Astronomy, Astrophysics, Cosmology Forum

High School Are There Stars Primarily Composed of Helium?

Graduate 3pi/Lambda = area of cosmological horizon

Graduate Cosmological redshift: how much energy has gone missing?

Graduate Lee Smolin predicted dark energy back in 1995

High School What initiates star birth and how does gravity focus debris into a star?

Graduate A toolkit for working with natural units

Graduate One theory is that the higgs particle gives matter mass

Graduate What are the galactic coordinates of the Cosmic Microwave Background hotspot?

Graduate How long before the sun goes red giant?

Graduate What is the quantitative understanding of Hawking radiation from a black hole?

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Graduate What prevents black hole singularities from being reached?

Graduate Understanding Rho Crit: The Critical Density of the Universe

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Graduate What is the critical density of the universe?

Graduate SauwIs the concept of finite space in infinite time scientifically valid?

Undergrad Are fundamental physical laws dependent on our choice of units of measurement?

Graduate Are There Explanations for Solar Neutrino Anomalies and Hot Jupiters?

Stargazing Effects of a massive object on light and its relation to the 1919 Eclipse

Undergrad Astronomer107 and the surface gravity of a black hole

Graduate What's your favorite brief survey of modern cosmology?

Stargazing Check Out the Lunar Eclipse Tonight - Night Calculator

Graduate Question re GP-3 orbiting gyroscopes test of relativity

Graduate Z/A in the Chandrasekhar formula

Graduate Why does gravity occur?

Undergrad Which nearby star system should we target for interstellar missions?

Graduate In 1998 Hubble volume meant a cube 12 billion LY on a side

Graduate Early planetary formation thought

Graduate Is Photon Energy Lost or Conserved in Cosmological Redshift?

Graduate What Secrets Do Solar Rings and Shadow Matter Hold?

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Graduate The Hawking wattage of a black hole

Graduate The principle of least action/time, and geodesics of spacetime

Undergrad What is a Hubble volume?

Graduate Radius of cosmological mass-energy symmetry?

Graduate Can the Infinite Time Theory Be Refuted in Cosmology?

Graduate What happened before the Big Bang?

High School This seems kind of weird, but is there really no such thing as gravity in

Undergrad Photon structure - light decyphering

Undergrad What creates the tail of a comet as it moves through space?

Graduate A great 16 page paper in quantum cosmology

Graduate Nything beyond the known universe boundaries?

Graduate Dimensionless cosmology-getting rid of units

Undergrad Why isn't the universe shaped like a bubble with a void in the middle?

Graduate What is false vacuum and can it collapse from high-energy events?

Undergrad How is transit time accounted for in universe age estimates?

Graduate Is there an anti-space analogous to antimatter?

Graduate Are Refinements to Newton’s Calculations Necessary?

Graduate What is the weight of a copy at Earth's average distance from the sun?

Graduate Can the finite space and energy with infinite time theory be refuted?

Graduate Problems with big bang theory expansion and isotropy

Undergrad Is There a Reason for the Unique Shape of This Galaxy?

Graduate The Physics of Immortality: Fact or Fiction?

Graduate What does one calorie per cubic mile mean to you?

High School Is Interstellar Travel Feasible with Current Physics?

Graduate What are your ideas about describing Planck units?

Graduate Are black holes regions of absolute zero with no mass or fluctuations?

Graduate What experiments confirm the big bang theory?

Undergrad S.A.R.S Could this be the result of inbound Particles

Graduate Alternative forms of the Friedmann equations

High School Anybody know the name of this mission?

Graduate Could Suicidal Black Holes Evolve Due to Their Charge and Hawking Radiation?

Undergrad Does light accelerate when approaching a black hole?

Graduate If you go fast enough will you turn into a black hole

Graduate Are there more than two types of charges in spacetime?

Graduate (Not folding space) Instant Travel Form A-B? But Not Time (theory)

Graduate Can Inflation Theory Explain the Curious Behavior of Gravity?

Undergrad Where does galactic kinetic energy come from?

High School How wide is the Milky Way and how can we see it from inside?

Graduate How quantized space affects graviton transmission in collapsing matter

Undergrad Why do we skip leap year every 100 years instead of every 25?

High School How far does the earth travel in one year?

Graduate Why do galaxy clusters form sheets?

Graduate Is the Level I Multiverse the Most Popular Cosmological Model Today?

Graduate Why 1 dimensional discrete space?

Graduate It's Official-The Universe is Absurd

Graduate What is the importance of hadronic matter in physics?

Undergrad Why does Einstein's Cross show four images instead of a distorted ring?

Undergrad Finding individual masses of visual binary stars from orbital period

Graduate Electrons in intergalactic space.

Graduate Does a flat dust-dominated universe with positive cosmological constant expand forever?

Graduate Philosophy of Nature. Time and Space

High School Physics of colliding stars for a school project

Graduate IN the Future Blackholes or Wormholes

Graduate So, Is the gravity of a light emmitting star really decreasing as 1/r?

Graduate Speed of Gravity = c: Does Traveling at C Affect Gravity?

Graduate Do Black Holes and Wormholes Affect Time and Space Similarly?

Graduate Is there a prediction for the frequency of a gravity wave?

Graduate Challenge - A problem in astronomy

Graduate Is Everything a Form of Positive and Negative Space in Matter?

High School Which Voyager spacecraft traveled further: 1 or 2?

Graduate Skinny galaxy harbors massive black hole at core