Hailey Alexander
Astronomy teacher | Tutor for 6 years
大家太热情了，被挤爆了，请稍后再试试呢 ~
Questions
What is the refractive index?
What does the universe expanding mean?
What was the size of the universe before the big bang?
How fast is the universe expanding per second?
What gasses did the extensive volcanic eruptions add to the atmosphere in the early in the history of Earth?
How big is our solar system?
What proof is there that the Big Bang Theory is incorrect?
What is the name of the nearest star to Earth that is a main sequence star please?
Which is hotter, the earth's core or the sun?
If the span of the universe was converted from light years to miles, what would it measure?
What are convection currents and how do they relate to the movement of the tectonic plates?
What happens when the speed of rotation of the earth slows down?
How does cosmic background radiation change the universe?
How long does it take most massive stars end their life?
Why do red giants expand?
If you know that the period is 76 years and the semi major axis is 17.94 AU, how do you calculate the distances of the perihelion and aphelion?
Do other planets aside from Saturn have rings?
Is there a larger star than YV Canis Majoris?
What is the difference between the Milky Way and the Milky Way Galaxy?
Has the crust over which we live already been subjected to electron degeneracy pressure? What about planets like Jupiter, Saturn which are not as dense as the inner planets?