This topic contains a solution. Click here to go to the answer
|
Author Question: Some galaxies in the Local Group stopped forming stars for several billion years but then started ... (Read 17 times) |
Did you know?
Women are 50% to 75% more likely than men to experience an adverse drug reaction.
Did you know?
Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.
Did you know?
Excessive alcohol use costs the country approximately $235 billion every year.
Did you know?
Patients who have been on total parenteral nutrition for more than a few days may need to have foods gradually reintroduced to give the digestive tract time to start working again.
Did you know?
Parkinson's disease is both chronic and progressive. This means that it persists over a long period of time and that its symptoms grow worse over time.