• Plate Tectonics Keep the Planet Comfortable:
• Earth is Almost a Sphere:
• Earth is Mostly Iron, Oxygen and Silicon:
• 70% of the Earth’s Surface is Covered in Water:
• The Earth’s Atmosphere Extends to a Distance of 10,000 km:
• The Earth’s Molten Iron Core Creates a Magnetic Field:

Here are some other physical characteristics of the Sun. Surface: The Sun, like all stars, is a glowing ball of gas. Even if a spaceship could withstand the heat, it could not land on the Sun because the Sun’s surface is not solid. Atmosphere: Because the Sun is made up of gas, it has a very thick atmosphere.

Some features of the Sun’s surface include sunspots, solar flares, and prominences.

Characteristics of the Sun

• Mass: 1.98892 x 1030 kg.
• Diameter: 1,391,000 kilometers.
• Radius: 695,500 km.
• Surface gravity of the Sun: 27.94 g.
• Volume of the Sun: 1.412 x 1018 km3
• Density of the Sun: 1.622 x 105 kg/m3

Which star is the hottest​

• The Star WR102 which is a blue star with surface Temperature of over 2,10,000 kelvin is the hottest star ever recorded. With an increase in Temperature, the star turns bluish in color.
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The star alpha centauri a is the same type of star as the sun, but its luminosity is about 1.6 times that of the sun.

Although the star VY Canis Majoris in the constellation Canis Major has a much cooler surface temperature than our sun, this star’s sheer size makes it a super-luminous star. Its radius is thought to be around 1400 times than of our sun, and its luminosity 270,000 greater than our sun.

Antares

Brightest Stars.

	Common Name	Absolute Magnitude
1	Sirius	1.45
2	Canopus	-5.53
3	Arcturus	-0.31
4	Rigel Kentaurus	4.34

The brightest star in the sky is Sirius, also known as the “Dog Star” or, more officially, Alpha Canis Majoris, for its position in the constellation Canis Major. Sirius is a binary star dominated by a luminous main sequence star, Sirius A, with an apparent magnitude of -1.46.

Deneb is a bluish-white supergiant around 200 times the size of the Sun and burning through its fuel at a rapid rate. Deneb shines bright in the constellation Cygnus. Some well-known bright stars such as Vega, Sirius, and Alpha Centauri appear bright in our sky primarily because they are relatively close to us.

Deneb is a supergiant (as noted by its luminosity class: Ia), which means it has a huge radius. So even though there are stars hotter than Deneb on the list, Deneb must be bigger than them. What is significant about Star 2? Sirius is the brightest star in the night sky.

Sirius, also known as the Dog Star or Sirius A, is the brightest star in Earth’s night sky. The name means “glowing” in Greek — a fitting description, as only a few planets, the full moon and the International Space Station outshine this star. Because Sirius is so bright, it was well-known to the ancients.

The three important characteristics of earth are :

• Earth has life in the form of living organisms.
• It has oxygen present in the atmosphere.
• It’s 75% part is filled with water.

The physical characteristics of the Earth include its size and composition. The Earth also has gravity and magnetic force fields. Physical characteristics include shape, size and composition. Just as the Sun and Moon appear as spheres, so too is the Earth spherical in shape.

The surface of the Sun produces sound waves because the surface is convecting and this produces pressure waves that travel into the inner corona. But yes, the surface does produce sound waves, but they have very low wavelengths measures in hundreds of miles!

The seventh planet from the sun, Uranus has the coldest atmosphere of any of the planets in the solar system, even though it is not the most distant.

Mass of Mars is lesser than that of Earth which means the time passes faster there relative to Earth. Hence, you would age faster on Mars relative to Earth.

Flying through outer space has dramatic effects on the body, and people in space experience aging at a faster rate than people on Earth. These studies showed that space alters gene function, function of the cell’s powerhouse (mitochondria), and the chemical balance in cells.

3 people

No. The time-dilation effect of Einstein’s relativity has nothing to do with space. The faster you’re moving, the slower time goes for you. So if you were on some planet moving extremely fast through space, like in the movie Interstellar, then you could miss 7 years on Earth every hour.

Time passes about 0.66 parts per billion faster on the Moon than on Earth, due to not being in as strong a gravity field.

A total of 18 people have lost their lives either while in space or in preparation for a space mission, in four separate incidents. All seven crew members died, including Christa McAuliffe, a teacher from New Hampshire selected on a special NASA programme to bring civilians into space. …

How Long Is Today?

Today’s Day Length* in Context
	Day length	Date
Today	24 hours -0.80 ms	Wed, Jun 23, 2021
Tomorrow	24 hours -1.03 ms	Thu, Jun 24, 2021
Shortest 2021	24 hours -1.32 ms	Thu, Aug 5, 2021

“How many hours” is correct. Yet focusing on that answer might screw you up when you twist your thought around. “How much time did you spend on the road?” “It was three hours.” When we talk about amounts and quantities we usually use singular determiners, verbs and pronouns, even if the noun is plural.

48 Hours

Answer. 16 hours is the answer . 2/3×24=16 .

In 8 d there are 192 h . Which is the same to say that 8 days is 192 hours.

Convert 19 Hours to Days

hr	d
19.00	0.79167
19.01	0.79208
19.02	0.7925
19.03	0.79292