Astronomy, Astrophysics, Cosmology Forum

Undergrad Orbit to the Moon: nodes position

Graduate How Do the Schechter Function and Maximum Likelihood Method Differ?

Graduate Evidence that black holes gain in mass?

Undergrad How Long Do Red Giant Stars Last?

Graduate Regarding Higgs boson and ether model

Graduate How well has the force of Dark Energy been calculated?

Graduate Distance expansion and escape velocity ( thought experiment )

Undergrad What Is Galaxy 'Completeness'?

Undergrad L-LOG-SUN - value on stellar data

Graduate Where Did the Original Matter Come From?

Undergrad Why are the colours of nebulae different?

Graduate 3D cloaking changing gravitational lensing ?

Undergrad Valles Marineras Origin and Origin of Asteroid Belt Linked?

Graduate Could Mars's collision with orbiting asteroid reactivate atmosphere?

Undergrad Dark Energy: Big Bang, Big Crunch & Expansion

Graduate Can quasars reactivate within an established galaxy?

Graduate What is the physical limit of compression of matter?

Undergrad The Cyclic Universe: A Theory of Formation and Evolution

Undergrad Are singularities shaped as a sphere.

High School How do you write equations in LaTeX for both Windows and Mac?

Graduate Is There Infinite Matter in an Infinite Universe?

High School Inserting proper symbols/letters for equations

Graduate Mass, Velocity and Special Relativity

Graduate Is the Universe's Expansion Controlled by Gravity from a Black Hole?

Graduate Universe of indistinguishable quanta?

High School Do eyepiece lengths affect telescope magnification?

Undergrad What elements make up the core of a dying star?

Graduate Is the Universe's Energy Increasing Due to Dark Energy?

Undergrad Grail Mission to the Moon: Does Light Exert Pressure?

Graduate Why can Hawking Radiation not work in reverse?

Graduate Motion of celestial objects in Spacetime looks circular in 3D how?

Undergrad When Will the Andromeda and Milky Way Galaxies Merge and Could it Support Life?

Graduate Special thread for answers to Mathbrain's questions

Undergrad Neutron Star or a Pulsar - what decides

High School Modular Physics: Largest Number in the Universe

Graduate Why no attribution to Bohm regarding holographic principles

Graduate Topic: Neutrinos and Gravity: Can They Travel Faster in Contracted Space?

Graduate Why do black holes appear to be eternal red instead of black?

Graduate Why is it considered the 'end of the universe' when the stars go dark?

Graduate Questions on diatomic spectroscopy

Undergrad Where can I find a comprehensive online database for stellar data analysis?

High School Universe age?, I never really understood that

Graduate Are Infinite Universes Compatible with M-Theory and Chaotic Inflation?

Undergrad Type IV Civilizations - Info & References

Graduate Is time measured at receding objects dilated?

Undergrad Position of a Body on a Hyperbolic/Parabolic Orbit with Respect to Time

High School Nonexistence outside the universe

Graduate Matter less Neutrons behave the same Less Inertia?

Stargazing Coronal mass ejection arriving during a solar eclipse

Graduate What Are Entropy Perturbations in Cosmology?

Undergrad Please explain Dopler effect of light

High School How to become an astrophysicist or an astronomer ?

Graduate Can We Aim Our Telescopes Towards the Edge of the Universe?

Undergrad Angle of crab pulsar to the ecliptic

Graduate Time can't exist without matter (mass) and motion

Graduate Does the Universe Ever Reach Maximum Entropy?

Graduate Sitting on a (very) extended object in space

Graduate The speed of light, the term light year , and reference frames.

Graduate Two-Bodies Problem REAL SOLUTION

Graduate Could a Supermassive Black Hole be the Center of our Finite Universe?

• Poll

Undergrad Do we want to sent probe to Newly discovered planet 'Kepler-22b' now?

Undergrad What is the efficiency of solar energy in geosynchronous orbit?

Stargazing Which Mid-Priced Telescope Should I Choose?

Graduate Black Hole Falling in / Observer Perspective Question

Graduate Just how spherical is a neutron star?

High School Is it true that the earth's rotation is slowing down?

Undergrad New Teacher Seeks Help on Universe Expansion & Space

Graduate What is the True Meaning of 'Nothing' in A Universe from Nothing?

Graduate Are You Using the Correct Formula to Convert Redshift to Megaparsecs?

Graduate Can Black Hole Evaporation Preserve Entropy While Losing Mass?

High School Difference between shock wave and shock ?

High School How Universe is Born: Start of Universe

Undergrad The meaning of z number in red shift

Undergrad How do we know space is not infinite?

Graduate Universal Expansion and the Distribution of Light

Graduate How long ago did inflation end in the universe?

Graduate Could a Neutron Star's Color be Rayleigh-Jeans Blue?

Graduate Are thermalized neutrinos stable at temperatures their rest energy?

High School Indoor Astronomy: Viewing Options for Cold Places

Graduate Some clarity on Black Hole Theory and Observations.

Undergrad Why does Venus have an atmosphere?

Undergrad Life on Europa vs. Jupiter's Electromagnetic field

Graduate If A Kind Soul Would Be Willing - Reality Check

Graduate A question on virtual antiparticles and Hawking Radiation

Graduate Why Is a Distant Galaxy Blue Despite Redshift?

Graduate Are Black Holes Deceivingly Still?

Graduate Current value of the scale factor(R₀)?

Graduate What is the current value of the scale factor?

Graduate Has the Universe's Entropy Decreased Over Time?

Graduate Dark Energy & Expansion of the Universe; Really ?

Graduate Weinberg's Cosmology: Neglecting (1+z(eq)) in Denominator

Undergrad Why is Venus's atmosphere so hot?

Graduate I'd like to know your interpretation.

Graduate Why Do Pulsars Emit Radiation Despite Being Current Loops?

Graduate Why Doesn't Dark Matter Collapse into Black Holes Like Regular Matter?

Graduate Protogalactic clouds vs protogalaxies help