Dad, physics teacher, musician, and sailor. Originally from the subtropics now living in the New England Tropics.
Can you call it an observation if the lens you are using may be faulty?
If you use many lenses you can assure yourself that they are not all faulty in the same way. This is why we can safely say that dark matter is observed fact, because we observe it in so many different ways.
The mass is definitely detectable–it’s just not visible. And it’s detectable in several different ways that all match, that’s the key here. This is definitely an observation.
I think it CAN be harmful to some dogs though!
It’s an interesting idea, but it assumes that physical forces are getting WEAKER over time, and that’s a pretty big assumption. It’s not very parsimonious.
By being a life-long learner! Seriously, learning is an active thing, it’s not something we have to be sitting in a room to receive. So as we read and learn more, we realize that some of the things we learned are different from what we thought. It’s something we should all be doing as we learn and reflect.
You wouldn’t call a person a dwarf, period. So don’t do that. If you ever meet a little person, they’ll probably refer to themselves as a little person. You should just follow their lead
A dwarf planet is not a category of planets. It is a category of sub-planetary objects. This is how the term “dwarf planet” was adopted by the IAU in 2006. It did used to mean “type of planet”, but there are just too many of them, and they’re really too different from planets, so it literally does not mean that anymore. At least to astronomers.
I think you’re getting confused with dark energy. There is very little debate about dark matter–it’s an observation that many many many people have made.
Dark energy is the name for whatever is causing the explanation expansion rate of the universe to increase. There’s quite a bit of debate about whether the expansion rate even IS increasing. And the amount of increase is different according to how you try to observe it. So yeah, there’s a lot of debate about whether dark energy is actually a thing, but there is very little debate on whether there’s more matter than we’re able to observe, something that we call dark matter but which we don’t really understand. Similar names, but totally different concepts!
Some classics:
All three of those things have been thoroughly debunked, and are demonstrably false, and yet we teach them all the time. Sometimes it’s even SCIENCE TEACHERS that are repeating these things, and sometimes it’s right in the textbook!
An even better idea: make your OWN list! Don’t expect someone else to tell you the truth if you’re not working to search for it yourself!
I teach kids how to do physics, and how to write about doing physics.
Pepperoni and pineapple pizza. The sweet and tangy go sooooo well together!
8:30-3:00 baby, though honestly 3:45 or 4:00 would be better. I get 40 minutes for lunch and 90 minutes alone without students. I’ve got it nice.
I’m not seeing the most basic bit of advice in my brief perusal, but even so it needs repeating: find a camping buddy. That is by far the easiest way to get into camping. And honestly you shouldn’t be going out on your own as a novice anyway.
Ask the people you know, or the people THEY know. If that doesn’t work then try local camping groups near you. Lots of people are looking for others to go camping with, so you’re a commodity! Get together with them before your first trip to go over packing lists and menus, and maybe even go grocery shopping together before hand. I really didn’t recommend going out there in your own, buying everything you need, etc etc. Start with someone else, see if you’re into it, and next steps will be obvious. You were born to live out there, it comes pretty naturally no matter how many thousands of years your people have been in the city–you were out there much much longer!
I first used Linux in the late 90s, and it was just something that worked better on an older box. I installed Red Hat on an old 286 and the fun part was honestly getting it to work and learning about computers. Then one day I realized that I was spending all my free time working inside on this thing, but I was living on the water, in the Florida Keys, with access to boats and jet skis and pretty much anything. That had been my dream my whole life and all of a sudden I was living it. And I didn’t even have to be at work, right next door, until 10am. I was on a break from school then, and that’s actually what caused me to change my major from CS. I didn’t think it would be helpful to spend my whole life indoors!
Now I’m a physics teacher and I sometimes teach my 9th graders how to use Python for simple things like graphing. I love my life and I’m really thankful I keot computers as a hobby rather than as my profession.