Wikipedia:Reference desk/Archives/Science/2021 June 5

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June 5

Satellite map of Nyiragongo lava flows

https://en.wikipedia.org/wiki/File:UNOSAT_A3_Natural_Portrait_VO20210523COD_Geological_Information_MountNyiragongo_DRCongo_28May2021_v1.pdf

If satellites were used to map the flows, why weren't satellite images of the flows themselves used instead of being represented by orange striping? ZFT (talk) 06:22, 5 June 2021 (UTC)

To make them clearly visible. This is quite common with satellite images. See False color image.--Shantavira|^{feed me} 06:43, 5 June 2021 (UTC)

Understanding blue

Blue appears to have the dullest appearance of all fully saturated colors. Why?? Georgia guy (talk) 14:49, 5 June 2021 (UTC)

There is a pretty good description of the factors involved in the color vision article. Mike Turnbull (talk) 15:04, 5 June 2021 (UTC)

What kind of dandelion is this?

Before I mowed a section of my yard that I had not had time to get to, there were what appeared to be dandelions, except instead of the ones I have seen elsewhere in the yard, which had the flower and the seedhead shown in the Taraxacum infobox, some of these had smaller flowers which were more green than orange and others had a seedhead the size of a marble rather than a ping pong ball. Sorry, I don't have a camera.— Vchimpanzee • talk • contributions • 15:41, 5 June 2021 (UTC)

Where in the world? Alansplodge (talk) 22:33, 5 June 2021 (UTC)

I'm in North Carolina.— Vchimpanzee • talk • contributions • 17:38, 6 June 2021 (UTC)

Coltsfoot, maybe? nagualdesign 18:02, 6 June 2021 (UTC)

A few of the Google photos for that look like it, but none that show the seedhead.— Vchimpanzee • talk • contributions • 18:08, 6 June 2021 (UTC)

This page shows some with their "hairy parachutes".  --Lambiam 21:53, 6 June 2021 (UTC)

If that's a euphemism it's not one that I've heard before, but I'll definitely be using it at some point. nagualdesign 00:13, 7 June 2021 (UTC)

Possibly it is a Hieracium species. There are a lot of them. Graeme Bartlett (talk) 13:01, 7 June 2021 (UTC)

That could be it.— Vchimpanzee • talk • contributions • 20:14, 7 June 2021 (UTC)

• Could be any number of False dandelion species. There are dozens. --Jayron32 15:11, 7 June 2021 (UTC)