Near the core, it heats up to 9,000 degrees Fahrenheit (4,982 degrees Celsius). | Michael Row

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Near the core, it heats up to 9,000 degrees Fahrenheit (4,982 degrees Celsius).

Michael Row

Daniels — 2020-11-29 00:59:35 UTC

pereztaylor — 2020-12-01 21:43:30 UTC

In 2007, researchers used ground-based radars to study the core, and found evidence that it is partly molten (liquid).

148d — 2020-12-03 00:50:17 UTC

Haumea and two small moons -- Hi'iaka and Namaka -- make up the family.

The atmosphere is mostly hydrogen and helium, and its iconic Great Red Spot is a giant storm bigger than Earth that has raged for hundreds of years.
The pressure of sunlight and high-speed solar particles (solar wind) can blow the coma dust and gas away from the Ssun, sometimes forming a long, bright tail.
Meteor showers are usually named after a star or constellation that is close to where the meteors appear in the sky.
It is the ions escaping from this torus that inflate Jupiter's magnetosphere to over twice the size we would expect.
But the sun doesn't rise and set each "day" on Venus like it does on most other planets.
He forwarded the name to the Lowell Observatory and it was selected.
That discovery marked our first glimpse of the long-sought Kuiper Belt, named after Gerard Kuiper who, in 1951, proposed that a belt of icy bodies might lay beyond Neptune.
Mountains are also seen rising 6500 to 9800 feet (2 to 3 kilometers) above their surroundings.
- As Ceres orbits the sun, it completes one rotation every 9 hours, making its day length one of the shortest in the solar system.
- Mercury's outer shell, comparable to Earth's outer shell (called the mantle and crust), is only about 400 km (250 miles) thick.
- The calculated diameter of a KBO depends on assumptions about how reflective the object's surface is.
- The temperature reaches about 260 degrees Fahrenheit (127 degrees Celsius) when in full sun, but in darkness, the temperatures plummets to about -280 degrees Fahrenheit (-173 degrees Celsius).
- Enraged, Zeus struck the Titans with lightning.
- Asteroids, sometimes called minor planets, are rocky remnants left over from the early formation of our solar system about 4.6 billion years ago.
- Saturn is named for the Roman god of wealth and agriculture, among other things.
- The rover's twin, Spirit, also found the signature of ancient water near its landing site, halfway around Mars from Opportunity's location.
- The Harvard Smithsonian Center for Astrophysics keeps a fairly current list of asteroid names.

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Lrpbpd4OuY — 2020-12-03 03:23:40 UTC

Along Europa's many fractures, and in splotchy patterns across its surface, is a reddish-brown material whose composition is not known, but may hold clues to the moon's potential as a habitable world.
Eris, another dwarf planet even more distant than Pluto, has a small moon of its own, named Dysnomia.
When the sun starts to die, it will swell so big that it will engulf Mercury and Venus and maybe even Earth.
Phobos, the innermost moon, is heavily cratered, with deep grooves on its surface.
The little moons Nix and Hydra are about two to three times as far from Pluto as Charon and roughly 5,000 times fainter than Pluto.

A partially molten layer with a thickness of 93 miles (150 kilometers) surrounds the iron core.

Myers — 2020-12-03 08:29:31 UTC

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Data from MESSENGER's scientific instruments have provided a trove of scientific discoveries.
Even though Venus is similar in size to the Earth and has a similarly-sized iron core, Venus' magnetic field is much weaker than the Earth's due to Venus' slow rotation.
- More frequent visitors to the inner solar system are called short-period comets.
- Mountains are also seen rising 6500 to 9800 feet (2 to 3 kilometers) above their surroundings.
- Then in 2006, astronomers designated Ceres a dwarf planet, since it matched the criteria used to classify Pluto and similar-sized objects in the outer solar system.
- In 1675, Italian-born astronomer Jean-Dominique Cassini discovered a "division" between what are now called the A and B rings.
- Dark surface coloring appears to be due carbon residues called tholins.
- In fact, Ceres could be composed of as much as 25 percent water.
- Some people call the far side — the hemisphere we never see from Earth — the "dark side", but that's misleading.
- When charged particles from the solar wind become trapped in Earth's magnetic field, they collide with air molecules above our planet's magnetic poles.
- Data from the Galileo spacecraft indicate that Jupiter's ring system may be formed by dust kicked up as interplanetary meteoroids smash into the giant planet's small innermost moons.
- The Kuiper Belt is a disc-shaped region beyond Neptune that extends from about 30 to 55 astronomical units (compared to Earth which is one astronomical unit, or AU, from the sun).
As these planets grew in the early solar system, they were able to capture objects with their large gravitational fields.
While a spacecraft would have nowhere to land on Jupiter, it wouldn't be able to fly through unscathed either.
Since spacecraft are very effective at spotting comets many comets have LINEAR, SOHO or WISE in their names.
The innermost layer may be made of water ice and vapor.
The parent body, Haumea, apparently collided with another object that was roughly half its size.
With an axial tilt of just 3 degrees, Venus spins nearly upright, and so does not experience noticeable seasons.

m0a2 — 2020-12-04 07:13:02 UTC

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He chose these names because Saturn, known in Greek mythology as Cronus, was the leader of the Titans.

mary09 — 2020-12-07 02:43:10 UTC

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YrOBq58 — 2020-12-12 15:48:43 UTC

Almost the entire planet has now been imaged, revealing a surface that has been shaped both by extensive volcanism and impacts.

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The surface features could smooth out over time if ice or another lower-density material, such as salt, is just below the surface.

smithcoopereEVH — 2020-12-14 13:39:39 UTC

These objects are called meteoroids as they are hurtling through space, becoming meteors for the few seconds they streak across the sky and create glowing trails.

taylormartinez — 2020-12-15 03:42:50 UTC

The rocks are very much like Earth rocks with some distinctive compositions that indicate martian origin.

amber50Ib — 2020-12-15 16:54:26 UTC

The discovery, along with three other Jovian moons, was the first time a moon was discovered orbiting a planet other than Earth.

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LauraMartinezdHFgw4XF — 2021-01-03 21:00:17 UTC

The little moons Nix and Hydra are about two to three times as far from Pluto as Charon and roughly 5,000 times fainter than Pluto.

The crust has a thickness of about 43 miles (70 kilometers) on the moon's near-side hemisphere and 93 miles (150 kilometers) on the far-side.

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roberta64gCH — 2021-01-13 23:49:20 UTC

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With a surface age of about 4 billion years, Callisto has the oldest landscape in the solar system.

Lambert — 2021-01-14 10:39:16 UTC

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reedscott — 2021-01-16 09:18:47 UTC

The over 60 known martian meteorites were blasted off Mars by meteoroid impacts.
Ceres does not have any moons.
In the animated feature Titan A.E., Earth has been destroyed by an alien species, but a well-placed planet builder recreates it and all the species that live on it.
- The energy produced in the core powers the sun and produces all the heat and light the sun emits.
- Venus is covered in craters, but none are smaller than 0.9 to 1.2 miles (1.5 to 2 kilometers) across.
- Its equator is tilted with respect to its orbital path around the sun by just 3 degrees.
- The particles and gas escape the surface at jet speed at approximately 800 miles per hour (400 meters per second).
- One of the most unusual KBOs is Haumea, which is a part of a collisional family orbiting the sun.
- As theorized by astronomer Gerard Kuiper in 1951, a disc-like belt of icy bodies exists beyond Neptune, where a population of dark comets orbits the sun in the realm of Pluto.
- Earth's moon has no moons of its own.
- It was the only way, he figured, to solve a baffling mystery about comets: Some comets loop through the solar system on periodic orbits of a half-dozen years or so.
NASA's Galileo mission, which explored the Jupiter system from 1995 to 2003, made numerous flybys of Europa.
The inner moons appear to be about half water ice and half rock.
The first planet found with the aid of a telescope, Uranus was discovered in 1781 by astronomer William Herschel, although he originally thought it was either a comet or a star.
From an average distance of 1.8 billion miles (2.9 billion kilometers), Uranus is 19.8 astronomical units away from the sun.
There may be hundreds of billions, even trillions, of icy bodies in the Oort Cloud.
Io is named for the daughter of Inachus, who was raped by Jupiter.

dXY0Ev — 2021-01-25 11:17:06 UTC

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In 2011 and 2012, scientists used Hubble to spot two more moons (originally designated P4 and P5).
One Mercury solar day (one day-night cycle) equals 175.97 Earth days.
Jupiter has the shortest day in the solar system.
1. Small meteoroids burn up in the dense atmosphere, so only large meteoroids reach the surface and create impact craters.
2. In the stories, the Titans were the ancestors of the human race.
3. Instead of an atmosphere, Mercury possesses a thin exosphere made up of atoms blasted off the surface by the solar wind and striking micrometeoroids.
4. This unit provides an easy way to quickly compare planets' distances from the sun.
5. Neptune has 13 known moons.
6. Using the predicted parameters of Le Verrier (Adams never published his predictions), Johann Galle discovered the planet in 1846.
7. One of the dayside fractures is seen as a double-walled graben-like structure.
8. In 2008, NASA's Phoenix Mars lander was the first mission to touch water ice in the Martian arctic.
9. Mercury's outer shell, comparable to Earth's outer shell (called the mantle and crust), is only about 400 km (250 miles) thick.
10. Early Earth experienced many large meteorite impacts that caused extensive destruction.
Researchers suspect methane could be belched into Titan's atmosphere by cryovolcanism, or volcanoes with water as lava.
Above that is a mantle made of hot rock slowly churning due to the planet's interior heat.
1. Ceres formed along with the rest of the solar system about 4.5 billion years ago when gravity pulled swirling gas and dust in to become a small dwarf planet.
2. In other stories, Earth has been abandoned or destroyed, such as in the Joss Whedon series Firefly or the book and its film adaptation The Hitchhiker's Guide to the Galaxy.
3. With its global ocean, unique chemistry and internal heat, Enceladus has become a promising lead in our search for worlds where life could exist.
4. Scientists came to informally call the deep crevasses "tiger stripes".

Instead, this is the outer layer of the gassy star.