astronomer vs cosmologist. blvd. lightening.
whats the difference between an astronomer and a cosmologist?
Astronomers study objects and phenomena which exist or have their origin in outer space. The modern Astronomer uses research data to calculate the composition of galaxies, quasars, stars, and planets and to measure radio, infrared, gamma, and X-ray emissions from extraterrestrial sources. cosmology is a branch of astronomy. it is the study of the large-scale structure of the universe and is concerned with fundamental questions about its formation and evolution.
what makes a boulevard a boulevard?
a boulevard is usually a wide, multi-lane arterial thoroughfare, divided with a median down the center, and "roads" along each side designed as slow travel and parking lanes and for bicycle and pedestrian usage, often with an above-average quality of landscaping and scenery. The division into peripheral roads for local use and a central main thoroughfare for regional traffic is a principal feature of the boulevard. Larger and busier boulevards usually feature a median.
from how far away can lightning strike?
Almost all lightning will occur within 10 miles of its parent thunderstorm, but it CAN strike much farther than that. Lightning detection equipment has confirmed bolts striking almost 50 miles away, but these are very rare.