the spacecraft, which sits in orbit above Earth’s surface, has looked out for asteroids and comets throughout the solar system and has been used to identify those that could come close to Earth.
The Moon Distance Calculator calculates the approximate minumum and maximum distances from the Moon to the Earth. The Moon's distance to Earth varies. The two extreme points of the Moon’s orbit each month are known as thelunar perigee and apogee. The table below shows the time of lunar per...
SpaceX must launch two Starships within about three or four weeks of one another. First, SpaceX will launch a Starship to serve as a target vehicle in low-Earth orbit. This ship will have an augmented power system and more battery capacity to sustain itself in space long enough for t...
Geosynchronous orbits (GEO) – GEO satellites orbit Earth at an altitude greater than 22,223 miles (36,000 kilometers) and their orbital period is the same as Earth’s rotational period: 24 hours. Included in this category are geostationary (GSO) satellites, which remain in orbit above a fi...
How you store your records isn’t just important for preservation, it’s an opportunity to build something that looks really, really cool. But first, we just have to say: Do not use milk crates. Long have they been used by DJ’s to cart their wax back and forth from clubs, but rest...
CE is a continuation of ideas, such as industrial ecology and metabolism. It mainly advocates for closing the loop of currently linear industrial processes. The emphasis is on net reductions in production systems, through a redesign of industrial processes to minimise inputs and outputs, especially...
Halley's Comet takes about 76 years to orbitthe sunonce and will not enter the solar system again until 2061. The comet is named after English astronomer Edmond Halley who examined reports ofcometsapproaching Earth in 1531, 1607 and 1682. He concluded that these sightings were all of the sam...
travel from Io to Earth. Rømer used his observations to estimate the speed of light. Since the size of the solar system and Earth's orbit wasn't yet accurately known, argued a 1998 paper in theAmerican Journal of Physics, he was a bit off. But at last, scientists had a number to...
Today, the well-preserved sections of the Great Wall that we see were mostly built during the Ming Dynasty, with a total length of 8,851.8 kilometers (5,500 miles).Read How Long Is the Great Wall of China to discover the lengths of each popular section of the Great Wall....
Though much of the research conducted by NASA and other space agencies is important to the space programs, the impact of space farming has many real-life applications for Earth. The main benefit and purpose of learning how to farm in space is to enable long-term space exploration -- it's...