Category Archives: Uncategorized

Sets, groups, fields, vector spaces and algebras

Sets, groups, fields, vector spaces and algebras

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MACHOs and seeing distant objects with a gravitational lens

MACHOs and seeing distant objects with a gravitational lens

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Gravitational lensing – large angles

Gravitational lensing – large angles

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Gravitational lensing – the twin quasar

Gravitational lensing – the twin quasar

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Gravitational lensing – image brightness

Gravitational lensing – image brightness

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Gravitational lensing and the Einstein ring

Gravitational lensing and the Einstein ring

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Deflection of light by the sun

Deflection of light by the sun

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Deflection of light by a mass

Deflection of light by a mass

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Local flat frame for a circular orbit

Local flat frame for a circular orbit

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Circular orbit – appearance to a falling observer

Circular orbit – appearance to a falling observer

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