225E-237-Lost

225E-237-Lost

The asteroid named for Mildred Shapley Matthews was lost in the solar system for 75 years.
In 1916 the 60 inch Hale telescope on Mt. Wilson, California was the largest telescope in the world.
Seth Nicholson and Harlow Shapley used it to discover a 2 mile diameter asteroid. They only observed their new asteroid twice on their discovery night. Shapley named the asteroid Mildred for his one year old daughter. Nicholson and Shapley were able to find asteroid Mildred a couple of times during the month after it's discovery. After that it's 1324 day orbit around the Sun was so poorly defined that astronomers did not know where to point their telescopes to observe it and Mildred was declared "lost". Friends of Mildred Shapley Matthews would always ask her if she was found yet. In fact it was not until she was 76 years old that Dr. Gareth Williams rediscovered "lost" asteroid Mildred. After 3/4 of a century of being lost Mildred was found.

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406E-447-Nuking An Asteroid

406E-447-Nuking An Asteroid

Tonight, even though the chances are extremely slim, an asteroid hunter could find a sizable asteroid on a collision course with planet Earth. If we have decades warning, the potential impactor's arri...

15 Syys 2min

916-Past Glory

916-Past Glory

When accurately recorded historical observations do not agree with what we what we see today it is often very rewarding to find out why. In modern telescopes we see Theta Eridani to a be pair separate...

11 Syys 2min

405E-446-Asteroid Homestead

405E-446-Asteroid Homestead

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915-Raining Comets

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4 Syys 2min

404E-445-Not So Secret

404E-445-Not So Secret

A partnership of humans and computers will help to minimize the damage when asteroid hunters find a space rock with our number on it.

1 Syys 2min

914-Deep Synoptic Array

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28 Elo 2min

403E-444-Near Comets

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25 Elo 2min

913-Moon Impact

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Bill Gray is an astronomer who specializes in tracking objects in space which come near the Earth. In addition to natural objects like asteroids and comets Bill also tracks rocket boosters and space j...

21 Elo 2min

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