• 8 Planets
  • Andy Darvill Space Questions
  • BBC GCSE Bitesize Earth & Beyond
  • Big Bang vs. Steady State

    BBC website with video clips discussing the evidence for the two theories

  • Black Hole

    An artists impression of a black hole, an area in space so massive, with gravity so extreme, that nothing can escape (not even light), swallowing a nearby star. Said to have been detected by Nasa's Chandra Observatory and the Hubble telescope


    Cosmic Microwave Background image from the COBE satellite. CMB is thought to originate from photons of light created just after the Big Bang and released as the Universe cooled. The wavelengths have been stretched and now shows up everywhere in the Universe a microwave radiation. Colour variations represent very small changes in temperature.


    More detailed CMB image with the signal from our Galaxy removed showing temperature fluctuations of +-200 microKelvin

  • Copernican Model Sun Centred
  • Cosmic Microwave Background

    Brian Cox tunes in to the remnants of light from the Big Bang to witness the oldest light in the Universe.

  • Cosmic timeline

    From the Big Bang to the present day. One picture, 15 billion years.

  • Cosmic Timeline
  • Cosmology
  • Crab nebula

    A supernova remnant some 6,500 light years from Earth. Probably exploding in 1054 AD

  • Doppler shift spectrum
  • Doppler Wave Fronts

    Simple representation of the doppler effect caused by a car moving

  • Eagle nebula

    A region of current star formation, subject of the famous 'Pillars of Creation' photograph, some 6,500 light years away.

  • Einstein gravity time warp
  • Einstein's Relativity

    Einstein's theory of relativity

  • Feather and hammer on the moon

    Apollo 15 crew carry out the famous Galileo hammer and feather experiment on the moon

  • Galileo

    Portrait of Galileo Galilei. Oil on canvas by Domenico Tintoretto 1605-1606 from the photo gallery at the Museo Galileo, Florence, Itlay

  • Galileo and Jupiter's moons

    A short video about Galileo's first use of a telescope

  • Galileo's telescopes 1

    Galileo's telescopes in their glass case at the Institute e Museo di Storia della Scienza Firenze in Florence, Italy

  • Galileo's telescopes 2

    Galileo's telescopes alongside each other outside of their glass case at the Institute e Museo di Storia della Scienza Firenze in Florence, Italy

  • GCSE.com Space
  • gcsescience.com
  • Geocentric & Heliocentric models

    A short, informative, but slightly annoying video with good visuals of the two models

  • History of the Universe - Part 1

    A nice romp through the history of the Universe

  • History of the Universe - Part 2

    Second part including the life cycle of the sun

  • Horsehead nebula

    Image from the Canada-France-Hawaii telescope in Hawaii. The horsehead is just a portion of the dustcloud.

  • How the Sun will die

    Short film showing what will happen to the Earth and the impact of a red giant on the inner planets

  • Hubble Law Lab

    Instructions for measuring the Hubble Constant

  • Large Sun (Star)

    Stars with more than 5 times the mass of our Sun run out of fuel and form red supergiants with very hot cores, hot enough to produce Fe and Ni. Further layer will produce Si, S then O, Ne, Mg and finally Ne and He.

  • Length of Day

    A clever animation showing the sun's shadow across the earth together with the earth's relative position in its path around the sun and a running calendar.

  • Life and death of a star

    Great visual but really needs a voiceover

  • Life cycle of a star

    High school project. Well explained

  • Life cycle of a star

    Another excellent Doodle Science animation (1.58)

  • Life cycle of stars

    Image showing the life cycle of our Sun and more massive stars.

  • Life cycle of stars

    Explains how we believe stars are born, live and die and the different ends to different sized stars.

  • Life of a star

    Showing the life cycle of a star

  • Line Spectra

    Short animated file explaining all forms of line spectra

  • Magnetoshpere

    Earth's magnetic protection

  • Neutron star

    Resulting from the death of massive stars 4 to 8 times the size of our Sun. A neutron star is so dense that on Earth one teaspoon would have a mass of a billion tons. Usually about 20km in diameter with a mass 1.4 times that of Earth.

  • Observing the Universe - IR

    Brief video explaining how the Herschel space telescope is using infrared radiation to look out into space. IR doesn't pass through the Earth's atmosphere so the telescope has to be outside of the atmosphere

  • Orbits

    A great little animation that can be used at a variety of levels from showing asteroids at the simplest to more complex relationships between planet, sun and moon, as well as user-defined plots.

  • Orion nebula

    Visible to the naked eye, just south of Orion's belt. 24 light years across and 1,500 light years away, it is the nearest stellar nursery to Earth with around 700 stars in all stages of formation.

  • PhET Gravity and orbits

    Another PhET animation that can be used to demonstrate the forces, speed and velocity associated with a planet orbiting a star

  • Physics-gcse.com
  • Polar orbit

    A straight forward clip showing a polar orbitting satellite passing along (around) the earth from pole to pole several times in a day.

  • Radiotelescope - Arecibo

    Picture courtesy of the NAIC - Arecibo Observatory, a facility of the NSF.
    The World's largest and most sensitive radiotelescope located in Arecibo, Puerto Rico.
    305m fixed reflecting surface suspended in a natural limestone sinkhole. The receiver is supported some 150m above. Used by, amongst others, SETI. Opened Nov 1963

  • Radiotelescope - Very Large Array

    Very Large Array in New Mexico is composed of 27, 25 metre diameter, antenna in a Y-shape formation, on rail tracks, electronically combined to give the resolution of an antenna 36 km across and the sensitivity of a dish 130m across.

  • Red giant

    At the death of a star of similar size to our Sun, the hydrogen runs out and the star starts to collapse. The core temperature rises as helium fuses to form Carbon, Nitrogen and Oxygen and the star swells.

  • Red Supergiant c.f. our Sun

    Nasa images compiled to give an indication of the relative sizes of our planets, Sun and other bodies such as Red Giants and a Red Supergiant (Betelguese)

  • Red Supergiant c.f. our Sun 2

    Indication of size:
    Sirius is the brightest star in the sky
    Pollux, about 34 light years away was the first star to be confirmed with an extrasolar planet.
    Aldebaran is a red giant about 65 light years away.
    Betelgeuse is a red supergiant, as is Antares

  • Ritter - UV

    Starting with Ritter's experiment with photographic paper, this short video (3.40) goes on to look at UV-A, UV-B and UV-C before going on to briefly descrive their use in space exploration

  • S-Cool
  • Scale of the Universe

    A nice flash showing the scale of the Universe from the very small to the very big

  • SETI

    SETI - Search for Extra Terrestrial Intelligence

  • Solar System

    A fascinating tour through our solar sytem, based on NASA's Science on a Sphere program "The Wanderers". (14.46)

  • Supernova

    An exploding star will supernova and this can last weeks or months. The resulting explosion can trigger new star formation.The last supernova to be seen in the Milky Way was in 1604.

  • The 8 planets

    A modern representation of the 8 planets with Pluto listed as a planetoid. Author unknown.

  • The Big Bang Theory
  • The death of stars and black holes

    ASTR 100 Honours project from the research school of astronomy and astrophysics from the Australian National University.

  • The Electromagnetic Spectrum - Microwaves

    Short video (3.23). Looking in a bit more depth at microwave radiation. Includes CMB

  • The Electromagnetic Spectrum - NASA

    Introduction to the elctromagnetic spectrum with links to each of the areas.

  • The Electromagnetic Spectrum - NASA

    Short video (5.20). Introduction to the electromagnetic spectrum with a look at each of the wavelengths in turn.

  • The Electromagnetic Spectrum - Radio Waves

    Short video (3.58). Looking in a bit more depth at radio waves from their first transmission at the end of the 19th Century.

  • The S.E.T.I. song

    A short video poking fun at S.E.T.I. and their lack of alien contact. Have a look at some of their other stuff it's great

  • Weight and Mass

    One of a series of slightly zany physics tutorials - stick with it, they're good. This one compares weight with mass.

  • Weightless

    "Movement in Microgravity: Skylab to Space Shuttle" 1988 NASA Weightlessness Footage

  • White dwarf

    A dying star, no longer undergoing fusion, with a mass similar to our Sun and a size similar to Earth. A White Dwarf will cool to a Black Dwarf.

  • Why telescopes in space ?

    Water vapour in the atmosphere absorbs infra red.
    Visible light makes it through the atmosphere but images are blurred
    The Earth's atmosphere blocks X-rays and gamma rays..