dr degrasse

Astronomy/Astrophysics Study Tips

So I noticed that Astronomy was one of the subjects in high demand on the @studyblrsubjects blog, I’ve decided to write a few study tips. One of my majors is astrophysics and I actually do pretty well in it (Alhamdulillah), so hopefully these tips will be good.

The set-up of astro courses at different universities vary quite a lot. Some are more practical, some deal a lot more with the theoretical and hard physics side, others are more balanced. If you’re interested in studying astronomy or astrophysics, it’s a good idea to contact the relevant department at your university of choice and find out what their programme is like.

1) Be careful with conversions. Astronomy uses its own units. Parsecs, Astronomical Units, solar masses, magnitudes, e.t.c. are defined in terms of what’s practically measurable when making observations. However, things like Kepler’s Law and Newtonian gravity and most formulae are defined in terms of your usual SI units. Learn how to convert correctly and check which units are the correct ones to use. It’s really useful to include the units when you’re substituting values into an equation so that you can use dimensional analysis to see if you’re missing a conversion. And don’t worry - everyone messes up a simple magnitude calculation every now and then I can rant about the awful magnitude system for ages.

2) Revise your trigonometry. Remember the Sine Rule and the Cosine Rule from high school? Me neither. Brush up on your trig because it is used all the time in astronomy. The last thing you want to do is incorrectly define a parsec because you can’t remember which sides correspond to sin and which correspond to tan. Be especially careful when converting between radians, degrees and hours. 

3) Use a compass. This is non-essential, but it’s useful to have one because you quite often need to draw a LOT of circles.

4) You don’t have to know constellations to study astrophysics. I can spot the Southern Cross (a.k.a. Crux) and Orion in the night sky. That’s about it, and I get As for astrophysics and astronomy. It’s pretty cool if you are able to spot constellations, and if you know where to look for interesting nebulae and star clusters, but it’s not essential. Also, if you want to bullshit your knowledge of constellations other people will believe you simply because you’re an astrophysics major.

5) When in doubt, the answer is probably spectroscopy.

6) Ask additional questions. Space is pretty cool. Whenever I get bored in class, I pay a little extra attention and ask questions on things that are vague. It gives you more insight into the unanswered questions in astrophysics (there are a LOT of unanswered questions) and into how astronomical research is conducted. Or you’ll learn some fun facts about space.

7) Set your wallpaper as a Hubble Space Telescope picture. Again, non-essential, but why wouldn’t you want to?

8) Like with any type of physics, diagrams are always useful.

9) Make sure that you can derive things on your own. Sure, some of the formulae you’ll be working with are based off empirical evidence or are beyond what you’re expected to know. However, there are plenty that come from the basics you learnt in physics and you should be able to derive those. 

10) Use the internet. Crash Course Astronomy (or even the show Cosmos) can help you familiarise yourself with the terminology and processes in astrophysics. Knowing the “story” behind processes will make it easier for you to concentrate on the actual physics behind the processes. For example, if you know that a black hole can form from the collapse of a dying star from listening to Dr Neil Degrasse Tyson explain it, you can concentrate on deriving the schwarzschild radius instead of trying to wrap your head around the idea of a black hole. Or, if you know that famous Carl Sagan quote about us all being made of starstuff, it’s easier for you to concentrate on understanding the different stages of star formation that leads to the creation of carbon.

I hope these tips are helpful. If you have any questions, feel free to send me a message or an ask! Happy studying.

xx Munira

I was ordered to stop drop and selfie by @coldtofire and @possit-de-tenebris I have learned that it’s best to just go along when these ladies ask something of you so here you go. Taken as I was waiting for Dr Neil Degrasse Tyson to hit the stage!

But I’m not going down alone. Taking a few of you with me… Come on and join the party @stillsuchagoodgrrl @lettingthewaterholdmedown @hemakesmesmilehuge @redmachasacorn  @elementaldarkness @missbrattlings @tayx2 @bunnibunnichan @complexmindsimpleheart @constant-reject @dutchessdemented @beau-ootifulsoup @lorin-irena @missselfdestruct 

Anyone else want to ride this train? Hop on board and let me know!

anonymous asked:

Hey, question are you gonna comment or out thoughts on that post that's been reblogged recently on gene Roddenberry? Talking about how (truthfully) sexist he was? Because I feel like TOS fans should really acknowledge all of that problematic stuff (while still pointing out why it doesn't matter in relation to the sexist reboot) - I guess I just wanted to see if you had any opinion on the dif. on how TOS was presented, and the intent behind it

Oh, absolutely.  In fact, I’m planning a long text post on the matter.  Work has just been crazy lately so I’m hoping to comment this weekend.  I don’t deny that Gene Roddenberry was an imperfect human being.  He definitely displayed sexism and the man cheated on his wife after all.  There is a danger in holding someone up on a pedestal – they’re only human and thus have faults and failings like everyone else.

To give you another example, I absolutely adore Carl Sagan’s Cosmos and I share Dr. Neil deGrasse Tyson’s admiration for everything he achieved.  However…I also have a friend in his mid-40s who was an undergraduate at Cornell University when Dr. Sagan taught physics there.  This friend told me that he had Carl Sagan as an instructor – and that the man was a terrible teacher, arrogant, and completely bought into his own celebrity.  I can’t tell you how disappointed I was to hear this.  That being said, Cosmos was and is a great and truly wonderful achievement and I still love and adore it and think it is a wonderful example of how we need to push the promotion of science for the public good.

I feel much the same way about Star Trek.  It was a product of its time made by imperfect but idealistic human beings.  Is there sexism and racism in the show?  Absolutely.  But to ignore the historical context is to do a true disservice to Trek and everyone who was associated with it.  The writers and cast had to claw and fight for so much.  They truly pushed the envelope and took risks.  And the show should be recognized for that.

At the same time, we shouldn’t pretend that there weren’t/aren’t problematic elements to a show made in the 1960s both onscreen and (especially) behind the scenes.

But, for a show made in the 1960s. TOS is a stunning achievement.  I don’t think we should refrain from criticizing it, but we also have to consider from where that criticism stems.  Wanting to draw attention to TOS’s problematic elements is fair.  But using its problematic elements to defend Abrams, Orci, Kurtzman, and Lindelof from criticism would be wrong-headed, in my opinion.  Context matters, and to compare movies made in 2009 and 2013 to a TV show made in the 1960s without acknowledgement of this is disingenuous.

1/24/17


Good morning.

One week ago today I had the privilege of attending a lecture by Dr. Neil deGrasse Tyson. Inspiring, funny and incredibly motivating, he gave the entire lecture in his socks. As he shuffled around the stage he asked questions and even called on people in a Q & A at the end. (Incredible because Jones Hall was sold out for this) He spoke to the crowd of thousands as though we were all his students and were in a tiny classroom. It was brilliant to say the least. My favorite question was asked by an aspiring astrophysicist. She just wanted to know what advice he could give her about college. He said: “Take harder classes and stop thinking about your GPA.”

I loved that. Thank you, Dr. Tyson

Happy Tuesday❤️

*first reaction to finding out that the next Splatfest is Art vs Science*

Originally posted by thmsbgrdt

Erasing ENFJ Stereotypes

Submitted by: foreveranevilregal

Because we are not all Chris Traeger.

ENFJs are busybodies.

This one can depend on the particular ENFJ, but as a whole, it isn’t true. Yes, we enjoy helping people and we’ll check up on them, but we don’t want to know personal information for its own sake. If we ask you about a problem, we’ll be thinking about a way we can help you with it, even if we don’t verbalize it. We’re very capable of respecting your privacy and backing off if we sense you are uncomfortable.

ENFJs are not never logical or analytical.

    This stereotype is my least favorite. ENFJs are able to analyze logically and come to perfectly rational conclusions. Just because we are Fe dominants doesn’t mean that our Ti lies dormant. Some ENFJs have very well developed Ti. Dr. Neil deGrasse Tyson is a great example, as an ENFJ scientist. Yes, generally we tend to be more emotional, but we can step back when the time comes for rationality and analyze without letting our feelings get in the way.

    ENFJs are always bubbly and sunshine personified.

      False. It’s true that we generally try to be pleasant, but we are still human. No one is happy all the time, and that includes ENFJs. A lot of the time we can hide our negativity better than most so as not to bring others down with us, but we are just as capable as any other type of becoming angry, sad, depressed, etc. And an ENFJ who’s upset is a force to be reckoned with thanks to dominant Fe.

      ENFJs are naïve.

        No. Just no. We can see the world around us, and it’s not through rose colored glasses. The difference is that we hope that we can make a difference and change it instead of just passively accepting it.

        ENFJs need to be around people all the time.

          This stereotype is a huge reason why I thought I had mistyped for over a year. Our dominant Fe is incredibly extroverted, but our auxiliary Ni is just as introverted. In order to be healthy, ENFJs need to take some time to themselves to daydream and process things internally. The amount of alone time needed varies, but it’s very important that we take time alone, especially after emotionally charged situations, in order to separate from others.

          ENFJs can do it all and have everything under control.

            I’m not sure where this particular stereotype came from, but it is definitely untrue. It’s flattering to think that others consider us superhuman, but we’re not. We may be overachievers and try to do everything, but that doesn’t mean we succeed. ENFJs are only human and although we’re highly motivated, we can slip up just like anyone else. In fact, we often burn out because we feel like we have to do everything.

            ENFJs are all very outgoing and have great social skills.

              Sociability and cognitive orientation, though fairly correlated, are not 100% correlated. Extroverts can be shy, just as introverts can be outgoing. Generally ENFJs will tend to be more outgoing, because Fe will direct us to put others at ease, even when it means sacrificing our own personal comfort, but there are also shy ENFJs, such as myself. And though we tend to be better at reading a room than most types, that doesn’t always translate into perfectly smooth socialization.

              youtube

              A VIDEO THAT WILL OPEN YOUR MIND IN UNDER 4 MINUTES

              Astrophysicist Dr. Neil DeGrasse Tyson was asked by a reader of TIME magazine, “What is the most astounding fact you can share with us about the Universe?” This is his answer.

              anonymous asked:

              whoa, why are you about to be in the same building as neil degrasse tyson?? I'm so jealous! :o

              Last night I was at An Evening with Neil deGrasse Tyson for a talk called The Cosmic Perspective, and it was incredible and I am so amped about space and technology and LIFE it was everything I ever dreamed

              SOME HIGHLIGHTS

              • “So these aliens, they come to earth to steal the ocean because they need hydrogen. And I- I can’t- DO YOU KNOW HOW MUCH HYDROGEN THEY HAD TO DRIVE PAST JUST TO GET HERE?”
              • So much salt about Pluto, “the cosmic object” 
              • “SiO2 is the active ingredient in… rocks”
              • “Canada, you’re on the periodic table, you discovered radon.” *cheering* “Yes, you discovered a gas that is radioactive and gives you cancer. Well done.”
              • Dr. Neil deGrasse Tyson, renowned astrophysicist, cosmologist, director of the Hayden Planetarium and host of Cosmos: A Spacetime Odyssey cannot figure out how to create exponents in Microsoft Powerpoint
              • “Get your UK class segregation OUT of my PERIODIC TABLE”
              • “We’re the country that put a man on the moon and yet we still have people building elevators who are AFRAID OF THE NUMBER THIRTEEN”
              • “Speaking of elevators, what comes below 1? B? SB? G? L? You do realize, we already have a numeric system for things below zero.” *yelling* THEY’RE CALLED NEGATIVE NUMBERS
              • An interpretive dance of Gravitational Waves
              • “The Superbowl is the last gasp of Roman numerals. And they only use them because they’re manly.” *begins stomping around* “We’re FOOTBALL PLAYERS, we are MANLY MEN, we PLAY SPORTS and COUNT WITH LETTERS”
              • This “important current events” slide
              • Everything else. Literally everything it was amazing
              youtube

              The Martian was one of the biggest hits of 2015, and was nominated for tons of year-end awards. But being as it’s set in space and in the near future, we thought it best to bring back Dr. Neil deGrasse Tyson to help us separate this movie’s sins from its wins. Please thank him by checking out his StarTalkRadio YouTube channel HERE

              youtube

              In order to truly dissect the sins of such a massive science fiction film like Interstellar, we once again turned to the smartest astrophysicist we know, Dr. Neil deGrasse Tyson, for assistance. Please check out Neil’s StarTalkRadio channel for more awesomeness: http://www.youtube.com/user/startalkradio

              youtube

              Astrophysicist Dr. Neil DeGrasse Tyson was asked by a reader of TIME magazine, “What is the most astounding fact you can share with us about the Universe?” This is his answer.

              So either Dr. Neil DeGrasse Tyson is a Nerdfighter, or he has met a lot of Nerdfighters, because he immediately knew what to do when I told him I was one.

              And if you have never seen him speak, I highly encourage it. Best keynote speech I have ever attended.