Pulse ring instrument located at the observatory.
Highlights
The Sun remains perpendicular to the Equator twice a year on 21st March and 23rd September. This phenomenon can be clearly seen through the cone and pulse instrument of the observatory. After this, the Sun will slowly start entering the Southern Hemisphere from the Northern Hemisphere.
Naiduniya Representative, Ujjain (Astronomical Event). Due to the Sun being perpendicular to the equator, the duration of day and night will be equal on 23 September. That is, day and night will be of 12 hours each. In astronomy, this event is called Sharad Sampat. This astronomical event can be seen on the cone and pulse instrument in the Government Jiwaji Observatory.
Jiwaji Observatory Superintendent Prof. Dr. Rajendra Prakash Gupta said that the earth revolves around the sun. Due to this, we see the sun moving from the Tropic of Cancer to the Tropic of Capricorn. During this, the sun remains perpendicular to the equator twice a year on 21st March and 23rd September, due to which the duration of day and night is equal.
On 23rd September, the Sun’s revolution will be at 0 degrees 16 minutes and 56 seconds south and the Sun’s position in the Sayan zodiac Libra will be at 0 degrees 43 minutes and 28 seconds. This means that the Sun will start entering the Southern Hemisphere from the Northern Hemisphere.
The phenomenon will be directly visible on the cone and pulse ring instrument
Dr. Gupta said that the event of Sharad Sampat can be clearly seen through the cone and nadivalaya instrument. On 23rd September, the shadow of the cone on the cone instrument will be seen moving straight on the equator throughout the day.
Similarly, on the Nadivalaya instrument, sunlight was visible on the northern hemisphere at present. On 23rd September, sunlight will not be visible on any of the northern and southern hemispheres. From the next day i.e. 24th September to 20th March, sunlight will be visible on the southern hemisphere. In this way, we can see the change of hemisphere of the sun on the Nadivalaya instrument.