What is the Big Crunch?
A brief description of what will happen if the universe stops expanding and collapses back on itself - this is known as the Big Crunch.
31 Touko 20221min
What are the Basic Properties of Astronomical Objects?
A brief description of the basic properties of astronomical objects such as mass, radius, distance, luminosity, and temperature.
18 Touko 20222min
What is the Local Group of Galaxies?
A brief description of the Local Group of galaxies which contains the Milky Way, the Andromeda galaxy, and dozens of dwarf galaxies all gravitationally bound to each other.
10 Touko 20221min
What Does it Mean to “Know” Something in Science?
A brief description of what scientists mean when they say we "know" something.
10 Huhti 20221min
How Can Atoms and Thus Matter be Mostly Empty Space?
A brief description of the structure of atoms - how they are mostly empty space - and why the everyday objects you use don't collapse and fall in on themselves.
8 Huhti 20221min
What are Interacting Galaxies?
A brief description of what we mean when we talk about interacting galaxies.
9 Maalis 20221min
How do the Sun and Other Stars Shine?
A brief description of nuclear fusion, which is the process by which stars produce light so that they can shine.
9 Maalis 20221min
What are Giant Molecular Clouds?
A brief description of giant molecular clouds and why they are important for stars.
25 Helmi 20221min
