NASA’s Parker Solar Probe has sent signal to home

NASA's Parker Solar Probe is out of contact with mission control after its closest-ever pass of the sun on Tuesday, Dec. 24.
The mission’s close-up with the sun is the culmination of a dream that dates to the dawn of the space age, but progress was ...
Remember that colorful plastic ring that swept through playgrounds and living rooms in the 1950s? The humble hula hoop might ...