As the song says, various stars adorn the sky at night. For those who live in an urban environment with all the pollution and noise, the star-studded sky is a sight that is rarely seen. Of course, there are times when the stars become more visible.
All this time, you may have been thinking, “Why does the star look like that?” The appearance of a star that resembles a small dot confuses you with its shape. Because of that, you even “hit flat” all the stars!
1. Maybe you are not “sensitive” to stars
With the Earth’s 365-day revolution and countless stars, logically the view of the sky should be different, right? Well, the first thing you have to keep in mind is “no stars are the same”.
If you think the stars look the same, chances are you’re actually seeing a hanging star mood or only 1-2 minutes, not as thorough as astronomers and other scientists. If you actively look at the night sky last night for only 6 months, you will see that the stars are present in various forms.
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2. Using the star map
star map or sky map to see constellations and stars (thoughtco.com)–
Launching Astronomy Info, because the Earth rotates from West to East, the stars in the sky look like the Sun, which rises from the East and sets in the West. It takes 12 hours to complete this process and the star usually moves 15 degrees per hour from east to west across the horizon.
You can use the star map online or via the app to find constellations and their brightest stars after sunset. For example, on July 7, 2021, at 8 p.m., there was a constellation Aquila in the eastern sky of Jakarta. There, you can see the sparkling stars Altair.
Find Altair with a telescope in the sky and note its location. Then, the next day, at 5 am local time, try looking for Altair and its constellations in the sky again, and you will find them in the western sky due to the effect of Earth’s rotation!
Also Read: 5 Largest Galaxies Known, So Feel Small!
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3. Synodic and sidereal Earth days cause changes in the time of sunrise and sunset of stars
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illustration of Earth’s rotation (earth-chronicles.com)–
Because the stars are constantly rising and setting in the sky, the stars look different throughout the night. While the position of the stars is usually fixed, the times of sunrise and sunset can vary. This is due to the duration of Earth’s rotation.
Observe the stars in the sky, and you will ngeh if stars usually rise and set 4 minutes earlier per day. The duration of Earth’s rotation is also different: some are 23 hours, 56 minutes, 4.0905 seconds for one rotation or “sidereal day” and some are 24 hours or “synodic day”.
Therefore, if a star rises at 8 p.m. one day, it will rise at 7.56 p.m. the next day. The calculation is constant throughout the year.
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4. The time difference between the appearance and disappearance of stars due to the revolution of the Earth
illustration of the Earth around the Sun (rd.com)–
In addition to rotation, changes in the appearance of stars and constellations in the sky are also caused by the movement of the Earth around the Sun or the revolution of the Earth. The method is the same, namely by using a star map and telescope.
For example, Astronomy Info assumes the constellations Aquila with his star Altair on 7 July 2021 at 8 pm in Jakarta. In the next 6 months or January 7, 2022 at the same time, the constellations will change into Canis Minor with stars Procyon, the 8th brightest star in the sky!
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Conclusion: There are no identical stars in the sky. Take a closer look, yes!
star gazing illustration (unsplash.com/Joshua Earle)–
The idea that “all stars look the same in the sky” means that you rarely or only see the night sky for a short time. In fact, if you look at it longer and with sufficient preparation, you will find that the stars in the sky are changing!
With a star map and telescope, you can see the rising and setting of stars. In fact, because of the rotation and revolution of the Earth, the stars are more varied in motion and type. So you want to admire the stars longer, huh!
Also read: 10 Strangest Moons in the Solar System, Something Similar to Earth!
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