If you are interested in using quantitative physical methods to understand the building blocks of the Universe, and already have a good background in OU level 2 maths, physics and astronomy, then this is the module for you. This module focuses on the astrophysics of stars and exoplanets – examining their properties, structure, evolution and the physical processes that occur within them. The OU’s Virtual Learning Environment (VLE) and internet-based resources are used throughout the module. You’ll experience real, collaborative astrophysical research, online with a small group of other students, to acquire, reduce, analyse and interpret data.
What you will study
This is a module that builds on skills and concepts you will have developed by studying maths, physics and astronomy at a level equivalent to OU level 2 modules. Although it requires a slightly lower level of mathematics than other OU level 3 physics and astronomy modules, it builds on a broader range of OU level 2 material.
Part 1, Stellar Evolution and Nucleosynthesis, is based around a book which allows you to investigate the properties of stars at different stages of their evolution – how they form, what happens to them as they age, and what becomes of them when they die. You will also explore the physical processes that sustain the energy output of stars during each stage of their evolution and drive the progression from one stage to the next, as well as the relationship between different stages of stellar evolution and the production of the chemical elements. Your study of this part will allow you to develop basic concepts of hydrodynamics, thermodynamics, plasma physics, quantum physics and nuclear physics.
Part 2, Transiting Exoplanets, is based around a book which allows you to explore the methods used in the detection and characterisation of exoplanets, and their physical properties. In 1995 the first planet around a main sequence star other than the Sun was discovered. Since then hundreds of exoplanets have been found, creating one of the most exciting and fast moving research fields in astrophysics. This part focuses on the transiting exoplanets because these are the only planets outside our own solar system with measured sizes. You will explore the methods used to determine the atmospheric properties of transiting exoplanets, to measure the planetary orbit’s alignment with the stellar spin, and to observe the effects of the intense irradiation suffered by some of these planets. You will discover what these measurements imply for reinvigorated theories of planet formation and evolution, and will examines the question ‘is life unique to Earth?’ in the context of exoplanet research.
Part 3, Astrophysical Data Analysis, is rather different from a conventional text. It is a practical component that you study at home, linked via the internet with a small group of students with whom you will work collaboratively on a project involving astrophysical data analysis and interpretation. You will acquire data either from the OU’s robotic telescope (PIRATE) or from the Sloan Digital Sky Survey (SDSS) archive. In the first case you will devise a project based around photometric light curves of newly discovered variable stars, while in the second case you will devise a project concerning optical spectroscopy of previously unstudied quasars. In either case, your group will acquire, reduce, analyse and interpret a unique dataset before presenting a wiki on your findings. You will record your individual project activities in a series of Progress Reports and will contribute to the final group wiki report. Note: although you may express a preference for either the PIRATE version of the project or the SDSS version of the project, we cannot guarantee that you will be allocated the one you prefer. A broadband internet connection is recommended for this project and is particularly important for the PIRATE version where you will be downloading and working with a large volume of data.
Astrophysics (S382) is an OU level 3 module. It builds on study skills and subject knowledge acquired at OU levels 1 and 2.
We’ve designed S382 to follow these four modules:
These parts are especially significant:
- ‘Stellar structure and evolution’ in S284
- ‘Exoplanets’ in S283
- ‘Differentiation and integration’ in MST224.
The parts of S284 relating to active galaxies will prepare you for the SDSS version of the S382 project. The astronomy activities of SXPS288 will better prepare you for the PIRATE version. Both versions require considerable use of IT resources, including downloading data, extensive use of spreadsheets and other analysis software, and contributing to wikis and forums.
Check you’re ready for S382.
Talk to an advisor if you’re not sure you’re ready.
As a result of taking the Are you ready for S382? test, you may find that you need to study a further module or modules before embarking on S382. If this is not possible, you may choose to spend time studying relevant background material. For this purpose we have produced a ‘Book 0’ for S382 (and the related module S383) entitled An introduction to astrophysics and cosmology, which you may download as a PDF. This document covers the recommended background knowledge and skills that we expect students to possess before embarking on S382. If you need to study all the maths, physics and astronomy background contained within this Book 0, we estimate it will require about 40–60 hours of study. It is not a replacement for taking the appropriate OU level 2 modules, but it will serve to fill the gaps in your knowledge in many cases.
You’ll have access to a module website, which includes:
- a week-by-week study planner
- course-specific module materials
- audio and video content
- assignment details and submission section
- online tutorial access.
You’ll also be provided with two printed module books.
You will need
Basic scientific calculator.
You’ll need a desktop or laptop computer with an up-to-date version of 64-bit Windows 10 (note that Windows 7 is no longer supported) and broadband internet access. Any macOS is unsuitable with this module.
To join in spoken conversations in tutorials, we recommend a wired headset (headphones/earphones with a built-in microphone).
Our module websites comply with web standards, and any modern browser is suitable for most activities.
Our OU Study mobile App will operate on all current, supported versions of Android and iOS. It’s not available on Kindle.
It’s also possible to access some module materials on a mobile phone, tablet device or Chromebook; however, as you may be asked to install additional software or use certain applications, you’ll also require a desktop or laptop as described above.