describe constellation

describe constellation插图

Groups of stars
Constellations aregroups of stars. The constellations you can see at night depend on your location on Earth and the time of year. Constellations were named after objects,animals,and people long ago. Astronomers today still use constellations to name stars and meteor showers.

What do astronomers mean by a constellation?

When astronomers refer to a constellation, they’re talking about a group of stars that together to form a recognizable pattern. Many of these patterns are related to mythology, however some of them are not, and are just named after particular objects. There are 88 official constellations up there in the night sky, and all of them resemble a different shape, pattern, object or even a person. Not all of them actually look like their respective constellation, although you’ll probably be …

What are some facts about constellations?

The best time to view Aquarius is October,Aquila is at its vivid best in September,Aries should be explored in December,Canis Major is easy to spot in February …The word constellation comes from a Latin meaning set with stars.There are 13 Zodiac constellations,which you should all be familiar with,but there are only 12 zodiac signs. …More items…

What are the 5 major constellations?

These are:Crux – recognizable for the Southern Cross asterism,featured on a number of flags in the southern hemisphereCentaurus – home to first-magnitude stars Alpha and Beta Centauri and many other bright starsCarina – home to Canopus,the second brightest star in the sky,and to the Diamond Cross asterism

What is the most beautiful constellation?

Which is the most beautiful constellation?Constellation Family Name: Orion.Main Stars: 7.Stars with Planets: 10.Brightest Star: Rigel.Nearest Star: Ross GJ 3379.Messier Objects: 3.Best Visibility: January,9 p.m. What does 3 stars in the sky mean? …

Which Greek poet wrote the constellations?

The earliest Greek work that purported to treat the constellations as constellations, of which there is certain knowledge, is the Phainomena of Eudoxus of Cnidus (c. 395–337 bce ). The original is lost, but a versification by Aratus (c. 315–245 bce ), a poet at the court of Antigonus II Gonatas, king of Macedonia, is extant, as is a commentary by Hipparchus (mid-2nd century bce ).

Why are constellations important?

Constellations are useful in assisting astronomers and navigators to locate certain stars. Southern sky. From the earliest times the star groups known as constellations, the smaller groups (parts of constellations) known as asterisms, and also individual stars have received names connoting some meteorological phenomena or symbolizing religious …

How many constellations are there in the world?

The majority of the remaining 40 constellations that are now accepted were added by European astronomers in the 17th and 18th centuries. In the 20th century the delineation of precise boundaries for all the 88 constellations was undertaken by a committee of the International Astronomical Union. By 1930 it was possible to assign any star to a constellation.

What is the purpose of constellations?

Constellations are useful in assisting astronomers and navigators to locate certain stars.

What is an encyclopedia editor?

Encyclopaedia Britannica’s editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree.

Which constellations were believed to have the appearance of a llama?

The constellation of Lyra, which was believed to have the appearance of a llama, was entreated for protection. The constellation Scorpio was believed to have the shape of a cat; the Pleiades were called “little mothers,” and festivals were celebrated on their reappearance in the sky.…

When was it possible to assign any star to a constellation?

By 1930 it was possible to assign any star to a constellation. The Editors of Encyclopaedia Britannica This article was most recently revised and updated by Erik Gregersen, Senior Editor.

What constellation is the Big Bear?

The Ursa Major and the Ursa Minor. These constellations are located in the Northern Hemisphere and rotate in the sky throughout the seasons. The Ursa Major is otherwise known and the “Big Bear” and the Ursa Minor as the “Little Bear”. Ancient myths tell a story of the Greek God Zeus was becoming jealous of a woman and her son.

What is the name of the star that is made up of seven bright stars?

The Ursa Major is well known due to its asterism made up of seven bright stars. This asterism has several names given to it by different parts of the world but is most commonly known as the big dipper or the plough. It visually looks like a large ladle with a long handle.

How many months does the Sun spend in each constellation?

As the Sun travels through the sky, it spends roughly one month in each constellation per year. A person’s star sign is represented by which segment of the sky the Sun was in when they were born. For example, if you were born between May the 21st and June the 20th, the Sun would have been in the Gemini segment of the sky, and therefore you would be “a Gemini”. It is important to note that unlike astronomy, astrology is not scientifically based.

Why do we call the constellations asterisms?

The name is usually given based on the shape made by the brightest stars within the constellation. Some of these shapes appear much more obvious than others. Sometimes there is a smaller shape distinguishable within the constellation that is also given a name, this is known as an asterism. People have gazed up at the stars for many thousands …

What is a constellation?

A constellation is a name given to a group of stars in the sky that make up a certain pattern. Sometimes this pattern is imaginary. When the sky is clear these stars can be seen from Earth without the use of a telescope.

How many constellations are there in the zodiac?

These are the groups of constellations that the Planets, the Moon and the Sun pass through as they travel through the solar system. There are twelve in total, and they are known as the signs of the Zodiac.

Why did people use the stars before the compass?

Before the compass was invented, people used the stars to navigate, mainly when sailing across the ocean. They used a constellation called the Ursa Minor to identify the location of Polaris, also known as the North Star. This allowed them to calculate their latitude and work out which direction they were travelling in.

What is the name of the constellation that represents Ganymede?

While one of the biggest, most famous, and oldest named constellations, Aquarius is faint and often hard to find/see. In Greek mythology, Aquarius represented Ganymede, a very handsome young man. Zeus recognized the lad’s good looks, and invited Ganymede to Mt. Olympus to be the cupbearer of the gods. For his service he was granted eternal youth, as well as a place in the night sky.

Why did Zeus become a swan?

Multiple personas take on the form of the swan in Greek mythology. At one point Zeus morphed into a swan to seduce Leda, mother of both Gemini and Helen of Troy. Another tale says that Orpheus was murdered and then placed into the sky as a swan next to his lyre (the constellation Lyra, also in the drawing above).

How many months are the constellations visible?

While below I note a “best viewed” month for each constellation, many are visible for at least 6 months of the year – just not quite as vividly. The constellations below are the most famous and most visible to the naked eye in the Northern Hemisphere.

How many constellations are there in the world?

The International Astronomical Union lists 88 constellations — a list that has been in use since 1922 and encompasses all the night sky around the world. I chose the 15 below based on a combination of size, visibility, importance of stars within them, ease of recognition, and place in folklore through history.

How many constellations are there in the Urania’s Mirror?

Published in 1824, the set contains 32 star chart cards depicting 79 constellations, many of which are no longer recognized or are considered sub-constellations. The illustrations are based on what’s viewable from Great Britain, making them fairly similar to what you’d see in the States.

What did the ancient forbearers know about the night sky?

My ancient forbearers knew the night sky like the back of their hand. The constellations oriented them in a literal sense – as vital navigation tools – but in a spiritual one as well, serving as vivid reminders of their mythologies and place in the universe. Still today, knowing the constellations can be a source of both satisfying knowledge and humbling awe.

What do you need to see the stars?

Other than a star map, all you need is a dark sky (as far away from cities as possible), and for extra visual aide, a pair of binoculars or a telescope. With the naked eye, you’ll see basic outlines, but with binoculars or a telescope you’ll see fainter stars and other features like nebulae and star clusters. When you’re out observing, you’ll want to generally orient yourself towards the North Star (directions on how to find the North Star are found at the bottom of the article).

How many constellations can you see from a single location?

Observers can never see all 88 constellations from a single location on Earth. While some of the southern constellations can be seen from northern latitudes at certain times of year – Scorpius, for instance, is visible over the southern horizon in the summer – others never rise over the horizon. Crux, also known as the Southern Cross, which is prominent enough in the southern sky to be featured on several national flags in the southern hemisphere, can never be seen from most locations north of the equator. Similarly, the constellation Ursa Minor, which contains Polaris, the closest bright star to the north celestial pole, cannot be seen from most places south of the equator.

Why do we see different constellations at different times of the year?

As the Earth orbits around the Sun, constellations move slowly to the west over the course of a year and we see different parts of the sky at night because, as the seasons change, we are looking in a different direction in space. This means that different constellations are viewable at different times of year.

Which constellation is closest to the north pole?

Similarly, the constellation Ursa Minor, which contains Polaris, the closest bright star to the north celestial pole, cannot be seen from most places south of the equator. The position of all stars and deep sky objects on the celestial sphere is mapped relative to the celestial equator and poles, just as different locations on Earth are mapped …

What is the northern hemisphere?

Northern hemisphere map, image: Roberto Mura. The celestial sphere, an imaginary sphere surrounding Earth, is divided into the northern and southern hemispheres by the line of the Earth’s equator, extended into space.

How many constellations are there in the sky?

Out of the 88 constellations recognized by the International Astronomical Union (IAU), 36 are found predominantly in the northern sky, while the remaining 52 are located in the southern sky.

Where are circumpolar stars located?

Near the equator, there are no circumpolar stars. With the celestial poles on the horizon, all stars appear to rise in the east and set in the west for observers at the equator. Observers can never see all 88 constellations from a single location on Earth.

Do stars move farther from the celestial poles?

Polaris and other stars lying near the celestial poles appear to move across a smaller area than stars lying closer to the equator. The farther they are from the poles, the wider the circle the stars make across the night sky. The stars that are close to the poles never set below the horizon for observers in locations where the stars are visible: they are circumpolar. Near the equator, there are no circumpolar stars. With the celestial poles on the horizon, all stars appear to rise in the east and set in the west for observers at the equator.

Why do constellations change seasons?

The constellations that are visible in the night sky in the evening change from season to season because stars appear to move by 90 degrees across the sky every three months. Even though some constellations are circumpolar to northern or southern latitudes and can be seen year round, the sky offers different sights from different locations at different times of year.

Why are different constellations visible in different areas of the sky?

As the seasons pass, different constellations of stars are visible in different areas of the sky because the stars move by about 90 degrees from one season to the next. The term “seasonal constellations” usually refers to the constellations that are visible in the sky at around 9 pm in the evening or to constellations that are best observed …

What constellations can be seen in the sky in the evening?

These, however, are not the only constellations that can be seen in the sky on any given evening. For instance, Andromeda , a prominent autumn constellation, can be seen high overhead on summer evenings around midnight. Orion, which dominates the winter sky in the evening, can also be seen in the late summer, when it rises just before dawn.

What time of day are the constellations visible?

The term “seasonal constellations” usually refers to the constellations that are visible in the sky at around 9 pm in the evening or to constellations that are best observed during a particular season. These, however, are not the only constellations that can be seen in the sky on any given evening. For instance, Andromeda, a prominent autumn …

How many degrees do stars move?

As the seasons pass, different constellations of stars are visible in different areas of the sky because the stars move by about 90 degrees …

What is the best time to observe constellations?

The table below shows the best months to observe the constellations in the evening (9 pm) and the latitudes (northern and south ern) between which they are visible. Constellation. Month. Northern latitude.

How long does it take for a star to move in a winter constellation?

Summer and winter constellations are different because stars in fact take a little less than an hour to move by 15 degrees, and they complete an entire circle in 23 hours and 56 minutes. In other words, they rise and set four minutes earlier each night. The distance they cross in those remaining 4 minutes is a little less than 1 degree, …

Did you know?

In ancient Aramea, the offspring of the “sons of God” – the Nephilim – were said to be Orion’s descendants.

What are the stars in Orion?

The constellation of Orion hosts numerous bright stars, such as Rigel, Betelgeuse, Bellatrix, Mintaka, Alnilam, Alnitak, Saiph and Meissa. Many famous nebulae are present in Orion, apart from the Messier objects, they are the Horsehead Nebula, Barnard’s Loop, Flame Nebula, NGC 2023, and the Monkey Head Nebula.

How far away is the Orion Nebula?

The Orion Nebula is among the brightest ones in the sky and can be seen without binoculars. It has a visual magnitude of 4.0, being 1,344 light-years away from Earth.

Why is Orion never in the sky?

The angry goddess tried to dispatch Orion with a scorpion – this is given as the reason for why the constellations of Orion and Scorpius are never in the sky at the same time. The scorpion managed to bite Orion but Ophiuchus, the Serpent Bearer, revived Orion with an antidote.

What is the magnitude of Betelgeuse?

Betelgeuse occasionally outshines even Rigel, as it is also a variable star with an apparent magnitude varying from +0.0 to +1.13. There are three Messier objects located in the constellation of Orion. They are the Messier 42 and Messier 43 nebula, and the reflection nebula Messier 78.

How many Messier objects are there in the constellation of Orion?

In the constellation of Orion, there are only three Messier objects, they are Messier 42 and Messier 43, which are nebulas, and the reflection nebula Messier 78.

What is the deep sky object in Orion?

A famous deep-sky object in Orion is the Orion Molecular Cloud Complex, which is comprised of a large group of dark clouds, bright emission and reflection nebulae, H II regions, and young stars.

What constellation is in the center of the Milky Way?

The constellation is in the center of the Milky Way. It is best seen during summer. 1. Orion. Orion is one of the prominent constellations in the sky. It is on the celestial equator and can be seen throughout the world. Orion is a prominent and identifiable constellation in the night sky.

What constellation is Ursa Major?

Ursa Major’s most visible pattern is a group of seven averagely bright stars mimicking the shape of a Lesser Bear.

How many constellations are there in the sky?

The sky is divided into 88 constellations based on asterisms depicting 42 animals, 29 inanimate objects, and 17 mythological creatures. Some of the common constellations include; 5. Phoenix. Phoenix is a minor constellation named after mythical phoenix, the bird reborn from the ashes.

How many square degrees is the constellation Orion?

It was named after Orion who was a hunter according to the Greek mythology. The constellation covers 594 square degrees ranking 26th of the entire constellations by size. It is mostly visible in the evening sky between January and March.

What is the brightest star in the constellation of Pegasus?

It is the 7th largest of the 88 recognized constellations. The brightest star within the constellation of Pegasus, Epsilon Pegasi, is estimated to have a mass that is 12 times that of the sun! 3. Ursa Major.

Where is the constellation Ophiuchus?

Ophiuchus constellation is located around celestial equator. Its name is derived from Greek word “Ophioukhos” which translates to “Serpent-bearer.”. The constellation is represented as a man grasping a serpent. Ophiuchus was part of the 48 constellations listed by Ptolemy and was formerly referred to as Serpentarius.

Where is Ursa Major?

Ursa Major. Ursa Major constellation is in the northern celestial hemisphere and part of the 2nd century constellations listed by Ptolemy. Ursa Major can be seen all year round in most parts of the northern hemisphere.