Technology Asteroid family is as old as the Solar System itself

16:01  07 august  2017
16:01  07 august  2017 Source:   Engadget

Incoming Asteroid To Be Used For A NASA Drill

  Incoming Asteroid To Be Used For A NASA Drill An asteroid is going to come close to Earth and NASA scientists will use it as a drill, testing whether they can prevent a real-life Armageddon.The space agency’s “network of observatories and scientists who work with planetary defense” are waiting for the small asteroid, dubbed 2012 TC4, to pass by Earth in what they expect will be a safe but close flyby, according to NASA’s Jet Propulsion Laboratory. The scientists don’t know exactly how near it will come on October 12, but it could be as close at 4,200 miles from Earth’s surface. The farthest estimate is 170,000 miles away — a much greater distance but still closer than the moon.

Researchers studying asteroid data (including infrared radiation from the WISE space telescope) have found an asteroid family that's over 4 billion years years old , and likely as old as the Solar System itself .

They're 1 billion years older than what scientists are used to.

  Asteroid family is as old as the Solar System itself © Provided by Engadget

To date, astronomers haven't seen asteroid families (that is, asteroids with a common source) in the Solar System older than about 3 billion years -- well after the star system came to be 4.5 billion years ago. However, they'll have to rethink their expectations. Researchers studying asteroid data (including infrared radiation from the WISE space telescope) have found an asteroid family that's over 4 billion years years old, and likely as old as the Solar System itself. The trick was to both rule out existing asteroid families and look for the telltale signs of a very, very old group of rocks.

Jupiter is so big it does not actually orbit the sun

  Jupiter is so big it does not actually orbit the sun <p>Because it's so dauntingly massive, Jupiter does not technically orbit the sun.</p>But each time I read it the book to her (sometimes three or more times a day), I furrow my nerdy brow at this line: "Of all the planets that circle the sun, giant Jupiter is the biggest one.

They've developed a drug-delivery system that uses nanoparticles to slowly supply small interfering RNA (siRNA) that stops the body's white blood cells from attacking the organ as a foreign presence. They're 1 billion years older than what scientists are used to.

That family is nearly as old as the solar system itself —over four billion years. The scientists now plan to use the same approach on other parts of the asteroid belt to dig even deeper into the early stages of our solar system .

As Gizmodo notes, the scientists used a process of elimination to focus their attention on the handful of asteroids that couldn't be linked to families, but shared similar albedos (reflection factor). It wasn't hard to tell that they were 'dark' asteroids whose primitive material composition and large size indicated they were born in the Solar System's early days, when huge collisions were par for the course.

The findings at once validate and challenge notions of what the early Solar System was like. They support the notion of a far larger asteroid belt with some of the larger planets (Jupiter, Saturn, Uranus and Neptune) closer to the Sun. However, they also raise questions: what does it mean that asteroids formed when the Solar System looked much different than it does now? And what can we learn about the very beginnings of our cosmic home? There's a lot more work to be done to get better answers, but this is an intriguing start.

Science

The Scientific Benefits Of Total Solar Eclipses .
Solar eclipses occur when the moon passes between the Earth and the sun so that it blocks part or all of the sunlight as viewed from a particular location on our planet. Earth is the only planet in the solar system where this can happen in this way. This is because of the moon’s size and its relative distance from the sun – when viewed from the Earth, it can identically cover the bright solar disc to reveal the tenuous, wispy outer atmosphere of the star (called the solar corona).An eclipse does not happen every time the moon travels around the Earth.

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