Some passes of the visible from the UK overnight - I'll tweet/toot warnings closer to the time

Current source of frustration:
1 - 0.9 - 0.1 = -2.7755575615628914e-17

Useless factoid of the day:

There is an asteroid named after Alexandria Ocasio-Cortez (happened when she was still in high school).

ssd.jpl.nasa.gov/sbdb.cgi?sstr

New entry!
Brazilian Primes Which Are Also Sophie Germain Primes
Article by Jon Grantham and Hester Graves
In collections: Attention-grabbing titles, Easily explained, Fun maths facts, Integerology
We disprove a conjecture of Schott that no Brazilian primes are Sophie Germain primes. We enumerate all...
URL: arxiv.org/abs/1903.04577v1
PDF: arxiv.org/pdf/1903.04577v1

you know you’ve been doing too much complex analysis & too little living in the real world when you read “homophobic” as “holomorphic”

Q: Why can't you use 'Beefstew' as a password? A: Because it's not strogonoff.

In about half an hour, UK pass, starting at 04:44:11, duration 168 secs, bright, Magnitude -2.9

Suppose someone sends an email, and has several addresses in the BCC field. How serious is the breach if the email server includes those addresses in an X-* field in the email header?

Some passes of the visible from the UK overnight - I'll tweet/toot warnings closer to the time

Going beyond the Golden Ratio - this post will repay several visits. It looks gentle, reads well, and goes way beyond anything I've seen before on this topic while remaining readable:

extremelearning.com.au/going-b

Increasing numbers of spam accounts signing up for mathstodon.xyz, which I'm just about keeping on top of.
If anyone has the time to implement an "admin must approve signup" feature as suggested in github.com/tootsuite/mastodon/, I'd be very grateful.

Q: Why is television called a medium? A: Because it's neither rare nor well done.

In about half an hour, UK pass, starting at 05:33:02, duration 272 secs, bright, Magnitude -2.4

In about half an hour, UK pass, starting at 04:00:18, duration 98 secs, bright, Magnitude -2.0

Some passes of the visible from the UK overnight - I'll tweet/toot warnings closer to the time

*Assistant:* Boat 81, come in, your time is up. *Me:* We only have 50 boats. ... (pause) ... *Assistant:* Boat 18, are you in trouble?

In about half an hour, UK pass, starting at 04:49:13, duration 215 secs, exceptionally bright, Magnitude -3.5

In about half an hour, UK pass, starting at 03:16:29, duration 1 secs, visible, Magnitude -0.5

@wendyg Hello Wendy! Welcome to Mastodon. As you can see, I'm on a different instance, one that concentrates more on math, but I've followed you, and look forward to seeing what you choose to share.

Cheers!

This week I said to my students "how many digits do you use to approximate non-exact square root?" Almost everyone said 2. Why? They did not know. My opinion it's because math teachers repeadely told them
*without any reason*...

A Mastodon instance for maths people. The kind of people who make $\pi z^2 \times a$ jokes.
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