Conflicting distance measurements have added to the uncertainty. One data source places one object at 6,500 light years away, ...

Residents of several suburban communities reported seeing several objects streaking across the night sky, leaving a trail of flames in their wake.

If something seems very heavy for its size (like a heavy metal object), we say it is more dense. If something seems light for its size (like a bag of cotton or pumice rock), then we say it has low ...

You can use grams to measure the weight of light objects and kilograms to measure the weight of heavy objects. 1 kilogram (1kg) = 1000 grams (1000g) Let's have a look at how you might measure some ...