Summary: Using data from NASA's Cassini spacecraft, scientists modeled chemical processes in the subsurface ocean of Saturn's moon Enceladus. The studies indicate the possibility that a varied metabolic menu could support a potentially diverse microbial community in the liquid water ocean beneath the moon's icy facade. Read More

Fusion reactions are the primary energy source of stars and the mechanism for the nucleosynthesis of the light elements. The formation of helium is the main source of energy emitted by normal stars, such as the Sun, where the burning-core plasma has a temperature of less than 15,000,000 K. Read More

The trip to Mars will take about seven months and about 300 million miles (480 million kilometers). During that journey, engineers have several opportunities to adjust the spacecraft's flight path, to make sure its speed and direction are best for arrival at Jezero Crater on Mars. Read More

Jupiter, the largest planet in the solar system, has a diameter of about 87,000 miles. (And even Jupiter is tiny compared to the Sun, which is roughly ten times wider than Jupiter, at about 864,000 miles.) Read More

Jupiter is so Big that our Solar System almost had two Suns - Universe Today. Read More

93 billion light-years The proper distance-the distance as would be measured at a specific time, including the present-between Earth and the edge of the observable universe is 46 billion light-years (14 billion parsecs), making the diameter of the observable universe about 93 billion light-years (28 billion parsecs). Read More

Cruithne Its period of revolution around the Sun, approximately 364 days in the early 21st century, is almost equal to that of Earth. Because of this, Cruithne and Earth appear to "follow" each other in their paths around the Sun. This is why Cruithne is sometimes called "Earth's second moon". Read More

The $720 million New Horizons mission launched in January 2006, speeding away from Earth at a record-breaking 36,400 mph (58,580 km/h). Even at that blistering pace, it still took the probe 9.5 years to reach Pluto, which was about 3 billion miles (5 billion km) from Earth on the day of the flyby. Read More

Saturn Saturn is very large and is the second largest planet in the Solar System. However, it is made up mostly of gas and is less dense than water. Since it is lighter than water, it can float on water. Read More

Phillip E. From largest to smallest they are: Universe, galaxy, solar system, star, planet, moon and asteroid. Read More