Nasa: Imagine the Universe: "Burst Behind the Sun"

British astronomer Sir Fred Hoyle first coined the term the Big Bang in 1950. The theory explains much of what we have observed in the universe, but it does leave some things unexplained. The video discusses the Cosmic Inflation...

Sal makes a relatable comparison for pupils to understand the universe's relative size. The progression from a man's size to a galaxy's size is explained in terms of each object relative to the next. The multiple objects we can process...

Supernovae are divided into two basic physical types, including a description of supernova types and how they are classified based on the existence of hydrogen spectral lines. Definitions of key terms are provided.

This helpful site provides everything you want to know about studying the universe. Take a look at the tools and methods scientists use to study the universe, discover some of the objects that make up our universe, learn how scientists...

Describes quasars as being classified within the category of an active galaxy. A description of the emergence of high-energy. Definitions of key words are provided.gamma-ray quasars as an important component of the gamma-ray sky.

A brief description of supernova remnants with many embedded links to help define terms used in the description. The specific topics are age and the importance of remnants to us and the types. Definitions of key words are provided.

Here's the place to find support on a range of space-based astronomical topics. Check the main topics covered and the archived files, or send an email to the experts!

Frequently asked questions are answered about gamma rays.

Where did our sun come from? Scientists believe that the sun and our solar system was born from a supernova. Part two of this five-part series explains the sun's plasma, magnetic field, sunlight, and something called flux ropes. This is...

Solar storms is the topic of part four of the five-part series on the secrets of the sun. Learn about auroras, CMEs, solar flares and the damage it could cause here on Earth. The most interesting fact in this clip is the fact that solar...