Astronomical Instruments

I made this for my Science Report about Astronomical Instruments and I thought, why not share with you? So yeah.

1. CORONAGRAPH A coronagraph is a telescope that can see things very close to the Sun. It uses a disk to block the Sun's bright surface, revealing the faint solar  corona , stars, planets and sungrazing comets. In other words, a coronagraph produces an artificial solar eclipse . JLDC

2. CORONAGRAPH Coronagraph image of the sun Coronagraph samples JLDC

3. MAGNETOMETER A magnetometer is a measurement instrument used for two general purposes: | to measure the  magnetization  of a magnetic material like a  ferromagnet | to measure the strength and, in some cases, the direction of the  magnetic field  at a point in space What is a “magnetometer?” JLDC

4. MAGNETOMETER The first magnetometer was invented by  Carl Gauss  in 1833 and notable developments in the 19th century included the  Hall Effect  which is still widely used. JLDC

5. MAGNETOMETER Helium Vector Magnetometer (HVM) of the  Pioneer 10  and  11  spacecraft JLDC

6. MAGNETOMETER Magnetometers are widely used for measuring the Earth's magnetic field and in geophysical surveys to detect magnetic anomalies of various types. They are also used militarily to detect submarines . Magnetometers can be used as  metal detectors : they can detect only magnetic (ferrous) metals , but can detect such metals at a much larger depth than conventional metal detectors; they are capable of detecting large objects, such as cars. JLDC

7. MAGNETOMETER There are 2 basic types of magnetometer measurement: | Vector magnetometers - measure the vector components of a magnetic field | Total field magnetometers or scalar magnetometers - measure the magnitude of the vector magnetic field JLDC

8. TELLURION A  tellurion   is a  clock , typically of French or Swiss origin, surmounted by a mechanism that depicts how day, night and the seasons are caused by the movement of the Earth on its  axis  and its orbit around the sun. The clock normally also displays the age of the moon, and the four-year (perpetual) calendar. JLDC

9. TELLURION It is related to the  orrery , which illustrates the positions and motions of the planets and moons in the solar system in a heliocentric model. The word  tellurion  derives from the Latin  tellus , meaning  Earth . JLDC

10. TELLURION A tellurion made in 1766, used by John Winthrop  to teach astronomy at Harvard JLDC

11. HELIOSCOPE A   helioscope  is an instrument used in observing the  sun  and sun spots . The method involves projecting an image of the sun onto a white sheet of paper suspended in a darkened room with the use of a telescope . JLDC

12. HELIOSCOPE JLDC

13. HELIOSCOPE The helioscope was first used by  Benedetto Castelli and refined by  Galileo . Benedetto Castelli Galileo Galilei JLDC