Where can I find the ephemeris?

What is an ephemeris?

The chronology of the discovery of the solar system has.

If you want to know other details about the stars and the nine planets, you can go to the "Star Paradise" to find, ** is www.

american ephemeris for the 20th century: 1900 to 2000 at midnight/5th revised）

From 1900 to 2000, the price was 340 yuan.

Ephemeris for 6000 years - astrodienst

What do you mean by the astronomical almanac? A supplement for astronomy enthusiasts is the 2006 Astronomical Almanac, which forecasts the astronomical events of the year and the orbits of the planets.

Astronomical almanacs compiled for astronomical surveys almost always contain the equatorial coordinates of the aforementioned celestial bodies, as they are commonly used in astronomical observations with astronomical charts and telescopes, and the epochs used in the compilation must be indicated. Most of the epochs used today are based on the basis of calculations (some ephemeris used for high-precision measurements are even based on the epochs of the year), and some astronomical almanacs compiled in the 20th century are still used.

The difference between an astronomical almanac and an ephemeris is that the astronomical almanac (especially the civil astronomical almanac) will publish the observation data that are more commonly used by astronomy enthusiasts, including the equatorial coordinates of the moon, planets, major asteroids or comets, as well as information such as angular distance from the sun, brightness, distance from the earth, running speed, apparent diameter, phase and haunting, time of the upper mid-heaven, etc., or the ** longitude of Mars and Jupiter, the annual position of the planetary satellites, and Saturn will include the inclination of the ring, etc. Favorable time for astrophotographers** to shoot. Other aspects include the time of the meteor shower, the time when the variable star is extremely bright, etc.

Ephemeris and ephemeris are the so-called almanacs in China, which records the daily health of the stars, and can quickly find out the precise position of the stars. A list of the positions of celestial bodies on different dates, or a book with many ephemeris. The ephemeris, or almanac for short, is derived from the Greek ephemero', which contains a table of data on the location of one or more celestial bodies at a specific time of day, often accompanied by other supplementary materials; And the astronomical almanac is also a type of ephemeris.

Ephemeris refers to the precise position or trajectory table of celestial bodies that changes over time in GPS measurements, which is a function of time. In specific applications, there is a distinction between "broadcast ephemeris" and post-processing "precision ephemeris".