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Listed under:  Science  >  Earth and space  >  Universe  >  Planets
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Triple J: Why is Pluto not a planet?

Watch this clip and learn why Pluto was taken off the official list of planets. Dr Karl Kruszelnicki explains the three criteria that must be met before planets can be called planets. What are they?

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Why we can see some planets but not others

In this planetarium demonstration, the air has been sucked out of the sky to give us a black sky so we can actually see the planets that are above us. Why is it that we can't always see the planets? How does our proximity to the sun affect how visible a planet is to us?

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Mysteries of the solar system

This is a web resource that contains mysterious photos of various aspects of planets in our solar system and shows how further space exploration helped to explain the mysteries. Each initial image has an engaging title, explains how the image was obtained and why the image was deemed to be mysterious. The subsequent image, ...

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Our world: what is a solar system?

This is a NASA 'Our World' video clip exploring the largest objects found in the solar system. The narrators of the clip include an enthusiastic young student, a synthesised voice and an amateur astronomer who address the issues of what exactly is a solar system and how the major celestial objects making up our solar system ...

Interactive

Sites2See: Astronomy for primary

A small galaxy of sites and resources, from Galileo making discoveries that changed our view of the universe, to new images and understandings from Hubble, on a page tailored for Primary students.

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Solar wind gives asteroids a tanning

This brief ABC News in Science article from 2009 explains that asteroids become redder the longer they stay out in the sun because of the solar wind. Scientists are using this to try to find our more about our planetary origins.

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Catalyst: Scaling down our solar system

Can you imagine how huge the Sun is, or how far away planets such as Saturn are? Watch this clip to discover how 'mind-bending-ly big' the solar system is. Presenter, Bernie Hobbs, scales down the the solar system to fit into a football field to demonstrate the relative sizes and distances of the Sun and planets. Find out ...

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How the sky works

This ABC Astronomy Basics article is an excellent example of simple explanations of many of the phenomena we observe in the sky. Features such as constellations, neighbouring galaxies and nebulae are outlined. It explains that finding constellations and planets in the ever-moving night sky can be challenging. It gives tips ...

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Gravity and the Solar System

Students use this resource consisting of seven slides with diagrams, written explanation and voice-over to understand how the movement of planets around the sun is related to gravitational forces. There is a two-question quiz and a summary slide.

Interactive

Year Length

Students use this resource consisting of three animated slides with diagrams, written explanation and voice-over to understand the length of a year. It could also be used to demonstrate day length and the duration of the moon's orbit. There is a two-question quiz and a summary slide.

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Solar System Quiz

This is a non-threatening ten question multiple choice quiz that gives students feedback on their understanding of our solar system that continues to reveal amazing facts and inspire some out-of-this-world fantasy. Excellent explanations given in the feedback. A useful resource to stimulate discussion or establish student ...

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Orrery, c1770 - part 1

This is a close-up of a mechanical model of part of the solar system, commonly known as an orrery, made by renowned London instrument maker Benjamin Martin in about 1770. This bronze model features a cylindrical clockwork mechanism with an orb representing the Sun placed in the centre. Extending from this on an arm is a ...