How hot was the cosmic microwave background? Do gravitational waves travel at the speed of light? How do we understand cosmological redshift?

How hot was the cosmic microwave background? Do gravitational waves travel at the speed of light? How do we understand cosmological redshift?
What’s Brewing? Science! How about InSight mission, global warming, and the expansion of the universe? @PaulMattSutter will discuss all this topics at #365DaysOfAstro
Where is the Oort Cloud and what is it made of? Why do we think some comets from there? If the Oort Cloud exists, how did it form?
A special episode wherein @PaulMattSutter rant about the nature of science and the responsibilities scientists have when communicating with the public. It’s a treat at #365DaysOfAstro
What makes time so hard to understand? Why is it so different from the spatial dimensions? Is time in any way connected to that most difficult of concepts, entropy?
It’s time to say goodbye to Kepler. It’s the end of a great adventure to discover exoplanet. Goodnight, Sweet Prince. With @PaulMattSutter at #365DaysOfAstro
How much energy is needed to blow up the sun? How is this connected to the idea of binding energy? Where is all the energy in the universe?