Planetary Science

The 12 largest objects in our solar system include the eight traditional planets (Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune), as well as four dwarf planets recognized by the International Astronomical Union: Pluto, Eris, Haumea, and Makemake.

The sun is essential for life on Earth because it provides heat and light energy that drive processes like photosynthesis, which is how plants produce oxygen and food. The sun's energy also regulates Earth's climate and weather patterns, creating the conditions necessary for life to thrive. Without the sun, Earth would be cold, dark, and unable to support the diverse ecosystems present today.

small, dense, and rocky

Mercury and Mars do not have significant atmospheres. Mercury's atmosphere is extremely thin and mainly consists of gases released from the planet's surface, while Mars' atmosphere is very thin, composed mostly of carbon dioxide with trace amounts of other gases.

Protoearth was a molten and barren planet with high temperatures due to intense impacts from other celestial bodies. It lacked an atmosphere and water. Today's Earth is cooler, has a stable surface, rich in biodiversity with oceans, and a protective atmosphere.

Terrestrial planets and gas planets both orbit a star, have a spherical shape due to gravity, and are a part of our solar system. Additionally, they formed from the same materials in the early stages of the solar system's formation.

Galaxies, such as the Milky Way and Andromeda, are sources of light that have been found to be collections of billions of stars rather than individual stars. These galaxies contain vast numbers of stars, dust, and gas held together by gravity.

They revolve at varying distances. Mercury orbits half the distance earth does, Venus 3/4, Mars 1.5, Jupiter 3, and Saturn 10 times as far.

Pluto, however, sometimes comes within the orbit of Neptune. It is possible our most distant gas giant may some day sweep up the little dwarf and its four moons.

The chemical composition of every planet is unique but the Moon's composition is similar to Earth's which leads us to believe that the Moon came from the Earth. However, a theory was generated that another planet collided with Earth and created the moon.

eight million miles

Mars has a longer year (687 Earth days) due to its greater distance from the sun, which results in a longer orbit. This longer orbit causes its seasons to be about twice as long as Earth's. Additionally, Mars has a more elliptical orbit compared to Earth, which can also impact the length and intensity of its seasons.

Objects are attracted to other objects. now this is much more complex than that but I neither have the technical knowledge or time to truly explain all that. So because particles are attracted to each other the more mass an object has the more it pulls or attracts other objects, we call this force gravity. Objects such as planets that are orbiting other things (typically stars due to their massive size) are in a place where the force of gravity is not allowing them to escape but not entirely pulling them in.

Stars (like the Sun) and planets form from fast-swirling clouds of dust. When their force of gravity is great enough, the swirls clump together into a spherical ball. That does not make them stop spinning or stop them from orbiting the Sun.

We see that there is very little to make the spinning, orbiting planets slow their spins or orbits.

If you look down, you will see the surface of the moon. If you look up, you will be able to see other celestial bodies in the sky, such as Earth, stars, other planets, etc., as long as they are not currently below the horizon of the moon. However, since the moon keeps the same face toward the Earth, if you are not on the side facing Earth, you will not see the Earth at all.

The east was generally less progressive towards women's suffrage than the midwest and west due to traditional gender norms and conservative attitudes prevalent in the east. Additionally, the east had stronger ties to established social structures and old money, which were more resistant to change compared to the more liberal and pioneering attitudes of the midwest and west.

Earth's sun is a G-type main-sequence star, also known as a yellow dwarf star. It is part of a system called the solar system, which includes planets, moons, asteroids, and comets. The sun is about 4.6 billion years old and is in the middle of its life cycle.

A "Day" relates to the rotation of the planet. The giant Saturn spins around, or rotates, once every 10 hours and 45 minutes. So it's "Day" is only 10 hours 45 minutes (earth hours) long. Whereas Earth spins slower so its day is longer.

One complete revolution of the Earth around the sun takes 365.25 days. A day is 24 hours, which is the time it takes the earth to revolve on it's axis plus the time it takes to catch up with the sun, which has moved 1/365.25 of one rotation away from where it was the day before. So the time for one rotation of the the Earth is one day minus 1/365.25th of a day, which is 23 hours, 56 minutes, 4.091 seconds. This is known as a Sidereal Day.

Most of the inner planets have a volcano core. Really hott and boiling. But the outer planets are gassy so yes the inner planets are mostly rock! and so sorry bout the last person who answer. ; )

There are 195 countries in the world just see for yourself A Afghanistan Albania Algeria Andorra Angola Antigua & Barbuda Argentina Armenia Australia Austria Azerbaijan B Bahamas Bahrain Bangladesh Barbados Belarus Belgium Belize Benin Bhutan Bolivia Bosnia & Herzegovina Botswana Brazil Brunei Darussalam Bulgaria Burkina Faso Burma (Myanmar) Burundi C Cambodia Cameroon Canada Cape Verde Central African Republic Chad Chile China Colombia Comoros Congo Congo, Democratic Republic of the Costa Rica Côte d'Ivoire Croatia Cuba Cyprus Czech Republic D Denmark Djibouti Dominica Dominican Republic E Ecuador East Timor Egypt El Salvador England Equatorial Guinea Eritrea Estonia Ethiopia F Fiji Finland France G Gabon Gambia, The Georgia Germany Ghana Great Britain Greece Grenada Guatemala Guinea Guinea-Bissau Guyana H Haiti Honduras Hungary I Iceland India Indonesia Iran Iraq Ireland Israel Italy J Jamaica Japan Jordan K Kazakhstan Kenya Kiribati Korea, North Korea, South Kosovo Kuwait Kyrgyzstan L Laos Latvia Lebanon Lesotho Liberia Libya Liechtenstein Lithuania Luxembourg M Macedonia HYPERLINK "/ipka/A0107743.html"Madagascar Malawi Malaysia Maldives Mali Malta Marshall Islands Mauritania Mauritius Mexico Micronesia Moldova Monaco Mongolia Montenegro Morocco Mozambique Myanmar N Namibia Nauru Nepal The Netherlands New Zealand Nicaragua Niger Nigeria Norway Northern Ireland O Oman P Pakistan Palau Palestinian State* Panama Papua New Guinea Paraguay Peru The Philippines Poland Portugal Q Qatar R Romania Russia Rwanda S St. Kitts & Nevis St. Lucia St. Vincent & The Grenadines Samoa San Marino São Tomé & Príncipe Saudi Arabia Scotland Senegal Serbia Seychelles Sierra Leone Singapore Slovakia Slovenia Solomon Islands Somalia South Africa Spain Sri Lanka Sudan Suriname Swaziland Sweden Switzerland Syria T Taiwan Tajikistan Tanzania Thailand Togo Tonga Trinidad & Tobago Tunisia Turkey Turkmenistan Tuvalu U Uganda Ukraine United Arab Emirates United Kingdom United States Uruguay Uzbekistan V Vanuatu Vatican City (Holy See) Venezuela Vietnam X W Western Sahara* Wales Y Yemen Z Zaire Zambia Zimbabwe

The difference would be too small to calculate accurately. Earth's distance from the sun already varies by about 2 million miles over the course of a year, reaching its closest point of about 92 million miles in January and its farthest point of about 94 million miles in July.

The polar regions would be much warmer all ice would melt and sea levels would rise by hundreds of feet. The equator would be cooler than it is now.

The polar regions, and territories north of the Tropics would experience a more variable climate. The land of the midnight sun (in summer) and of no sun (in winter) would reach much further south, and the Aurora would be visible much further south and might be more spectacular. Climate in general would probably be much different from what we know today.

Both Earth and Mars have atmospheres composed primarily of carbon dioxide. They both experience weather patterns and have polar ice caps. However, Earth's atmosphere is significantly thicker and has more oxygen than Mars.

Depending on your eyesight (everyones' is different) and the amount of air pollution and light pollution, people with "good" eyesight and in a clear, DARK area can generally just barely see a seventh-magnitude star.

Look at the Big Dipper, if you live in the northern hemisphere. People usually look at the Big Dipper and follow the "pointer" stars Merak and Dubhe straight out to the north star, Polaris. But I want you to look at the handle of the dipper, the middle star in the handle. The middle star is Mizar, and it is magnitude 2.2; not especially bright, but most everybody can see it. But look closely; is that ONE star, or are there two?

There are two; the dimmer star is Alcor, and it is just above 4th magnitude. Julius Caesar's Legions used that star as an eye test; if you could see Alcor, then your vision was good enough to be an archer; otherwise, you were a swordsman.

Earth measures its days to be 24 hours and has 365 days in a year (366 on leap-year). This is based off of the Earth's orbit and rotation around the sun. All the other planets have different rates at which they spin on their axes, and different lengths of time for them to complete their orbit around the sun.

A tiny fraction. Light travels at 300,000 km PER SECOND, so 384,403 km (the approximate mean distance between the Earth and the Moon) would be about 1.3 light-seconds