This takes place around the same time every year, where the Sun shines directly over the equator and distributes the same amount of light on either side of the planet.įor the Northern Hemisphere, this marks the beginning of shorter days and colder weather. Eastern.ĭuring that time, the Sun will be exactly above the Earth’s equator and will appear overhead at noon as seen from the equator. The 2021 fall equinox will take place on Wednesday, Septemat 3:21 p.m. What exact time is the September 2021 fall equinox? Inverse breaks down everything you need to know about this annual event. The seasonal change is actually due to our planet’s tilt on its axis, and a time when the Northern and Southern Hemispheres essentially trade places. Whilst these asteroids passing Earth won't be visible with the naked eye, Apophis' next "fly-by" in April 2029 will be so close at 20,000 miles from Earth, closer than most geostationary satellites, that it will be visible without the aid of a telescope.On September 22, the Sun will cross the celestial equator and mark the beginning of a new season and the September 2021 fall equinox.įor that brief moment during the autumn equinox, night and day are almost exactly equal before the day begins to get shorter. That was until a CNEOS team discovered earlier this year that Earth is safe from an impact by Apophis for at least the next century. These are defined as asteroids that threaten to make dangerously close approaches to our planet.įor many years, the asteroid 99942 Apophis, with an 1100-feet diameter, about the size of the Empire State Building, sat at the top of most lists of the most threatening PHOs. Of these, they have identified a sub-category of Potentially Hazardous Objects (PHOs). Since the late '90s, the team has discovered over 25,000 NEOs. Its mission really began in 1998 when a mile-wide asteroid, 1997 XF11, was found to have a trajectory that could cause it to hit Earth in 2028. To be classified in this way, a space object also has to complete an orbit of the Sun in a period no longer than 200 years.ĬNEOS has now been discovering and tracking NEOs for around 23 years. NEOs are considered to be asteroids or comets that have orbits that bring them to within around 121 million miles of Earth. This asteroid will pass at a wider distance still, around 2.2 million miles.Īll these asteroids are classified by NASA as Near Earth Objects or NEOs. This asteroid is estimated to be as wide as 525 feet, that's just a touch smaller than the Washington Monument. On Friday, the asteroid 2021 QV6 will also skim Earth. This asteroid won't come as close to the Earth, however, passing within a distance of around 1.8 million miles. That's around 16 times as fast as a bullet fired by a rifle. On Tuesday, the smaller asteroid 2021 RX9, estimated to be as wide as the Pyramid of Giza is tall (128 feet), will shoot past our planet at a dizzying speed of 33,000 miles per hour. The asteroid 2021 NY1 won't be alone in paying Earth's vicinity a flying visit during the period of the Fall Equinox. Astronomers Want Volunteers to Help Spot Water-Rich 'Active' Asteroids.What to Know About 2021 PJ1, the Asteroid Speeding Past Earth at 20,600mph.Amateur Astronomer Films the Moment Jupiter Is Hit by a Space Rock.See Weird Dog Bone-shaped Asteroid Which Is Half the Length of Grand Canyon.
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