heavy stuff

the shape of space-time  might be gravity
dictating what coheres and how fruit falls
constraining planets that might wander free
to plot their petty pace within strait walls
no mediating particle's been seen
'though there's a boson to explain the field
we're pumping $billions into a machine
to search for what  might not even be real
Dark Energy may prove the sternest test
to fit in Albert Einstein's brilliant scheme
each galaxy in flight from all the rest
means all's not quite as simple as we'd deem
Inflation posits masses that repel
until they settle in this weighty well