Au

Electromagnetic waves

Focus for electromagnetic waves

Gravitational waves, neutrinos

Focus for gravitational waves, neutrinos

Figure 8.2. The Sun bending light acts as a lens.

Gravitational waves, neutrinos

Focus for electromagnetic waves

Focus for gravitational waves, neutrinos

Figure 8.2. The Sun bending light acts as a lens.

Sun radius: when r is equal to the Sun radius, starlight rays focus at the point closest to Earth. This minimum focus is located at a distance about 542 AU (in fact, focus distance depends also on the light wavelength).

Calculations show that the angular and spatial resolution made possible by observing objects through this powerful "lens" are worth noticing. The resolution is a function not only of the gain due to the lensing effect of the Sun, but also of the gain of the antenna on the spacecraft, proportional to its dish radius, rantenna. The total gain is, in fact, the product of the two [Maccone, 2002, p. 12]:

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Solar Panel Basics

Solar Panel Basics

Global warming is a huge problem which will significantly affect every country in the world. Many people all over the world are trying to do whatever they can to help combat the effects of global warming. One of the ways that people can fight global warming is to reduce their dependence on non-renewable energy sources like oil and petroleum based products.

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