Tag Archives: moon

Luke and the Moon

During the last few months my 6 years old son, Luke, and me have been taking photos of the Moon using my telescope (a Skywatcher Black Diamond 80, f=600mm) and my CANON 5D Mark III camera. We are trying to get all phases of a full lunation of the Moon compiled in ~28 images.

I’ve been compiling some of those images in a Twitter thread, let me include here some of these images:

I hope that we can show you the result of this work soon! I’m so happy Luke is showing that enthusiasm taking the photos and helping me to combine the data. That seems a very nice project for kids!

SciComm experiment: #SuperBlueBloodMoon vs #LunarEclipse

As I expected the news about the Lunar Eclipse happening on the 31st of January 2018 was in the media and social media all around the world… even though in many countries (Europe, South America) the Lunar Eclipse was not visible.

In my humble opinion, many of the articles in general outlets and media were not very well written and actually very hype, which created that people were actually confused about what was happening.

Of course, I complained a lot about how the news were presented in the media. I’m a huge defender of inviting people to look at the sky (I’m continuously doing it!) but not exaggerating what people should expect to see. In this sense I’m an “old-schooler” as I really consider facts and naming things properly are important.

After having some discussions with friends in social media about all of this, I decided to create a poll in Twitter to explore this more (thanks @DarkSapiens and @vrruiz).

Furthermore, following the “noise” in Twitter, I had the feeling that young people care less about the actual name of the phenomenon than older people. That is, young people didn’t dislike naming the event as a Super Blue Blood Moon.

And that was the beginning. As a scientist I wanted to test if my hypothesis was right.

Hypothesis: At least in Twitter, as I see in my timeline, young astronomers/science communicators seem to prefer or at least are less molest with the term #SuperBlueBloodMoon than old astronomers/science communicators.

Experiment in Tweet: I’m testing an hypothesis. Could you please choose your age range (=older or younger than 33) and if you like/dislike or prefer ? I’ll use this to write a post about using hype in astro news. Thanks and please share.

Below is the screenshot with the question and the results. Huge thanks to the 580 people who contributed in this poll (11% of my followers).

The conclusions that we can get from these results, that as I’ve said apply for my vision in Twitter, which is biased for the people who I follow or follow me, are the following.

First, the majority of my followers/people who answered this question are older than 32 years (60%). Fair enough.

Second, combined, only 19% of the answers agree with “I like SBBM”. I’m happy about this. And this was actually expected, because there should be a huge bias in the people that follow me in Twitter.

But the interesting thing for me is that, attending to these results, younger people like SBBM more than older people. The ratio between YES/NO is 25% for <33 years and only 15% for >=33 years.

Without any additional statistical analysis including uncertainties, this result seems to support my hypothesis and the reason of this experiment: young astronomers/science communicators seem to prefer or at least are less molest with the term #SuperBlueBloodMoon than old astronomers/science communicators.

But I also asked two extra questions.

Question 1: Also, should Media/Astronomers use SBBM= instead of LE= to publicise the event and reach a wider audience? Thanks!

The results here are also interesting. 3 people in 5 agree that using SBBM is hype (yes!). I was expecting this answer would have been around 2/3, but it is still a good proportion.

In any case, I also got some feedback about this:

27% of the answers (a bit more than 1 in 4 people) support using SBBM in the title of the news as long as the facts are explained in the text (which was rarely the case).

Very few people (7%) support using SBBM to attract people. And attending to the results provided by the experiment above, the majority of the answers are coming from young astronomers, as example my AAO colleague and friend Becky Brown:

My conclusion here: although some people think than using SBBM is a good thing to attract people to the news or observing the sky (but see next question), the majority of the people consider that SBBM is hype and should not be used, unless the facts are well explained in the text of the news.

Question 2: What do you consider is the most important consequence of using instead of for publicising the event?

Well, here 61% of the answers agree that “it is not that good to do that” as science/pseudoscience mix and people were confused. And indeed people were confused! During the last week I’ve been giving some virtual talks in Spain with students, and I received the question “what was the SBBM?”. They didn’t know it was a lunar eclipse, and they show some connections with astrology (!!!).

A couple of extra examples in the UK and Australia were provided as comments by two astrophysicists:

Still, 27% (more than 1 in 4) of the answers agree on using SBBM for getting the extra attention by Media (I assume that considering facts are explained, something that didn’t happen very often).

Only 12% of the answers agree that using SBBM instead of Lunar Eclipse encourage people to look the sky.

My conclusion to this question: although it might help to encourage people to look at the sky and for sure will attract the attention of the media, we should refrain to use SBBM as it confuses people at the same time that mixes science and pseudoscience.

What are your thoughts?

The “Super Blood Blue Moon” is just a lunar eclipse

In the last few days I’ve already answered some few emails and questions in social media about the Super Blood Blue Moon happening on the night from 31st January to 1st February 2018. What is this? Is this really important?

Short answer: No, it is not! This is just a lunar eclipse. The rest is hype to sell the story.

Visions of a Total Lunar Eclipse within clouds - 8 October 2014 - Sydney

Visions of a Total Lunar Eclipse within clouds – 8 October 2014 – Sydney. More information and high resolution images in my Flickr. Credit: Ángel R. López-Sánchez.

Long answer: Let me use an email I wrote yesterday replying the questions asked by a journalist about this astronomical event.

1. Can you please define “super moon” “blood moon” and “blue” moon as they occur individually?

—> Supermoon: this is a term that many astronomers (me included) don’t like, as it was introduced by an astrologer (not an astronomer) but it is now very popular. It is just the moment the full moon is happening near the perigee (the Moon in its closest point to Earth). But, that is the important thing, the difference in size of a “supermoon” with respect an average moon is that a supermoon is ~5-6% larger than the average moon. That is almost nothing!!! Many people are confused with the “14% difference” between the supermoon and the micromoon (when the moon is near the apogee, the farthest point to the Earth).

I insist: it is VERY difficult for our naked eye to distinguish a supermoon from an “average” moon.

You can read a lot about this in the post I wrote two years ago and also in the second episode entitled “Blueberry Moon” of the new science podcast “The Skyentists” produced by Kirsten Banks and me.

—> Blood moon: If we astronomers don’t like the term “supermoon”, we really hate the name of “blood moon”. This is just a lunar eclipse!!

—> Blue moon: the now “standard” definition of a blue moon is when a second full moon is happening within the same calendar month. That is, it was full moon on Jan 2nd, the second full moon this month in Jan 31st is a blue moon.

HOWEVER, strictly talking THIS IS NOT TRUE FOR EASTERN AUSTRALIA (NSW, Tasmania, Victoria) and New Zealand, as the moment of the full moon is actually at 00:26am Feb 1st (Sydney/Melbourne time). It is true for Queensland (at 11:26pm Jan 31st), Alice Spring (at 10:56pm Jan 31st) and Perth (9:56pm Jan 31st).

In any case, the ONLY IMPORTANT real astronomical event is that this is a lunar eclipse (the rest is added to create some hype).

You can get plenty of information about the lunar eclipse in this webpage in timeanddate.com and also in this PDF file from NASA Lunar Eclipses.

All the important information for the lunar eclipse happening on the 31st Jan 2018. Credit: F. Espenak / NASA. Here the PDF file.

Australian astronomers have also written about this lunar eclipse. I recommend to have a look to this nice article published by Tanya Hill in The Conversation and also this article by Alan Duffy in Australia’s Science Channel

2. Is this the first time a super blue blood moon has occurred in 150 years?

Probably not, I don’t know, we actually don’t care about this much… It is just a lunar eclipse!!!!

3. How significant is this lunar event?

As I said, it is just a lunar eclipse. That is the point. The rest is added.

4. We are in north-west Victoria. What can people expect to see?

It does not matter where you are in Australia (or in the world, as long as it is night) to see this event. The only differences will be the local weather conditions… if the weather is good, you’ll see a very nice lunar eclipse. It is a perfect opportunity to enjoy the sky!!

5. Are there any tips to getting the best view of the eclipse, or what would be the best times to see it?

The best moment to see the eclipse is when the moon is completely covered by the Earth’s shadow. This happens between 11:52pm and 1:08pm, with the maximum eclipse at 12:30am. You’ll see a red-orange moon in the sky, pretty spectacular.

Addendum 31st Jan: I’ve been using the hashtag #itisjustalunareclipse in social media to say that, at the end… it is just a lunar eclipse!

References:

31 January 2018 — Total Lunar Eclipse in http://www.timeandate.com
PDF file with all info of the lunar eclipse from NASA Lunar Eclipses.
Supermoons, post published in this blog, 11 Nov 2016
A blue blood supermoon is coming, by Alan Duffy in Australia’s Science Channel, 24 Jan 2018
The next Full Moon brings a lunar eclipse, but is it a Super Blood Blue Moon as well? That depends…, Tanya Hill in The Conversation, 29 Jan 2018.
A beginner’s guide to the Moon, Ian Musgrave and Genelle Weule in ABC News, 31 Jan 2018.
The “Trifecta” Lunar Eclipse on January 31st, great article by Kelly Beatty in Sky & Telescope, 29 Jan 2018.

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Crescent Moon and AAT

Crescent Moon and the Anglo-Australian Telescope

The Anglo-Australian Telescope (AAT, Siding Spring Observatory, NSW, Australia) is ready for another night observing with the SAMI instrument. A crescent Moon is seen towards the west through the opening of the dome.

Photo taken using a CANON EOS 5D Mark III, 0.6 seconds integration, 70mm lens at f2.8, 400 ISO, Thursday 2nd March 2017, 8pm AEST.

More sizes, including highest resolution image, in my Flickr.

Credit: Ángel R. López-Sánchez (AAO/MQU).

Image

Almost full moon and Sydney Tower

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A 97.8% illuminated moon rises over Sydney on Sunday 13th November 2016. I checked for a nice spot to get the photo of this almost full moon (with a supermoon happening tomorrow) crossing behind the famous Sydney Tower.

The image was taken at 7:15pm Sydney time (8:15 UTC) using my CANON EOS 5D Mark III with a 70-200 mm lens at 200mm, f4.5, 100 ISO and 1/800 seconds. The Moon was at a distance of 355 806 km and had an apparent size of 33.6 arcmin. It was only 17 degrees over the horizon.

More info and high resolution images:

https://www.flickr.com/photos/angelrls/30651527540/

Credit: Ángel R. López-Sánchez (AAO/MQU)