F

• Born in Germany.
• He discovered the first variable star – Mira, in the constellation of Cetus.

Johannes Fabricius (1587-1615)

• Born in Germany.
• He discovered the Sun’s spots and its revolution.

John Flamsteed (1646-1719)

• Born in England.
• He worked on a star catalogue which was completed by others, the editor being Edmond Halley.

Joseph Fraunhafer (1787-1826)

• Born in Germany.
• He made the best refracting lenses of his day.
• He conducted studies in spectoscopy.
• The dark lines that he found in the band of light that has passed through a prism are named after him.