Answer:
Protostars are difficult to observe because they are surrounded by cocoons of gas and dust.
Answer:
PRNewswire-USNewswire/ -- Following is the daily "Profile America" ... Today, over 85 percent of the nation's households have a washing machine. ... people, places and economy, from the American Community Survey, ... First fully automatic machine/accessed 7/22/2016: ... Strictly Necessary Cookies.
Explanation:
Seven
red, orange, yellow, green, blue, indigo, and violet