Secondary research is often dismissed as unreliable and even too easy-to-do to be a job. I think it's time I get to say my opinion on these issues.
The short answer to both points (unreliable, too easy-to-do) is
Depends x 2.
The long version is a short story :)
Adventure Inc.Mr. Adventure has a vision and assembles his team to share this vision.
"My dear friends, I have some great news. Adventure Inc. will be the first company selling land on the sun and all of you will contribute to this great endeavor! We'll move faster than our competition and, I'm sure you already know, at the moment no one is planning on getting there."
"Sir, I'm in.", Mr. Yes says. "Sir, we can do it. I'm sure we're going to beat the competition!"
"Yes, you're a great team-player. Thank you.", Adventure says. "Are there any questions or comments? We have to start working on this project."
"Mr. Adventure, has anyone come back from the sun yet?", Mr. Curious asked.
"Come back?", Adventure's puzzled, "what do you mean? No, of course not. We'll be the first setting foot on the sun! Curious, are you having doubts?"
"No sir," Curious said, "just questions."
"Like what?"
"Well, how big is it?"
"Silly question, Curious. It's huge, our greatest opportunity ever. We'll see how big exactly when we get there."
"Ok, sir. But..."
"Curious, you're going to have to meet with Yes and discuss all your questions."
"Sir, I'll be glad to do it", said Yes.
"Great. Let's get to work everyone! Adventure Inc, and yours truly - Mr. Adventure, will recognize all of your hard work! Yes, schedule the meeting with Curious."
"Sir, I'll meet with him on Monday!"
"Great!"
"Ahm...Sir?", Yes mumbled.
"What is it Yes?"
"Sir, just how hot is the Sun?"
key learning
To measure a star's temperature one can go there with a thermometer or can... well... estimate it by looking at it with an expensive tool (i.e. telescope). These are both pretty much primary research tools. However, when time and budgets are scarce one can always use Wikipedia - other people's experience and data.
To see just how hot the sun is
click here or... go there :)
source: wikipediaLabels: ideas