1.4 Stellar masses and stellar evolution
Stars can necessarily be observed only at a distance. This unit introduces the Hertzsprung–Russell diagram, an essential tool in understanding the nature of stars. You should have some understanding of the basic stellar properties of luminosity and temperature in order to get the most from the unit.
Author(s): The Open University

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The H–R diagram
Stars can necessarily be observed only at a distance. This unit introduces the Hertzsprung–Russell diagram, an essential tool in understanding the nature of stars. You should have some understanding of the basic stellar properties of luminosity and temperature in order to get the most from the unit.
Author(s): The Open University

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2.5 Using stars to probe the interstellar medium
Stars can necessarily be observed only at a distance. This unit introduces the Hertzsprung–Russell diagram, an essential tool in understanding the nature of stars. You should have some understanding of the basic stellar properties of luminosity and temperature in order to get the most from the unit.
Author(s): The Open University

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2.4 The effect of interstellar dust
Stars can necessarily be observed only at a distance. This unit introduces the Hertzsprung–Russell diagram, an essential tool in understanding the nature of stars. You should have some understanding of the basic stellar properties of luminosity and temperature in order to get the most from the unit.
Author(s): The Open University

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2.3 The effect of interstellar gas
Stars can necessarily be observed only at a distance. This unit introduces the Hertzsprung–Russell diagram, an essential tool in understanding the nature of stars. You should have some understanding of the basic stellar properties of luminosity and temperature in order to get the most from the unit.
Author(s): The Open University

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2.1 Introduction
Stars can necessarily be observed only at a distance. This unit introduces the Hertzsprung–Russell diagram, an essential tool in understanding the nature of stars. You should have some understanding of the basic stellar properties of luminosity and temperature in order to get the most from the unit.
Author(s): The Open University

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Licensed under a Creative Commons Attribution - NonCommercial-ShareAlike 2.0 Licence - see http://creativecommons.org/licenses/by-nc-sa/2.0/uk/ - Original copyright The Open University

1.4 Stellar masses and stellar evolution
Stars can necessarily be observed only at a distance. This unit introduces the Hertzsprung–Russell diagram, an essential tool in understanding the nature of stars. You should have some understanding of the basic stellar properties of luminosity and temperature in order to get the most from the unit.
Author(s): The Open University

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1.2 The main classes of stars
Stars can necessarily be observed only at a distance. This unit introduces the Hertzsprung–Russell diagram, an essential tool in understanding the nature of stars. You should have some understanding of the basic stellar properties of luminosity and temperature in order to get the most from the unit.
Author(s): The Open University

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Licensed under a Creative Commons Attribution - NonCommercial-ShareAlike 2.0 Licence - see http://creativecommons.org/licenses/by-nc-sa/2.0/uk/ - Original copyright The Open University

1.1 Constructing the H–R diagram
Stars can necessarily be observed only at a distance. This unit introduces the Hertzsprung–Russell diagram, an essential tool in understanding the nature of stars. You should have some understanding of the basic stellar properties of luminosity and temperature in order to get the most from the unit.
Author(s): The Open University

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Licensed under a Creative Commons Attribution - NonCommercial-ShareAlike 2.0 Licence - see http://creativecommons.org/licenses/by-nc-sa/2.0/uk/ - Original copyright The Open University

Introduction
Stars can necessarily be observed only at a distance. This unit introduces the Hertzsprung–Russell diagram, an essential tool in understanding the nature of stars. You should have some understanding of the basic stellar properties of luminosity and temperature in order to get the most from the unit.
Author(s): The Open University

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2.8 End of unit question
Climate change is a key issue on today’s social and political agenda. This unit explores the basic science that underpins climate change and global warming.
Author(s): The Open University

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2.5 A ‘collective picture of a warming world’
Climate change is a key issue on today’s social and political agenda. This unit explores the basic science that underpins climate change and global warming.
Author(s): The Open University

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2.4 The meaning of ‘consensus’: peer review and the IPCC process
Climate change is a key issue on today’s social and political agenda. This unit explores the basic science that underpins climate change and global warming.
Author(s): The Open University

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2.3 Contested science: a case study
Climate change is a key issue on today’s social and political agenda. This unit explores the basic science that underpins climate change and global warming.
Author(s): The Open University

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1.2.2 Bringing in the atmosphere: the natural greenhouse effect
Climate change is a key issue on today’s social and political agenda. This unit explores the basic science that underpins climate change and global warming.
Author(s): The Open University

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1.6 The human impact on the atmosphere: the coming of the industrial age
Climate change is a key issue on today’s social and political agenda. This unit explores the basic science that underpins climate change and global warming.
Author(s): The Open University

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1.4 An overview of the global energy budget
Climate change is a key issue on today’s social and political agenda. This unit explores the basic science that underpins climate change and global warming.
Author(s): The Open University

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5 Summary
Genetic manipulation of crops is an issue of great current interest and controversy. This unit covers some of the basic science that underpins the debate and examines the hotly contested case study of the development of ‘Golden Rice’. By looking at the science 'behind the headlines' you will acquire a clearer idea of both what is possible in GM science and what may be desirable.
Author(s): The Open University

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4.4 The ongoing story
Genetic manipulation of crops is an issue of great current interest and controversy. This unit covers some of the basic science that underpins the debate and examines the hotly contested case study of the development of ‘Golden Rice’. By looking at the science 'behind the headlines' you will acquire a clearer idea of both what is possible in GM science and what may be desirable.
Author(s): The Open University

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Introduction to case study
Genetic manipulation of crops is an issue of great current interest and controversy. This unit covers some of the basic science that underpins the debate and examines the hotly contested case study of the development of ‘Golden Rice’. By looking at the science 'behind the headlines' you will acquire a clearer idea of both what is possible in GM science and what may be desirable.
Author(s): The Open University

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Except for third party materials and otherwise stated (see http://www.open.ac.uk/conditions terms and conditions), this content is made available under a http://creativecommons.org/licenses/by-nc-sa/2