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New Delhi, Jun 20: A rare celestial event, annular solar eclipse, which is popularly known as the "ring of fire" eclipse, will be visible this Sunday in India.

It will be the first solar eclipse of this year takes place on the summer solstice, which is the longest day in the Northern Hemisphere.

While people living along the path annular eclipse passing through Anupgarh, Suratgarh, Sirsa, Jakhal, Kurukshetra, Yamunanagar, Dehradun, Tapowan and Joshimath will be able to see the annular phase, people in rest of India can witness a partial eclipse, said the Ministry of Science and Technology.

When Moon comes between the Sun and Earth, the shadow falls on the surface of the Earth. The Sun is entirely covered by the Moon for a brief period. Those places that are engulfed by the dark, dense umbral shadow of the Moon experience the total solar eclipse. In the regions that plunge into the soft diffused penumbral shadow of the Moon experience the partial eclipse.

"Annular solar eclipse is a particular case of the total solar eclipse. Like the total solar eclipse, the Moon is aligned with the Sun. However, on that day, the apparent size of the Moon happens to be a wee smaller than the Sun. Hence the Moon covers the central part of the Sun, and the rim of the Sun appear like a 'ring of fire' in the sky for a very brief moment" explains Samir Dhurde of The Inter-University Centre for Astronomy and Astrophysics, Pune.

During the solar eclipse, the apparent size of the Moon is smaller than that of the Sun by 1 per cent, the expert said.

Allying rumours that the eclipse will mark the end of coronavirus, Aniket Sule, Chairperson, Public Outreach and Education Committee of the Astronomical Society of India, said: "Solar eclipse is caused when the Moon comes in front of the Sun for a short time. As seen from Earth eclipses occur somewhere in the Earth 2 to 5 times a year. Eclipses do not impact microorganisms on Earth. Likewise there no danger in eating of stepping out during an eclipse. No mysterious rays come out of the Sun during an eclipse."

New Delhi, Jun 29: Fuel prices rose on Monday again after a days pause with oil marketing companies increasing the pump price of petrol by 5 paisa and diesel by 13 paisa per litre in Delhi.

In the national capital, petrol price on Monday stood at Rs 80.43 per litre while that of diesel at Rs 80.53 a litre.

With this increase, fuel prices have moved up on 22 of the last 23 days (with no rise on Sunday). Petrol prices, however, were unchanged for an additional day in between after the daily revision based on dynamic pricing was reinstated by OMCs.

Since the daily price revision resumed on June 7, petrol price has increased Rs 9.17 and diesel rose by Rs 11.14 in the national capital. In the other cities the magnitude of increase was similar.

During the past 23 days, the quantum of price hike gradually declined from around 60 paise raise for a few days, immediately post the resumption of daily price revision, to less than 20 paise during the past few days and now even less than 10 paisa per litre.

In a historic development, the price of diesel surged above that of petrol in the national capital during this period. It continues to remain higher even though on Saturday the quantum of petrol price hike was higher than that of diesel.

Officials in oil marketing companies said that it is hard to predict which of the two fuels will be priced higher in the Capital as the gap between the two is almost negligible. But petrol prices have shown more volatility in international markets that may take it ahead once again in coming days.

Apart from Delhi, the retail prices of petrol and diesel have followed the traditional path in other metros with petrol being priced at a premium of between Rs 5 and 8 per litre. The difference between the auto fuel prices in Delhi and other metros is because of the taxation structure.

While both petrol and diesel are at similar levels of taxes (state and centre) in Delhi, it is higher for petrol in many other Indian cities.

Globally diesel is priced a tad higher than petrol. In India too, the base price of diesel is slightly higher than petrol but taxation at central and state levels changed the complexion of retail prices.

If the price of petroleum products and crude hold their positions in global markets, then petrol and diesel prices rise may stop for a longer period and we may even see marginal fall in prices.

Fuel prices have been increasing since June 7 when oil companies began the daily price revision mechanism after a hiatus of 82 days during the lockdown.