It’s International Asteroid Day – not “Happy” more like “Pensive” #space #asteroid #NASA#asteroid

Map of 20 years of small asteroid strikes

Frequency of small asteroids roughly 1 to 20 meters in diameter impacting Earth’s atmosphere, over 20 years. Bigger the dot, more reports. These mostly bur up in the atmosphere.

Commemorate the Earth’s largest recorded asteroid impact today, International Asteroid Day.

In 1908, a powerful asteroid struck the Podkamennaya Tunguska River in a remote Siberian forest of Russia. The event leveled trees and destroyed forests across 770 square miles, which is equal to the size of three-quarters of the US state of Rhode Island. The impact threw people to the ground in a town 40 miles away.
The first step is to detect and track Near-Earth Objects that might, some orbit, hit us. NASA will be looking for asteroids as small as 50 meters across, but if we find one, what will we do? Suppose NASA tells us something like, there’s a 40% chance that a given rock will impact the Earth in 75 years? If we get over 10 years warning, maybe that’s enough time to get our act together.
The chance of a major impact is small, but the consequences are huge, so how much should we spend? Maybe we won’t do much of anything for a long time. We accept low frequency/high consequence risks all the time. Ask anyone living on a major earthquake fault or at the base of a volcano. Taking the risk usually pays off. But a really big impact risks more than one island or coastline. It’s hard for us to come together by the millions to address such a thing, but maybe that’s what visionaries are for. Remember the dinosaurs.

No Challenge to the #Moon

A moon that we see once a yearOrbits_of_Cruithne_and_Earth,
A rock in Near Earth Orbit,
Swings past Venus, out to Mars,
Approaching, but it won’t hit.
An asteroid that loops the Sun,
No poets rhyme, no singers croon.
To pass nearby but once a year
Makes no rival to The Moon.
Fancy calls this a moon,
Passing each November.
Named for folk of County Down
And Antrim to remember.
Not many Irish are ensconced
In cosmic objects dim or bright.
But so you are, my neighbor rock,
A name that I can’t say right
Who’s seen ya –
Tied to the Sun, no earthly guest.
Few dream a’
The painted people of the west.

While claiming Cruithne is a second moon seems a stretch, it is an interesting object. At half the size of the asteroid that killed off the last non-avian dinosaurs, it would be an existential disaster if it struck us. But don’t worry – it’s not going to impact Earth. Despite its benign orbit, you’d think the dooms dayers would have latched onto it by now. Maybe it’s that tough Gallic name that saves Cruithne from infamy.

“Variations of the name include Cruthen, Crutheni, Cruthin, Cruthini, Cruthne, Cruthni, Cruithni and Cruithini. This is the Gaelic version of the Brittonic term *pritenī, both derived from an earlier Insular Celtic form *kʷritenī, which is taken to mean ‘painted/tattooed people'” wikipedia