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 The Flyby Anomaly: Ranging Data, Transverse Doppler Effect
- ideasrule
- · Replies 7 ·
Graduate Least massive earth like planet possible in the habitable zone?
- Researcher X
- · Replies 12 ·
High School About how far are we now from where we were one year ago?
- justwondering
- · Replies 8 ·
Graduate What Are the Inclinations of Planetary Orbits Relative to the Sun's Equator?
- Leo Klem
- · Replies 5 ·
Graduate Absolute velocity, CMB, and doppler shift
- Starwatcher16
- · Replies 15 ·
Graduate Life, the universe and everything
- wittgenstein
- · Replies 43 ·
Graduate Capturing an asteroid in Earth orbit
- bhn1700
- · Replies 1 ·
High School Are All the Stars We See Actually Dead?
- Maroc
- · Replies 3 ·
High School View 65 Million Years of Time - Time-Travel Viewer
- jackchen
- · Replies 1 ·
Undergrad The Mystery of WASP-18b: Uncovering the Mass and Rotation of Its Mother Star
- Bjarne
- · Replies 4 ·
Graduate Another expanding universe question
- Sumo
- · Replies 3 ·
High School The Reality of Majoring in Astrophysics: Is it Worth It?
- Ironside
- · Replies 2 ·
Graduate Speed of light effected by expansion of space?
- rasp
- · Replies 43 ·
Undergrad Doppler effect and expanding universe
- elitenoobboy
- · Replies 9 ·
Graduate What is a cosmic red-out and how does it relate to the collision of galaxies?
- TheAlkemist
- · Replies 20 ·
Undergrad What Holds People on Earth if Gravity is the Spacetime Fabric?
- Nickriener
- · Replies 4 ·
Undergrad Moon-Earth distances and interactions
- moon_sphinx
- · Replies 2 ·
Graduate Dark Energy, Expansion, and Acceleration.
- andreasj
- · Replies 15 ·
Graduate Accelerated expansion without Dark Energy?
- phsopher
- · Replies 12 ·
High School Is the 2006 edition of The Elegant Universe DVD worth the extra features?
- liamgibbs
- · Replies 5 ·
Graduate Black Holes: Viable Scientific Theory? Or Voo-Doo Science?
- John MacNeil
- · Replies 39 ·
If there is topic Is Our Universe Flat poin me.
- Mihael@@/&
- · Replies 1 ·
High School Would We Feel Heat Loss If All Stars Except the Sun Went Out?
- BSMo
- · Replies 4 ·
Cosmic Darwinism - Definition & Overview
- Nickriener
- · Replies 8 ·
Graduate Hawking Radiation: Theory & Evidence Behind Black Hole Emission
- astro2cosmos
- · Replies 11 ·
Graduate The Production and Behavior of Dark Matter Neutrinos
- friend
- · Replies 5 ·
Graduate Could Parallel Universes Really Collide?
- MathematicalPhysicist
- · Replies 4 ·
Graduate Is there good evidence we live in Block Universe?
- Wangf
- · Replies 1 ·
Undergrad Why Are Orbits Elliptical? Rules of Circular Motion
- Red_CCF
- · Replies 15 ·
Graduate Is Dark Energy Really Constant? New Evidence from Multiple Surveys
- wolram
- · Replies 4 ·
Graduate Calculating Moon Coordinates During Solar Eclipse of August 11, 1999
- Andru10
- · Replies 4 ·
Graduate Warping Space in a Craft: Gravity or Conventional Energy?
- Bunting
- · Replies 7 ·
Undergrad Can a Telescope See Itself from 100km Above Earth?
- Yoav
- · Replies 2 ·
High School What is the Case History of Discovering the Speed of Light?
- Nickriener
- · Replies 3 ·
High School Why Do Jupiter's Moons Orbit in a Plane?
- Pupil
- · Replies 8 ·
Graduate How fast do I have to go to get away from an explosion in space
- rben13
- · Replies 3 ·
Graduate What Lies Beyond the Edge of the Universe?
- latentcorpse
- · Replies 15 ·
Graduate How do you create the big bang inside metamaterials?
- changeseeker
- · Replies 2 ·
Graduate Orbital Effects of a Significant Mass Increase
- Johmpa
- · Replies 2 ·
Graduate [Advice Needed:] Research in Astronomy/Astrophysics/Cosomology
- C|S
- · Replies 1 ·
Undergrad Solving Brightness Equation with Procyon: 7L☉ and 11.41 light years
- vbillej
- · Replies 5 ·
Graduate How do you define at rest in the Universe?
- Xtyn
- · Replies 9 ·
Graduate What Happens to Accreting Brown Dwarfs in the Galaxy?
- qraal
- · Replies 2 ·
Undergrad Galaxy Recession: Explaining Hubble's Law
- astro2cosmos
- · Replies 2 ·
Undergrad Choices in Multiverse: Do People Differ?
- Otherkin
- · Replies 1 ·
Graduate Does the conservation law prove that energy is eternal?
- 8LAK
- · Replies 25 ·
High School What does Newton's universal constant mean and how is it used?
- brandonhamdy7
- · Replies 2 ·
Graduate Before the Big Bang now a topic for wider audience
- marcus
- · Replies 0 ·
Graduate Escape Velocity and Earth's Gravity
- RocketInquiry
- · Replies 2 ·
Graduate Understand Bubble Nucleation in Phase Transition - Analogy/Figuration
- xiaomaclever
- · Replies 1 ·
Graduate Is the Cyclic Model of the Universe a Viable Alternative to the Big Bang Theory?
- Naty1
- · Replies 18 ·
Graduate How Can a Single Radio Telescope Distinguish Between Point and Extended Sources?
- mordeth
- · Replies 1 ·
High School Does Space Move? Answers to Your Questions
- Komaraseru
- · Replies 6 ·
Graduate Is there something strange with the gravity during total solar eclipses?
- Tilemachos
- · Replies 1 ·
Undergrad Light Speed in Vacuum: What's the Significance?
- Nickriener
- · Replies 4 ·
Graduate How Do You Calculate the Weight of a Black Hole?
- sleventh
- · Replies 4 ·
Graduate The Curvature of Space: Understanding the Flatness of the Universe
- flatcp
- · Replies 10 ·
High School Green lasers: how much power is too much?
- dotancohen
- · Replies 36 ·
Autostar Systems: Efficiency of Current Auto-Star Systems
- Gear300
- · Replies 6 ·
Undergrad Why Isn't a Collapsed Star a Black Ball?
- menniandscience
- · Replies 6 ·
Undergrad What are the types of waves that can travel through space?
- Modman
- · Replies 1 ·
Graduate Calculating Black Hole Matter Absorption and Its Impact on the Universe
- AaronD
- · Replies 3 ·
Stargazing Is the Giant Magellan Telescope set to revolutionize ground-based astronomy?
- jim mcnamara
- · Replies 3 ·
Graduate Accelerating expansion of the universe.
- dmeagor
- · Replies 5 ·
Graduate Amplitude of velocity perturbations at last scattering
- smallphi
- · Replies 1 ·
Undergrad Why can't light escape a black hole?
- Joe436
- · Replies 18 ·
What Triggered the Big Bang According to 'The Universe' on History Channel?
- Nickriener
- · Replies 2 ·
High School I can't understand why the sun moves across the ecliptic
- Wattever
- · Replies 15 ·
High School New Telescope Buyer Seeking Expert Advice
- Stratosphere
- · Replies 7 ·
Question about Expansion and the Center of the Universe
- Salbris
- · Replies 11 ·
Graduate Cosmic Darwinism featured in new view of the universe
- marcus
- · Replies 37 ·
Graduate The Relationship Between Distance and Brightness in Cosmology
- rasp
- · Replies 26 ·
Graduate The singularity moment at the beginning of the universe
- sokrates
- · Replies 36 ·
Graduate Are There Alternative Theories to Explain Redshift and Universal Expansion?
- msumm
- · Replies 5 ·
Graduate Time technically stops after the event horizon correct?
- Oh the irony
- · Replies 1 ·
Graduate Model Universe: Calculating Gravitational Info Rate
- Hippasos
- · Replies 10 ·
Graduate What Life would see around other Stars
- Widdekind
- · Replies 41 ·
Undergrad Black holes and conversation of energy
- Oh the irony
- · Replies 4 ·
Graduate CMB Flux Density: Deriving For Present Cosmology
- Nabeshin
- · Replies 5 ·
Undergrad Can Solar Storms Render All Electronics Useless?
- stupified
- · Replies 4 ·
Graduate Red Shift - From Dark Material Or Recession?
- Seraph316
- · Replies 5 ·
Graduate Cooling of Neutron Stars and Urca-process
- Orbb
- · Replies 5 ·
High School Why are the distant stars so far apart?
- beeresearch
- · Replies 9 ·
Undergrad Why is the moon drifting into space
- oldunion
- · Replies 42 ·
Undergrad Joining two orbiting space vehicles
- danielandpenn
- · Replies 10 ·
Undergrad Spectra Classification: Finding Sources for Stellar Objects
- Cygni
- · Replies 1 ·
Graduate How does the expansion of the universe affect redshift?
- edoarad
- · Replies 1 ·
Graduate What Could Cause a Big Crunch in the Expansion of the Universe?
- TheIsland24
- · Replies 141 ·
Graduate Are galaxies of antimatter identifiable?
- Leo Klem
- · Replies 2 ·
Graduate Black Holes vs. Dark Energy: Who Holds More Power?
- pegasus980
- · Replies 1 ·
Graduate Black holes, white holes, and time
- ocman
- · Replies 13 ·
Undergrad Is There a Center of Mass to the Universe?
- mg0stisha
- · Replies 8 ·
Graduate What is the significance of the Cauchy horizon?
- yanniru
- · Replies 9 ·
High School Anchor a tube on earth and slope it all the way into space
- fileerror404
- · Replies 3 ·
Graduate Could Black Holes Be Portals to Other Universes?
- bondinthesand
- · Replies 6 ·
Graduate Could Minor Density Variations in the Universe Solve the Flatness Problem?
- keepitmoving
- · Replies 2 ·
Graduate Expected sound of colliding black holes
- varsha
- · Replies 9 ·
Undergrad Redshift of Far Galaxies: What Causes It?
- JD88
- · Replies 4 ·
Undergrad Difference between a red/blue shifted object and one in rest.
- Cipz
- · Replies 7 ·
High School What is the composition of a gas giant's atmosphere?
- vanesch
- · Replies 2 ·