Register for an account


Enter your name and email address below.

Your email address is used to log in and will not be shared or sold. Read our privacy policy.


Website access code

Enter your access code into the form field below.

If you are a Zinio, Nook, Kindle, Apple, or Google Play subscriber, you can enter your website access code to gain subscriber access. Your website access code is located in the upper right corner of the Table of Contents page of your digital edition.

The Sciences

Steve Ostro, 1946 - 2008


Sign up for our email newsletter for the latest science news

I just found out that astronomer Steve Ostro has died. I didn't know him personally, but many of my friends did. He was an asteroid specialist, and he was specifically interested in near-Earth and potentially hazardous asteroids. He was especially important in the field of active radar mapping of asteroids: using the giant Arecibo radio telescope to send pulses of energy at asteroids and using the timing of the reflections to make 3D maps, similar to how dolphins and bats echolocate. I've used many of his maps in my talks, including the dog-bone shaped Kleopatra (to show that not all asteroids look like spuds). This is a great loss to astronomy and to science. Emily has more here, and there are other obituaries here and here, and details of his contributions to asteroid science are on Wikipedia.

    2 Free Articles Left

    Want it all? Get unlimited access when you subscribe.


    Already a subscriber? Register or Log In

    Want unlimited access?

    Subscribe today and save 75%


    Already a subscriber? Register or Log In