Tim Sharp
SPACE.com
Topeka, KS, United States
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Past articles by Tim:
The First Hot-Air Balloon Flight
The Montgolfier brothers launched the first flight of a hot-air balloon in 1783, paving the way for further human exploration of the sky. → Read More
SpaceShipOne: The First Private Spacecraft
A major turning point for private spaceflight occurred on June 21, 2004, when SpaceShipOne, the first nongovernmental crewed spacecraft, flew 62.5 miles (100 kilometers) above Earth's surface. → Read More
Edmond Halley: An Extraordinary Scientist and the Second Astronomer Royal
Edmond Halley is best remembered for predicting the orbit of the comet that was later named after him. Besides astronomy, he also made significant discoveries in the fields of geophysics, mathematics, meteorology and physics. → Read More
Saturn V Rockets & Apollo Spacecraft
The Apollo moon missions were launched from the largest, most powerful rocket ever made. The Apollo spacecraft were specially designed to carry astronauts safely to and from the moon. → Read More
World’s First Commercial Airline
The first scheduled passenger airline service took off from St. Petersburg, Fla. → Read More
What Is the Temperature on Earth?
The average temperature on Earth is 61 degrees F (16 C). The hottest temperature ever recorded was 159.3 F (70.7 C) and the coldest temperature was minus 128.6 F (minus 89.2 C). → Read More
Valentina Tereshkova: First Woman in Space
Valentina Tereshkova was the first woman to go into space. She flew Vostok 6 in 1963, spending almost three days in space and orbiting Earth 48 times. → Read More
Alpha Centauri: Nearest Star System to the Sun
Proxima Centauri, a red dwarf outlier in the Alpha Centauri system, is the nearest star other than the sun. It is 4.22 light-years from Earth. → Read More
How Far Away is Mars?
The distance to Mars from Earth or the sun is tough to pin down because of the planets' different orbits. → Read More
Space Shuttle: The First Reusable Spacecraft
The space shuttle was designed to carry large payloads into orbit, service them, and bring them back to Earth if necessary. → Read More
How Was Mars Made?
Mars formed 4.6 billion years ago along with the solar system when a nebula collapsed and dust clumped together to form the sun, planets, asteroids and comets. → Read More
What is Mars Made Of?
Mars' surface is covered by iron dust and volcanic basalt rock. The composition of Mars consists of minerals, metals and other elements. → Read More
What is the Temperature of Mars?
Mars is a very cold planet. Temperatures don't get much above 70 degrees F and they can get down to nearly minus 200 degrees F. → Read More
What Is the Sun Made Of?
The sun is composed of several layers where hot gases are converted into energy and released as heat and light. → Read More
Atmosphere of the Sun: Photosphere, Chromosphere & Corona
The sun's atmosphere has three layers: the photosphere, the chromosphere and the corona. → Read More
2017 Moon Phases Calendar
Find out the current moon phase for the coming year. The lunar calendar shows when the next new moons and full moons occur. → Read More
How Big is the Sun?
Earth's star is the largest and the most massive object in the solar system. More than 1 million Earths could fit inside the sun. → Read More
What Is a Blue Moon?
A Blue Moon is not typically blue, but it can be. Find out why there are two definitions of Blue Moon and learn when is the next Blue Moon. → Read More
How Far is the Moon?
A trip to the moon takes about three days to travel more than 250,000 miles. → Read More
What is the Temperature on the Moon?
The surface of the moon experiences great extremes in temperature, from boiling hot to freezing cold. → Read More