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The Solar System
Ever wondered if there is life on Mars? Or if Jupiter has five moons? Look no further; here is the category concerning all questions about our solar system and the known planets!
4,302 Questions
Are there any mermaids alive in your solar system?
None have been scientifically verified. However, many mermaids have lived in the minds of sailors, children and other imaginative people. Some people say that if you can make it alive in your mind, then it is alive in at least that sense!
The sun emits light in all directions pretty much equally. Only a very small fraction of it happens to be pointed at Earth. Some of the rest strikes other planets (or asteroids, or comets, or whatnot) in the solar system, but most of it goes out into interstellar space.
How does the curiosity not float away while on Mars?
Just like Earth's gravity holds you to Earth, and doesn't let you float away, Mars, too, has some gravity (less than Earth), which won't simply let objects float away into space.
Within the inner 0.3 AU of the solar system before planets began to form, solid flakes of materials such as silicates, metals, and ices would have been present. These materials likely condensed from the hot protoplanetary disk surrounding the young Sun, forming the building blocks that eventually came together to form the planets.
What planets were used in Ptolemy's and Copernicus' theories?
Only Mercury, Venus, Earth, Mars, Jupiter, and Saturn.
Uranus was discovered in 1781, Neptune in 1846, and Pluto n 1930.
Does weight change from the moon to the earth?
Yes, because the force of gravity depends on the distance between the two masses. We feel a constant weight due to gravity at the surface of the Earth because we are always at the same distance, equal to the radius of the Earth (Historikeren 15-07-2015).
hydrogen and helium
What is at the center of heliocentric model?
In the Heliocentric model, the SUN is in the center. The word 'Helio' refers to SUN. 'Centric' refers to center. So its ' SUN-Center.
By looking at the spectrum of its light and finding out which absorbtion lines can be seen. The lines correspond to specific elements in the outer parts of the star.
How the astronauts able to see earth on the moon?
The astronauts on the moon were able to see the earth at all times, though not the same face of earth each time. Unlike on earth, from an observers fixed position, the moon would be in view between moon rise and moon set, only.
Why are sunspot darker than surrounding areas?
Sunspots are darker because they are cooler than the surrounding area.
What is difference between real solar system and a project solar system?
A typical science project model will almost by default show the planets too large for the orbits / too close for their sizes.
If the model was six feet across, and in true scale, the Earth would be only one inch from the Sun and won't be visible without a jeweler's loupe.
If the Earth was a respectable inch in diameter and the other planets and orbits to scale, the Sun would be more than eight feet tall and over two miles away!
How does a nebula form a solar system?
A nebula is a region of gas, mostly hydrogen, that is denser than the surrounding space. When these gas clouds are disturbed (by gravity, or by a shock wave), they can condense enough to let gravitational forces begin to gather the molecules together into clumps. Over a period of millions of years, the gas may collect (accrete) into a mass large enough to form a spinning disk, with a proto-star forming at the center. With enough swept-up hydrogen, the new star will start a fusion reaction at its hot, dense core. Pushed away by this energy release, the disk will no longer be drawn inward, but can coalesce into planets and planetoids orbiting the new star.
Which objects in the solar system orbit directly around the sun and which don't?
The planets,asteroids,and comets. There is nothing that doesn't orbit the sun.
What day will the Sun rise exactly in the east and set exactly in the west?
The equinoxes (approximately 21 March & 21 Sept).
Why would it be difficult to travel to another solar system?
The basic problems to overcome:
- Distance, the closest is 4 light years, as we have not figured out how to travel as fast as light or faster, we will be many decades traveling there. It will take so long that the children or grand children will arrive, not the people that leave on the ship.
- Living in a space ship for many many years without going crazy or dieing from radiation or other mishap
- Power, as of yet we have not figured out how to power a ship that far and stop it at the far end. There a bunch of good ideas, but no tested system.
- Money to pay for overcoming the problems above.
What happens to the shape of an obit as eccentricity gets smaller?
As the eccentricity reaches zero the two foci merge together and the ellipse becomes a circle.
If a is half the major axis of the ellipse, and e is the eccentricity, the distance between the foci is 2ae. For a planet the Sun occupies one focus and the other is vacant, so the Sun is a distance of ae from the centre of the ellipse.
The minor axis is sqrt(1-e^2) times the minor axis, so for all the planets except Mercury the minor axis is more than 99½% of the major axis. The best way to draw an orbit is to ignore this small difference and draw a circle, and then place the Sun at the right distance off-centre.
What is a solar system or a galaxy?
Solar system is a system not a galaxy. It is located in Milky Way galaxy.
Which planet has the largest and most distinct rings in the solar system?
Saturn they are clearly visible through a decent telescope.
If you want to see some beautiful pictures do a google image search of saturn.
