- How long does a star live for?
- Why do stars twinkle?
- How long does it take for a star to explode?
- Can a planetary nebula form a star?
- What is a dying star called?
- Can you live in a nebula?
- What does a nebula look like to the human eye?
- What are the 5 stages of a star?
- What is the difference between a star and a nebula?
- How long does a nebula stage last?
- At what point is a star born?
- Is Earth inside a nebula?
- What determines if a star will explode into a supernova?
- What is a white star?
- How does a star form from a nebula?
- How long does it take for a nebula to form a star?
- Is a star born when a nebula expands?
- What is it like inside a nebula?
How long does a star live for?
about 10 billion yearsThe life of a star is determined by how large it is.
Stars live different lengths of time, depending on how big they are.
A star like our sun lives for about 10 billion years, while a star which weighs 20 times as much lives only 10 million years, about a thousandth as long..
Why do stars twinkle?
The movement of air (sometimes called turbulence) in the atmosphere of Earth causes the starlight to get slightly bent as it travels from the distant star through the atmosphere down to us on the ground. … To our eyes, this makes the star seem to twinkle.
How long does it take for a star to explode?
On average, a supernova will occur about once every 50 years in a galaxy the size of the Milky Way. Put another way, a star explodes every second or so somewhere in the universe, and some of those aren’t too far from Earth.
Can a planetary nebula form a star?
Progenitor stars that form planetary nebulae will spend most of their lifetimes converting their hydrogen into helium in the star’s core by nuclear fusion at about 15 million K. … Such higher core temperatures then make the star’s cooler outer layers expand to create much larger red giant stars.
What is a dying star called?
Some types of stars expire with titanic explosions, called supernovae. When a star like the Sun dies, it casts its outer layers into space, leaving its hot, dense core to cool over the eons.
Can you live in a nebula?
Possibly, but probably not. It is not known when life formed on Earth, but Earth was once part of a nebula, and it now has life. … Solar nebulae like the one that formed our solar system are essentially cleared by the gravity of the sun and planets within 10–100 million years.
What does a nebula look like to the human eye?
In the telescope, it is a green-to-gray cloudy patch. It’s just too dim for you to see in color. There’s not enough energy to excite the cells in your retina that are responsible for color vision. If your eyes were sensitive enough, you’d see it in shades of purple and red.
What are the 5 stages of a star?
7 Main Stages of a StarA Giant Gas Cloud. A star begins life as a large cloud of gas. … A Protostar Is a Baby Star. … The T-Tauri Phase. … Main Sequence Stars. … Expansion into Red Giant. … Fusion of Heavier Elements. … Supernovae and Planetary Nebulae.
What is the difference between a star and a nebula?
As nouns the difference between star and nebula is that star is any small luminous dot appearing in the cloudless portion of the night sky, especially with a fixed location relative to other such dots while nebula is (astronomy) a cloud in outer space consisting of gas or dust (eg a cloud formed after a star explodes).
How long does a nebula stage last?
From far away, the former layers of the star appear as a glowing planetary nebula, about 1000 times the size of our solar system. The fluorescent light of planetary nebulae lasts for about 10,000 years. Eventually, the core stops ejecting gas into space.
At what point is a star born?
At what point is a star born? When the core of a protostar has reached about 10 million K, pressure within is so great that nuclear fusion of hydrogen begins, and a star is born. What causes a star to die? We do know that all stars, regardless of their size, eventually run out of fuel and collapse due to gravity.
Is Earth inside a nebula?
The planet Earth is not part of any particularly named Nebula . Earth is part of the Solar System which is part of our home galaxy, the so-called “Milky Way”, which is part of the so-called Local Group , a collection of more than 50 other galaxies in the “neighborhood” of our own galaxy.
What determines if a star will explode into a supernova?
Having too much matter causes the star to explode, resulting in a supernova. … As the star runs out of nuclear fuel, some of its mass flows into its core. Eventually, the core is so heavy that it cannot withstand its own gravitational force. The core collapses, which results in the giant explosion of a supernova.
What is a white star?
1 : a star of spectral type A or F having a moderate surface temperature and a white or yellowish color. 2a : an annual morning glory (Ipomoea lacunosa) of the southern U.S. with star-shaped leaves and small white or purplish flowers.
How does a star form from a nebula?
Star Forming Nebula Stars are born in clouds of gas and dust. … These knots contain sufficient mass that the gas and dust can begin to collapse from gravitational attraction. As it collapses, pressure from gravity causes the material at the center to heat up, creating a protostar.
How long does it take for a nebula to form a star?
The time it takes for a nebula to collapse into a star and start the nuclear burning of its hydrogen into helium depends on the size of the star. For a star the size of the sun, it takes about 10,000,000 years to collapse. For bigger stars, it is a shorter time – as low as 100,000 years for the biggest stars.
Is a star born when a nebula expands?
A star’s mass is determined by the amount of matter that is available in its nebula, the giant cloud of gas and dust from which it was born. Over time, the hydrogen gas in the nebula is pulled together by gravity and it begins to spin. … The outer shell of the star, which is still mostly hydrogen, starts to expand.
What is it like inside a nebula?
The inside of a nebula would not look that much different from what we see when we look out at space. In the visible spectrum is may look like a faint haze or darkening of the stars. … These images are combined to highlight the nebula. Often you can see right through them in some wavelengths of light.