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 size of the universe?
What is our solar system made of?
A stable star is in gravitational equilibrium. What does this mean?
How deep is the earth's core?
How does earth orbit the sun?
How does most energy from the sun reach Earth?
When was the moon formed in relation to the earth?
What was the primary role of dust in the formation of the solar system?
Why does the size of the universe change?
How does looking at the sun damage your eye?
How far is the earth from the sun?
Why is there no life on the sun and other stars?
How often does perihelion occur in an orbit?
Why are variable stars important? What do they tell us?
Why doesn't the frequency of light change?
Which is the nearest supergiant star to Earth?
When is a star considered a white dwarf?
What planets have man-made satellites orbiting them?
Wavelengths of light from a distant galaxy are found to be 0.44% longer than the corresponding wavelengths measured in a terrestrial laboratory. What is the speed that the wave is approaching?
What might be causing the universe to accelerate?