Get Ready For A Close Encounter With A Massive Asteroid!

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Massive asteroid to zip past Earth on September 1 (Photo Credit NASA)

Earlier this month, millions of Americans were treated to a rare spectacle: a total solar eclipse that was visible from coast-to-coast. While Florence, a massive asteroid that will zip past our planet on September 1, will not overshadow the stunning event, it will make history of its own. According to Paul Chodas at the Center for Near Earth Object (NEO) Studies, the space rock is the largest to pass this close to our planet since the first near-Earth asteroid was discovered over a century ago.

Though many small NEOs enter our atmosphere harmlessly on a regular basis, the average size of comets or asteroids whose orbits have come into proximity with Earth is about 460 feet (140 meters) In comparison, the Spitzer Space Telescope estimates Florence is an impressive 2.7 miles (4,345 meters) across, or about a third of the size of the asteroid believed to have caused dinosaurs to become extinct.

Simulation of Florence’s flyby on September 1 (Image Credit:

Luckily, according to NASA experts, the closest Florence will get is about 4.4 million miles, or approximately 18 times the distance between the Earth and the moon. While that is far enough to rule out a possible collision, it is close enough to view with binoculars and telescopes from late August to early September. More importantly, Florence’s proximity will give scientists the rare opportunity to observe the asteroid in detail. Studying this largely unaltered rock debris, from when the solar system was created about 4.6 billion years ago, will give researchers some insights into the formation process of Earth and other planets.

Discovered in March 1981 by American astronomer Schelte “Bobby” Bus at Australia’s Siding Spring Observatory, Florence was named after Florence Nightingale, the founder of modern nursing. The asteroid hasn’t been this close to Earth since 1890, and won’t approach us again until 2500.

Image Credit:

Though most NEO’s aren’t nearly as large as the visiting behemoth, they’re not a rare occurrence. In 2016, more than 15,000 asteroids were classified as near-earth objects, and about 1,500 previously unknown ones are discovered each year. Though this might sound concerning, even those that get significantly close to our planet don’t necessarily pose a risk. In March of this year, an asteroid the size of a bus caught experts by complete surprise when it soared within 202,000 miles of Earth — nearer than the distance between the Earth and the moon. Fortunately, it had no intention of landing on our planet.


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  1. What did millions of Americans enjoy earlier this month?
  2. Why is Florence going to make history?

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Why is it important for scientists to keep track of all the NEO’s...

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Though this might sound concerning, even those that get significantly closer to our planet don’t necessarily pose a risk.

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  • PromyseMonday, September 25, 2017 at 8:58 am
    Why was there more than 15,000 asteroids there.
    • schneck123456
      schneck123456Monday, September 25, 2017 at 10:43 am
      there called stars
    • magicspace301
      magicspace301Sunday, September 24, 2017 at 6:05 pm
      oaahhhh I missed it dang it
      • rebeSunday, September 24, 2017 at 11:54 am
        • poptartFriday, September 22, 2017 at 9:53 am
          • broThursday, September 21, 2017 at 5:06 pm
            I like space
            • Kool3rThursday, September 21, 2017 at 3:22 pm
              Oi This is very cool
              • ?Wednesday, September 20, 2017 at 5:42 pm
                • WEREWednesday, September 20, 2017 at 12:06 pm
                  Were gonna die
                  • coolWednesday, September 20, 2017 at 8:35 am
                    • thegameingant
                      thegameingantWednesday, September 20, 2017 at 6:45 am
                      cool i wonne woder if alians live on the rock