Undergrad Could ice exist in Lunar lava tubes?
- Al_
- · Replies 2 ·
High School Our atmosphere and the rotating Earth
- pkt
- · Replies 31 ·
Undergrad Why do quantum physicists claim that particles can tunnel out of a quantum well?
- shaiyefet
- · Replies 6 ·
Graduate Question about the age of the universe
- Prophet
- · Replies 10 ·
High School Space news and events aggregator app
- orb_yt
- · Replies 2 ·
Undergrad Dark Matter Particles: College Student Seeking Theorem Evidence
- murenzi
- · Replies 3 ·
High School The distribution of normal matter precisely determines gravity
- wolram
- · Replies 4 ·
High School Does the Frequency of Gravitational Radiation Alter the Cosmological Constant?
- wolram
- · Replies 11 ·
High School Book recommendations for Big Bang Model?
- Bran
- · Replies 10 ·
High School Seeing Venus with the Naked Eye - Light Pollution
- Hawksteinman
- · Replies 4 ·
Graduate How Does Dark Matter Affect Galaxy Motion and Formation?
- PhotonSSBM
- · Replies 8 ·
High School Why do we assume the existence of time (flow)?
- Greeneyes
- · Replies 2 ·
Stargazing What is the best way to reduce overexposure in DSLR astrophotos?
- QuantumPion
- · Replies 8 ·
Undergrad What Is the Cosmic Horizon and Its Relation to Black Holes?
- Arman777
- · Replies 11 ·
Undergrad Are we living in a Boltzmann box ?
- Arman777
- · Replies 2 ·
Undergrad A possible solution to the cosmic lithium problem
- Chronos
- · Replies 15 ·
High School Top 3 brighest planets as seen from other planets
- lifeonmercury
- · Replies 10 ·
High School Is Everything outside the local group moving away from us?
- unwillingly ignorant
- · Replies 2 ·
High School Arecibo Message: Will It Be Received 25,000 Years Later?
- lifeonmercury
- · Replies 4 ·
Graduate Detection of 6th Force of Nature: Zhang & Feng Claims
- Chronos
- · Replies 6 ·
Undergrad Variations in the local value of Hubble constant
- resurgance2001
- · Replies 9 ·
Undergrad How is the value of tT^2 calculated for neucleosynthesis
- Buzz Bloom
- · Replies 1 ·
Stargazing Understanding Star Formation: Triggering and Transformation Explained
- helioscenturion
- · Replies 10 ·
Undergrad Quasars & Redshifts: Measuring Redshifts & Jet Formation
- Mike Holland
- · Replies 2 ·
Undergrad What is the link between dark matter and antimatter in the universe?
- rootone
- · Replies 11 ·
High School Geology of Ceres illuminates origin of organics
- wolram
- · Replies 1 ·
Stargazing Can Venus be seen during the day from sea level right now?
- BenAS
- · Replies 1 ·
Undergrad Does Star's Mass Loss Challenge the Concept of Dark Energy?
- kurt binderberger
- · Replies 9 ·
High School Finding the distance of two points from observer
- Tahmeed
- · Replies 13 ·
High School Challenging the Existence of Black Holes: A Critical Analysis of Recent Research
- Mohd Abdullah
- · Replies 3 ·
High School Animation to explain the balance of celestial bodies of the universe
- mktsgm
- · Replies 22 ·
High School How can we find the curvature of a star or planet?
- Tahmeed
- · Replies 4 ·
High School What part of the Moon am I looking at?
- lifeonmercury
- · Replies 11 ·
Stargazing Expanding Universe: A New Theory on Dark Energy, Black Holes & More
- mickael alain
- · Replies 1 ·
High School Perhaps a silly analogy - hologram light source retreating?
- SteveSA
- · Replies 1 ·
High School Could neutrinos be the key to successful SETI communication?
- Chronos
- · Replies 2 ·
Undergrad At which time did the CMB become dark?
- Gerinski
- · Replies 6 ·
Undergrad What's the Latest on Fast Radio Bursts?
- Chronos
- · Replies 4 ·
Undergrad Calculating planet's radius using a star's luminosity
- JohnnyGui
- · Replies 32 ·
High School In how many years will the surface of the Sun be 75 degrees Fahrenheit?
- lifeonmercury
- · Replies 4 ·
High School How can we see 45B ly away if the universe is only 13B years
- unwillingly ignorant
- · Replies 6 ·
Undergrad Does the Debye Length Change with Applied Potential Strength in a Plasma?
- Sharkey4123
- · Replies 2 ·
High School Comets, Water & the Sun: Investigating Earth's Origins
- Vrbic
- · Replies 2 ·
High School White Hole as an explanation for the big bang and inflation
- Tanelorn
- · Replies 14 ·
Undergrad Requirements for a breathable atmosphere
- Physics quest
- · Replies 17 ·
Undergrad Is there a drag on Earth caused by its motion relative to the CMB rest frame?
- substitute materials
- · Replies 5 ·
High School Can a photon be made energetic enough to escape a black hole
- Leyzorek
- · Replies 9 ·
Undergrad Great attractor and the CMB dipole
- Chronos
- · Replies 6 ·
Undergrad Matter term in Friedmann’s equation
- Buzz Bloom
- · Replies 12 ·
Undergrad Is the Universe's Contraction Model Too Fine-Tuned to Be Plausible?
- palmer eldtrich
- · Replies 5 ·