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Autumn Star shines in the sky of Saudi Arabia and the Arab world

Starting on Saturday and lasting several nights

The head of the Astronomical Society in Jeddah, Eng. Majed Abu Zahra, stated that he will monitor the sky of Saudi Arabia and the Arab world on Saturday, September 10, 2021, and for several nights to come, the star of the mouth of the whale known as the “Autumn Star”, which is seen with the naked eye, and this year it will be Jupiter and Saturn near it on the dome of the sky.

And “Whale’s Mouth” is a bluish-white star of the second magnitude, which is twice as large as the sun and 20 times brighter, 25 light-years away from Earth.

This star is called by other names such as “the lone star” because it is the brightest star that appears in an empty part of the sky, and it is also called “the lone star” or “the lone star”.

In the first nights of autumn, the whale’s mouth star is observed after 7 pm local time, as it appears above the southeast horizon, and there is no other bright star that is very low on the southeast horizon at this time of the year.

With the passage of hours, the mouth of the whale reaches the highest point above the southern horizon at approximately 11 pm, and then sets on the southwestern horizon at approximately 4 am local time, and the reason for this apparent movement of this star and the rest of the stars in the dome of the sky is the rotation of the earth around its axis.

In addition to the whale’s mouth being one of the brightest stars in the night sky, this star is very important as it was discovered years ago that it has a planetary disk, and this ring of dust that surrounds (the whale’s mouth) may form planets one day.

In 2008, he announced the discovery of what is believed to be a planet named (Whale’s Mouth – B), as the first planet outside our solar system to be discovered directly in visible light. However, subsequent observations of that supposed planet raised questions about it, unlike other exoplanets, it is bright in Visible light and undetected in infrared.

The extra brightness was assumed to be caused by a massive layer or ring of dust encircling the object that might be associated with collisions, and Hubble observations showed that the object might not follow an elliptical orbit, as planets usually do.

And since 2014, the Hubble telescope images showed the mysterious disappearance of the “whale mouth – b”, and previous images showed that the body is constantly fading over time, and this does not happen with a real planet.

A study published in April 2020, after analyzing all available archival Hubble telescope data on the whale mouth b, including the most recent images taken by the Hubble telescope, revealed several characteristics that together paint a picture of a body the size of a planet that might not have existed in the first place. The first, but a slowly expanding cloud of dust, spread out into space as a result of a collision between two comet-like bodies that occurred very shortly before the first observations of Whale Mouth-B.

It is worth noting that the current period and the next month will be good to see this star and be at its best at midnight.

The attached photo:
Simulation of the whale’s mouth star towards the southern horizon at 10 pm local time, and in the frame an image taken by the Hubble Space Telescope showing the presence of a planetary disk around that star.

Astronomical Society President of the Astronomical Society

Jeddah astronomer: “Autumn Star” shines in the sky of Saudi Arabia and the Arab world

Sabq electronic newspaper
previously
2021-09-10

The head of the Astronomical Society in Jeddah, Eng. Majed Abu Zahra, stated that he will monitor the sky of Saudi Arabia and the Arab world on Saturday, September 10, 2021, and for several nights to come, the star of the mouth of the whale known as the “Autumn Star”, which is seen with the naked eye, and this year it will be Jupiter and Saturn near it on the dome of the sky.

And “Whale’s Mouth” is a bluish-white star of the second magnitude, which is twice as large as the sun and 20 times brighter, 25 light-years away from Earth.

This star is called by other names such as “the lone star” because it is the brightest star that appears in an empty part of the sky, and it is also called “the lone star” or “the lone star”.

In the first nights of autumn, the whale’s mouth star is observed after 7 pm local time, as it appears above the southeast horizon, and there is no other bright star that is very low on the southeast horizon at this time of the year.

With the passage of hours, the mouth of the whale reaches the highest point above the southern horizon at approximately 11 pm, and then sets on the southwestern horizon at approximately 4 am local time, and the reason for this apparent movement of this star and the rest of the stars in the dome of the sky is the rotation of the earth around its axis.

In addition to the whale’s mouth being one of the brightest stars in the night sky, this star is very important as it was discovered years ago that it has a planetary disk, and this ring of dust that surrounds (the whale’s mouth) may form planets one day.

In 2008, he announced the discovery of what is believed to be a planet named (Whale’s Mouth – B), as the first planet outside our solar system to be discovered directly in visible light. However, subsequent observations of that supposed planet raised questions about it, unlike other exoplanets, it is bright in Visible light and undetected in infrared.

The extra brightness was assumed to be caused by a massive layer or ring of dust encircling the object that might be associated with collisions, and Hubble observations showed that the object might not follow an elliptical orbit, as planets usually do.

And since 2014, the Hubble telescope images showed the mysterious disappearance of the “whale mouth – b”, and previous images showed that the body is constantly fading over time, and this does not happen with a real planet.

A study published in April 2020, after analyzing all available archival Hubble telescope data on the whale mouth b, including the most recent images taken by the Hubble telescope, revealed several characteristics that together paint a picture of a body the size of a planet that might not have existed in the first place. The first, but a slowly expanding cloud of dust, spread out into space as a result of a collision between two comet-like bodies that occurred very shortly before the first observations of Whale Mouth-B.

It is worth noting that the current period and the next month will be good to see this star and be at its best at midnight.