Alberto Contreras

How Fast Do Shooting Stars Move Through the Sky?

Are There Shadows on the Moon?

Why Don’t the Constellations Change?

What Would Happen If the Earth Was 1 Inch Closer to the Sun?

How Does the Lunar Eclipse Affect Us and the Earth?

What Place on Earth Has the Least Gravity?

Is the Moon Inside Earth’s Atmosphere?

Why Did Ptolemy Believe in the Geocentric Model?

Why Can’t We See the Milky Way?

What Is the First Star in the Sky at Night?

Can the Moon Be Purple? The Science Behind Moon Colors

Do You Need Glasses for a Lunar Eclipse?

Why Is the North Star Always North?

Is a Birthday Really a Trip Around the Sun?

Are the Stars Different in the Southern Hemisphere?

Is It Safe to Go Outside During a Lunar Eclipse?

When Is the Andromeda Galaxy Visible From Earth?

What Causes Day and Night to Occur?

What Objects Are Found in the Mesosphere?

How Many Degrees Does the Earth Rotate Each Hour?