Tag Archives: Oort Cloud

Mesmerizing Map Of The ‘Near’ Solar System By Biologist Eleanor Lutz.

by Anura Guruge


Click to access original article in ‘Visual Capitalist’.


I saw this on my Google News feed and had to share it with you.

Brilliant. Mesmerizing. Kudos. Bravo. THANK YOU.

Definite leap forward from the older map provided by NASA.


I do NOT in any way want to be churlish but given my passion for dwarf planets and comets I have to contend that this does NOT go far enough. It stops at the Kuiper Belt. The Solar System goes much, much further.

There is the ‘Scattered Disc’ for the start and the ‘Oort Cloud‘. See diagram below. But, this map is still BRILLIANT. I love it.


Related posts:
Check Category ‘Astronomy.


by Anura Guruge

This Latest Interstellar Comet, 2I/Borisov, Is By NO Means The Only Comet To Spew Cyanide Gas. Quite Common!

by Anura Guruge


From ‘Google News’. It was BIG in … astronomy news.


Click to ENLARGE. From my ‘Comets 101’ book. Link below.


Yes, everybody is trying to cash in on this Interstellar Comet — supposedly the second we have discovered (albeit, both in the last 2-years). When I saw the headlines about cyanide it made me smile. I knew that cyanide was not uncommon in comets.

Recall Halley’s comet that comes around every 75-76 years. In the early 20th century there was a scare that folks would die from the cyanide that was emanating from its tail. Well nobody did.

So, please don’t get excited about this cyanide. It will NOT kill you or anybody else.


Has a ton of good information about comets.

Related Posts:
Check Categories ‘Events’ &  ‘Astronomy’.


by Anura Guruge

TWO ‘Interstellar Comets’ In Less Than 2-Years — And We Have Never Seen ANY Before?

by Anura Guruge


Click to ENLARGE and study. See image below for origin — viz. JPL Small Body Database Browser.


Click to ENLARGE and study. JPL Small-Ball Database Browser.


Click to access ‘spaceweather.com’ and read the original.


Click to access my 2017 post.


I will grant that this new comet, C/2019 Q4 (Borisov), does have more of an intriguing orbital path than did C/2017 U1.

But, I am not willing to RUSH to the conclusion that it is interstellar — i.e., it did NOT originate in our own Oort cloud. Still very early days. That it is travelling too fast to be bound to the Sun is interesting.

I was not convinced about A/2017 U1 (ʻOumuamua) being interstellar and now others are joining in. SMILE. I do know some about comets.

All I am saying, for now, is don’t rush to a conclusion. Let’s study this puppy a bit more.

Definitely not going to be GREAT comet. It will be very far from the Sun. Twice as far as the Earth is to the Sun. So, unlikely that it will be very bright or sport a spectacular tail.

Just wanted to keep YOU in the loop. But, stay tuned.


Has a ton of good information about comets.

Related Posts:
Check Categories ‘Events’ &  ‘Astronomy’.


by Anura Guruge

ANOTHER Naked Eye Visible Comet Ahead Of Christmas 2018? C/2018 V1 (Machholz-Fujikawa-Iwamoto).

by Anura Guruge


Click to ENLARGE.


Comet C/2018 V1 ( Machholz-Fujikawa-Iwamoto )

Discovered: November 7, 2018 (yes, just last week).

Discoverers: One is Arizona (Donald E. Machholz, Jr.) & two in Japan (Shigehisa Fujikawa & Masayuki Iwamoto). You can find more here. Hence the name which credits all three.


C/2018 V1 is much more of a CLASSIC comet than our current ‘Christmas Comet of 2018‘, i.e., 46P/Wirtanen. That is why it has a ‘C/’ designation while the other is a ‘P/’. The ‘P/’ denotes that 46P/Wirtanen is a PERIODIC comet — one that swings around the sun on a regular basis (like a commuter). The ‘C/’, on the other hand, means that is a NON-PERIODIC. It means that this comet has not been previously seen in the last 200-years. Typically it means that it is a FIRST TIME visitor from far, far out in the Solar System, ideally from the Oort Cloud, the incubator of most comets at the very edge of our Solar System.

So, we are assuming it is a FRESH comet, with a lot of frozen matter that will sublimate as the comet gets closer and closer to the Sun. That is what makes it visible, gives it a tail and with luck makes it spectacular. Right now it is touch and go. Viewed through a powerful telescope you can already see a blue tail — that color indicating the presence of ionized Carbon Monoxide (CO+).

On Tuesday, November 27, 2018 it will be at its closest to Earth — 62 million miles. Comet ISON (C/2012 S1) that could have been the GREAT COMET of 2013 would have been 40 million miles. So, C/2018 V1 will be 22 million miles further out. BUT, unlike ISON it will make it around the Sun. That is a given. It is NOT a sungrazer. Actually it doesn’t get very close to the Sun! As you can see from the above diagram it does not even cross Mercury’s orbit.

Right now it is BORDERLINE — but shows more promise than 46P.

I will keep you posted. This was a BIG heads up.


Comet ISON IF it had rounded the Sun — rather than getting FRIED by it, because it went so close.



46P/Wirtanen


Click to ENLARGE and admire. From the JPL Small-Body Database Browser.


Related posts:
Check Category ‘astronomy’.


by Anura Guruge

Robert Irion’s July 2013 Article In ‘National Geographic’ Rather Lax With The Facts!

Anura Guruge, June 8, 2013.

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by
Anura Guruge


Related Post:
>> The June ‘National Geographic’‘Maxed Out Mount Everest’ … — May 25, 2013.


IrionarticleJuly 2013


I am, and have been for decades, a great fan of ‘National Geographic’. It is one of the few magazines that we continue to subscribe and do so without fail.

I dived into the July 2013 cover story about the ‘Solar System’ as this is very germane to the work I have been doing on 4 Vesta and Comet ISON (C/2012 S1).

There is at least one huge howler that tungsten and titanium nitride could only have been created by the Sun. WRONG.

So, for the first time in my life I wrote a letter to the Nat. G. Editors.

Check it out:

Click to ENLARGE and read.

Click to ENLARGE and read.