- Who is father of astronomy?
- Which color star is hottest?
- What galaxy do we live in?
- What exactly is a black hole?
- Are stars still being born?
- What type of astronomers are there?
- How do astronomers study stars?
- What are the 2 types of astronomy?
- Which color star is the coolest?
- What is the biggest star in the universe?
- How can I learn astronomy on my own?
- What is it called to study stars?
- What is studied in astronomy?
- How many galaxies are there?
- What are the 4 types of galaxies?
- What is a star NASA?
- What happens to stars when they die?
- What are the 7 types of stars?
- Why do we need to study astronomy?
- Who was the first astronomer?
- What are the branches of astronomy?
Who is father of astronomy?
Nicolaus CopernicusOn February 19, 1473, Nicolaus Copernicus is born in Torun, a city in north-central Poland on the Vistula River.
The father of modern astronomy, he was the first modern European scientist to propose that Earth and other planets revolve around the sun..
Which color star is hottest?
blueThe color of a star is linked to its surface temperature. The hotter the star, the shorter the wavelength of light it will emit. The hottest ones are blue or blue-white, which are shorter wavelengths of light. Cooler ones are red or red-brown, which are longer wavelengths.
What galaxy do we live in?
Milky Way GalaxyAll the stars we see in the night sky are in our own Milky Way Galaxy. Our galaxy is called the Milky Way because it appears as a milky band of light in the sky when you see it in a really dark area.
What exactly is a black hole?
A black hole is an area of space with a gravitational field so strong that nothing, not even light, can escape it. That’s why black holes appear black. In some cases, black holes are former massive stars that have been crushed to an extreme density during supernova explosions.
Are stars still being born?
There was an era of rapid star formation, early in the history of our universe, 10 billion years ago. The first stars – and, in fact, since most stars are very long-lived – most stars still around today were born then.
What type of astronomers are there?
Astronomers usually specialize in one or more of the major sub-fields of astronomy; typical job titles include planetary astronomers, stellar astronomers, solar astronomers, galactic and extragalactic astronomers and cosmologists who study the origins and evolution of the universe.
How do astronomers study stars?
“You take the light from a star, planet or galaxy and pass it through a spectroscope, which is a bit like a prism letting you split the light into its component colours. “It lets you see the chemicals being absorbed or emitted by the light source. From this you can work out all sorts of things,” says Watson.
What are the 2 types of astronomy?
Since the 20th century there have been two main types of astronomy, observational and theoretical astronomy. Observational astronomy uses telescopes and cameras to observe or look at stars, galaxies and other astronomical objects.
Which color star is the coolest?
Red starsYou can tell the temperature of the star. Red stars are the coolest. Yellow stars are hotter than red stars. White stars are hotter than red and yellow.
What is the biggest star in the universe?
The largest known star in the universe is UY Scuti, a hypergiant with a radius around 1,700 times larger than the sun.
How can I learn astronomy on my own?
Learn the Night Sky with the Unaided Eye. Astronomy is an outdoor nature hobby, so the best way to begin is to go out into the night and learn the starry names and patterns overhead. … Thinking Telescope? … Dive into Maps and Guidebooks. … Seek Out Other Amateurs. … When It’s Time for a Telescope, Plunge in Deep.
What is it called to study stars?
Astronomy is the study of everything in the universe beyond Earth’s atmosphere. That includes objects we can see with our naked eyes, like the Sun , the Moon , the planets, and the stars . It also includes objects we can only see with telescopes or other instruments, like faraway galaxies and tiny particles.
What is studied in astronomy?
Astronomy is the branch of science that studies the universe, the stars and the planets. Astronomy combines aspects of maths and physics to study how the universe was formed and the celestial bodies that are contained within it.
How many galaxies are there?
200 billion galaxiesThis led to an estimate that the observable universe contained about 200 billion galaxies.
What are the 4 types of galaxies?
In 1936, Hubble debuted a way to classify galaxies, grouping them into four main types: spiral galaxies, lenticular galaxies, elliptical galaxies, and irregular galaxies. More than two-thirds of all observed galaxies are spiral galaxies.
What is a star NASA?
A star is a sphere of gas held together by its own gravity. This phase of the star’s life is called the main sequence. … Before a star reaches the main sequence, the star is contracting and its core is not yet hot or dense enough to begin nuclear reactions.
What happens to stars when they die?
Most stars take millions of years to die. When a star like the Sun has burned all of its hydrogen fuel, it expands to become a red giant. After puffing off its outer layers, the star collapses to form a very dense white dwarf. …
What are the 7 types of stars?
There are seven main types of stars. In order of decreasing temperature, O, B, A, F, G, K, and M. This is known as the Morgan–Keenan (MK) system. The majority of all stars in our galaxy and even the Universe are main-sequence stars.
Why do we need to study astronomy?
Astronomy is a close-knit field where you will get the opportunity to work with many people. Professional astronomers are motivated by curiosity and a deep desire to understand some of the grandest and most beautiful phenomena in the universe, as well as a desire to share these wonders with others.
Who was the first astronomer?
Galileo GalileiGalileo Galilei was among the first to use a telescope to observe the sky, and after constructing a 20x refractor telescope. He discovered the four largest moons of Jupiter in 1610, which are now collectively known as the Galilean moons, in his honor.
What are the branches of astronomy?
Branches of astronomyAstrobiology – studies the advent and evolution of biological systems in the universe.Astrophysics – branch of astronomy that deals with the physics of the universe, including the physical properties of celestial objects, as well as their interactions and behavior.More items…