The rarest astronomical phenomena in the world

The galaxy is an infinite and vast expanse of space that holds countless secrets. For thousands of years, humans have discovered and witnessed countless amazing astronomical phenomena occurring on this Earth. In it, there are extremely rare phenomena that perhaps in a person's life can only be encountered once.

Top 10 rarest astronomical phenomena

1. Comet Halley

Considered the most common comet known in the Solar System, Halley's comet is named after astronomer Edmond Halley, who calculated that the star would pass by Earth every 75-76 five.

The last appearance of Halley's comet was in 1986, and the next one is predicted to be in 2061. According to Space, "when Halley passes the Earth in 2061, the comet will be on the same side of the Earth and will have much brighter colors than in 1986".

2. Comet Hale-Bopp

Dubbed the Great Comet appearing in 1997, comet Alan Hale was discovered by Thomas Bopp and his laboratory in 1995. It is known that this is one of the most viewed comets in history when shines in the sky for 18 months and is visible to the naked eye from Earth.

In fact, NASA maintains an online database of more than 5000 images of the phenomenon. According to NASA, Comet Hale-Boop is believed to be 1000 times brighter than Comet Halley at the time of its discovery.

Calculating the comet's orbit, astronomers say it last passed by Earth 4,200 years ago, and predicts the next return is in at least another 4,385 years.

3. Blue Moon

As you probably already know, this phenomenon has nothing to do with the moon magically turning blue. Instead, the name refers to the third full moon in a season with four full moons. According to this calculation, the full moons are about 29.5 days apart, so months of 30 or 31 days can have two full moons.

According to NASA, there is a blue moon every 2.5 years. The last time, the blue moon appeared was in August 2021. So the next blue moon is likely to fall in 2023.

4. Total solar eclipse

The concept of "total eclipse" is probably not too strange to us. This is not a rare phenomenon at the global level, but this phenomenon occurs every 18 months in a specific location only. And for this phenomenon to return to one location could take centuries.

With this, Belgian meteorologist and astrologer Cassini calculated that a total solar eclipse, at any given time on Earth, can only happen again every 375 years.

5. Storm on Saturn

The Great White Spot, also known as the Great White Oval, are periodic storms so large that they can be seen from Earth through a telescope because of their characteristic white appearance.

Usually these storms will appear with a cycle of 20-30 years and often cover an area of ​​hundreds or thousands of kilometers. So far, only six storms have been observed by astronomers in Saturn's atmosphere since 1876. The last time this happened was in 2010.

6. The phenomenon of Venus moving through the Sun's disk

The Transit of Venus is an astronomical phenomenon that occurs when Venus passes between the Earth and the Sun. During this time, people on Earth will see a black dot in the Sun's disk. According to scientists, this event usually occurs every 8 years, and the position of Venus on the Sun's disk is constantly changing. In addition, it takes about 110 years for the old position to be repeated once. The last time this happened was in 2012.

7. Planets Line Up

Astronomers think that the phenomenon of planets in the solar system aligning is extremely rare. It is estimated that there will be the phenomenon of Mars, Metal, Water, Wood, Earth and the Moon appearing in alignment in the next 2040.

Previously, scientists have recorded the alignment of Mars, Earth, Metal, Mercury, and Jupiter in 2000. Meanwhile, in May 2011, astronomers also recorded moment when 3 stars Jupiter, Mercury and Kim align.

8. Comet ISON

ISON is a comet orbiting very close to the Sun discovered by two Russian astronomers - Vitali Nevski and Artyom Novichonok on September 21, 2012. However, on November 28, 2013, it was completely disbanded.

According to astronomers, when exposed to the Sun at a distance of more than a million kilometers, the material contained on this comet begins to heat, evaporate, and then break down into small pieces and release. dust in streaks in space.

9. Leonid meteor shower

The Leonid meteor shower occurs as Earth passes through the orbit of Comet Tempel-Tuttle. This beautiful astronomical event was discovered in 1833 and lasted for more than 15 minutes. During this event, people on Earth can see about 1,000 shooting stars per hour appearing in the sky.

Even astronomers think that comet Tempel-Tuttle can produce about 100,000 meteors per hour.

10. Comet Churyumov- Gerasimenko

Comet Churyumov- Gerasimenko Comet orbits the Sun every 6 years. It is known that this comet originated from an object next to Neptune and its closest orbit is about 3.5 astronomical units from Earth. Comet Churyumov-Gerasimenko was first discovered in 1969.