The Sun is
by far the largest object in the solar system
. It contains more than 99.8% of the total mass of the Solar System (Jupiter contains most of the rest). It is often said that the Sun is an “ordinary” star. That’s true in the sense that there are many others similar to it.
Which is true about the sun?
The Sun is
by far the largest object in the solar system
. It contains more than 99.8% of the total mass of the Solar System (Jupiter contains most of the rest). It is often said that the Sun is an “ordinary” star. That’s true in the sense that there are many others similar to it.
Which of the following is the function of sun?
But for Earth and the other planets that revolve around it, the sun is a powerful center of attention. It holds the solar system together;
provides life-giving light, heat, and energy to Earth
; and generates space weather.
Is the sun hotter than a B2 star?
The hottest stars are class O, while the coolest are class T. … So,
a B1 star is hotter than a B2 star
, and a B9 star is hotter than an A0 star. Our own sun is at the “hot” end of the G range with a surface temperature of 5,770° K; therefore, it’s called a G2 star.
What is the sun mostly made of?
It does not have easily identifiable boundaries like rocky planets like Earth. Instead, the sun is composed of layers made up almost entirely of
hydrogen and helium
. These gases carry out different functions in each layer, and the sun’s layers are measured by their percentage of the sun’s total radius.
Is the sun a supergiant?
The Sun is medium-sized
. … The red supergiant Antares is 800 times wider than the Sun. If it was at the centre of our Solar System, it would swallow up all of the inner planets, including Earth. Like gas guzzler cars, these supergiants use all of their hydrogen and helium fuel very quickly.
What color is the sun?
When we direct solar rays through a prism, we see all the colors of the rainbow come out the other end. That’s to say we see all the colors that are visible to the human eye. “Therefore the sun is
white
,” because white is made up of all the colors, Baird said.
What is the role and importance of the Sun?
Nothing is more important to us on Earth than the Sun. Without the Sun’s heat and light, the Earth would be a lifeless ball of ice-coated rock. The Sun
warms our seas
, stirs our atmosphere, generates our weather patterns, and gives energy to the growing green plants that provide the food and oxygen for life on Earth.
How does the Sun help us?
It
radiates light and heat, or solar energy
, which makes it possible for life to exist on Earth. Plants need sunlight to grow. Animals, including humans, need plants for food and the oxygen they produce. Without heat from the sun, Earth would freeze.
What is the formation of the Sun?
The Sun and the planets formed together, 4.6 billion years ago,
from a cloud of gas and dust called the solar nebula
. A shock wave from a nearby supernova explosion probably initiated the collapse of the solar nebula. The Sun formed in the center, and the planets formed in a thin disk orbiting around it.
Which star is the hottest?
The hottest one measures ~210,000 K; the hottest known star.
The Wolf-Rayet star WR 102
is the hottest star known, at 210,000 K.
Which star has more mass?
About half of all known stars are more massive; about half have less mass. At the top end of the scale, the most massive known star in the sky is
R136a1
, a star more than 300 times as massive as our sun.
Which factor affects the color of the star?
The surface temperature of a star
determines the color of light it emits. Blue stars are hotter than yellow stars, which are hotter than red stars.
Which layer of sun can we see?
the photosphere layer
is the most visible to the human eye. Here the temperature is only about 10,000 degrees F. This layer, which looks like a bright disk, sends light and heat to Earth.
What keeps the sun together?
The Sun’s enormous mass is held together by
gravitational attraction
, producing immense pressure and temperature at its core. … Specifically, in the Sun’s core, hydrogen atoms fuse to make helium. The energy produced in the core powers the Sun and produces all the heat and light the Sun emits.
What is the hottest layer of the sun?
The hottest part of the Sun is
the core
, at 28,080,000°F, on average.
