1st verify there is a Java installation:
1.Click Start
2.Select Control Panel
3.Click the Add/Remove Programs control panel icon
4 See if there is a Java or JavaFX listing in the control panel icons.
If there is:
check
http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2012 DA14&orb=1
to see if you see an orbit diagram for the asteroid, "2012 DA14", which is supposed to make a close encounter with Earth, Feb. 15th.
If all you see is a chart, and no eliptical orbital cartoon picture, that will verify Java is not working, at least.
Also, make sure you are not using the "No Addons" version of Internet Explorer.
{Acutally, that link didn't paste right: just go to http://www.spaceweather.com/ and near the bottom of the page, click on one of the blue links for any of the "Recent & Upcoming Earth-asteroid encounters:"} to see if all that shows up is a text chart (Java not working), or the actual "orbital diagram" (Java working).