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Planetary Science
Planetary Science is the study of Planets and the Solar System, a combination of Astronomy and Earth Sciences. Find questions about the different planets and more.
25,144 Questions
Rocky objects measuring millimeters to kilometers in diameter generally orbit the sun in a region located between Mars and Jupiter known as the asteroid belt. This region is characterized by numerous small, irregularly-shaped objects that vary in size and composition. These asteroids orbit the sun in orbits that are typically between Mars and Jupiter.
Accelerated. The concept of "uniform motion" is a mathematical abstraction, like an infinite plane.
ALL mass in the universe is constantly being accelerated by gravitational forces from every other mass in the universe. Specifically, a satellite in orbit is constantly falling toward the Earth under gravity - but because of the inertia of the satellite, it is continually missing the Earth! In the absence of gravity, the satellite would proceed in a straight line tangent to its current elliptical orbit.
Well the answer is in the question.
A light year is the distance it takes light to travel in one year.
If something is a 100 light years away, then it will take light ..........
Atoms in the body rotate on the same axis as the earth?
Yes, the atoms in the body rotate at the same rate on the same axis that the Earth rotates, giving us a direct connection with the place we call Earth..
Comment: I don't know if that's meant to be a joke. Obviously it's not true.
How long does it take the moon to obit the sun?
The same as Earth - Earth and Moon orbit the Sun together.
Does mars have grassy areas like the earth?
Mars does not have any plant life and there is no absolute evidence that it ever did. Some Earth-type plants might survive in the cold, dense air of the Martian poles, but there is no liquid water at all on the surface.
Why can you see planets in the night sky even though they are not luminous?
Light from the Sun reflects off of its surface. This also applies to why you cans see all the planets and their moons as well.
What is the most powerful planet?
It is subjective to determine the "most powerful" planet, as each planet has unique characteristics. In our solar system, Jupiter is often considered the most powerful due to its immense size, strong magnetic field, and gravitational influence on other planets.
For stable orbit @ 6 700 000 metres
Velocity = sq. root ( G * mass earth / orbit radius ) = 7713.576 metres / sec
Time for (sidereal) orbit = (2 * pi * radius) / velocity = 5457.56 seconds.
Stars are approximately the same age as their orbiting planets?
Yes. for a given system, the age of the planets and the central star would be about the same, as the planetary disc would have formed in one go. Most of the mass would go into the central star, with the remaining material in orbit slowly developing into the planets we have today.
What are bodies that orbit moons or planets called?
Satellites.
They can be natural (a moon) or artificial (space probes).
Earth is a satellite of the Sun, the Moon is a satellite of the Earth and the Lunar Reconnaissance Orbiter is a satellite of the Moon.
No, Vega is a main-sequence star, meaning it is currently fusing hydrogen into helium in its core. The star is relatively young compared to our Sun, so it still has a long life ahead of it on the main sequence.
When the distance between the centers of two planets decreases to 1/10th of the original distance,
the gravitational force between them increases to 100 times the original force.
How many million kilometers is earth to the sun?
The distance from Sun to Earth is about 150 million kilometers; Earth's orbit is (approximately) circular, so just use the formula for the circumference of a circle (= 2 x pi x radius), using 150 million kilometers for the radius.
The distance from Sun to Earth is about 150 million kilometers; Earth's orbit is (approximately) circular, so just use the formula for the circumference of a circle (= 2 x pi x radius), using 150 million kilometers for the radius.
The distance from Sun to Earth is about 150 million kilometers; Earth's orbit is (approximately) circular, so just use the formula for the circumference of a circle (= 2 x pi x radius), using 150 million kilometers for the radius.
The distance from Sun to Earth is about 150 million kilometers; Earth's orbit is (approximately) circular, so just use the formula for the circumference of a circle (= 2 x pi x radius), using 150 million kilometers for the radius.
Is a proto star bigger than a star?
Short answer: Yes
The latin root "proto-" means early, or earliest. As a star is an approximately spherical mass of matter undergoing a fusion/fission reaction due to the enormous pressures created at the center of the star due to its massive density. By this logic, we know that a protostar or "early star" is something which isn't yet, but will become a star in the future. By observing the universe and understanding the composition of stars, we've theorized that stars (and their solar systems) are usually formed by nebulae. As the nebulous cloud condenses under its own gravitational pull. Eventually the density reaches a point where the fission/fusion reaction can occur. So it follows that the nebula, is less dense (and by requirement), more voluminous. So a protostar takes up a much greater space, and would appear larger, but it would be less dense. We also have to remember that the size of stars varies. You could compare one protostar to another existing star, but the comparison wouldn't tell you anything about the relative sizes of the two different objects. IE: a big star would've been an even bigger protostar, and a small star would have been a smaller protostar.
Saturn is both hotter and colder than Earth.
Saturn is a gas giant planet with a deep atmosphere of hydrogen, crushingly dense near the rocky core. The outer clouds are too cold, more than a hundred degrees below freezing, but the pressure farther down raises the temperature to hotter than the surface of the Sun.
Mares in foal need to have a higher protein content in their feed compared to a non-pregnant mare especially the last 3 months when a foal does the greatest amount of growing. A protein level near 16% and a good vitamin mineral mix with high vit D and calcium should be fed the last 3 months. A mare that is working will need more calories and protein earlier than one that isn't being worked.
Is Jupiter is the biggest planet?
Jupiter is the largest planet because of it's position in the Solar System.
It is located past what is known as the "frost line" [See related link] where it was possible for hydrogen to condense into solid ice grains. because - the then Jupiter - had the "Lions" share of free hydrogen, it grew to an immense size.
How can the mass of a planet be used to aid probes in space such as voyager?
Well, Voyager is now well beyond much useful gravitational influence of any of the solar system's planets. What we have learned is that planetary gravity wells can be used to provide a boost to passing spacecraft. Since Voyager most spacecraft to the outer planets spend some time in the inner system first, performing slingshots from one planet to the next to increase velocity.
Each of these maneuvers robs a wee bit of the planet's angular momentum.
Why do planets need their stars?
Planets need their stars for heat and light, which are essential for supporting life and maintaining stable surface temperatures. Additionally, the gravitational pull of the star helps to keep planets in orbit around it.
What types of literary atmospheres are there?
Some common types of literary atmospheres include mysterious, romantic, suspenseful, and oppressive. These atmospheres are created through various elements such as setting, tone, and imagery to evoke specific emotional responses from the reader. Each atmosphere serves to enhance the overall mood and tone of a literary work.
What is the smallest moon orbiting any of the terrestrial planets?
Deimos, the smaller of the two moons of Mars, is the smallest moon in the solar system to orbit a terrestrial planet. It is irregular in shape but averages about 12 kilometers or about 9 miles across.
What is the properties of light causes eclipse?
During an eclipse, the properties of light that cause it are the blocking of light by an intervening object (e.g. the moon passing between the sun and Earth during a solar eclipse) and the scattering or bending of light (e.g. the Earth's atmosphere scattering sunlight to create a red color during a lunar eclipse).
Stars leave the main sequence when they?
Stars leave the main sequence when they have exhausted their core hydrogen fuel, causing them to expand into red giants or supergiants. This transition marks the end of stable nuclear fusion in their cores and the beginning of the next phase in their lifecycle.
