Geo Visitors Map

  Beauty & mystery in science.

This red supergiant star [V838] monocerotis is located about 20,000 light-years from Earth. A burst of light in a huge dust cloud caused light echos that were seen for three years. Credit: NASA, ESA and H.E. Bond [STScI].

  Science tidbit

NIST atomic clock.
What is an Atomic Clock?

The watches we wear on our wrists or the clocks we put on our walls are not atomic clocks. There are not all that many true atomic clocks - and they tend to be rather large and expensive. So, unless it looks something like the picture alongside from the National Institute for Standards and Technology [NIST], it is not a state-of-the-art atomic clock.

Learn about an atomic clock.

Delivery Addresses

We ship to most places, including AFO/APO addresses. The map shows some of the places that we have shipped to recently.

Where multiple shippers are available, the customer chooses the delivery service. Approximate shipping costs are shown prior to the completion of payment.