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Jason Nishiyama @evilscientistca@octodon.social

M42 - the Great Nebula in Orion is a large star formation region. It is fairly close, only about 1500 ly away.

The iron in iron meteorites was forged in the cores of massive stars. The meteorite itself is a remnant of the iron core from either a planetesimal or planet that formed in the early solar system that was then destroyed by a collision.

‪DUCK! M31 - the Andromeda Galaxy - is heading towards our own Galaxy and will collide with us in about 4 billion years. ‬


Now the reverse. Time lapse of yesterday's snowfall reversing the previous couple of days melt...

‪The lunar surface has more craters than the Earth because on Earth weather and geological processes erase craters in relatively short order. ‬


Globular clusters are balls of thousands to hundreds of thousands of generally older stars that orbit our Galaxy. We've also detected globular clusters orbiting other galaxies as well. Globular cluster M2 shown.

M51 or the Whirlpool galaxy is an interacting galaxy about 23 million light years from us.

‪Beautiful as they are planetary nebulae are quite ephemeral things lasting only 50-100 thousand years.‬

For those interested in the memory stick, here's the website of artist who created it: byblackbirddesigns.com/Collect

‪Bet the memory stick you back your observation data and writing to doesn't look this cool..‬


Many planetary nebula, such as M 2-9 shown here in this Hubble image, are bipolar, that is have two lobes to each side of the central star. We don't have a clear idea on why this happens. octodon.social/media/lnQC6wZJS

The difference telescope f ratio makes. Cluster M37, image on the left is a 12.7cm f12 telescope; on the right a 20 cm f3.9 telescope. Same imager and exposure for both. octodon.social/media/xy1n8AAYC octodon.social/media/oHfVLP6n_

The North America Nebula and the smaller Pelican Nebula (lower right) are actually part of the same large HII region. They appear separate because a dark nebula of dust and gas are between them and us, creating the shape of what we see as two individual nebulae. octodon.social/media/OLy3zEoSv

NGC 4361 is a planetary nebula in the constellation Corvus. A close examination shows some interesting structure in this PN that is classified as elliptical. octodon.social/media/AWFOUBYxm

M97 - The Owl Nebula is a planetary nebula located in the constellation Ursa Major. One of only a handful of PNe cataloged by Messier, it can be found beside the lower pointer star of the Big Dipper. octodon.social/media/q1KMIO56P

Hmmm getting 502 bad gateway errors when trying to upload pics here...

We classify stars based on their spectra. The sequence of spectral classes in essence tells us the temperature of the star. From hottest to coolest the classes are O, B, A, F, G, K, M.

Because of the distances involved the further we look into space, the farther back in time we are seeing. For every light-year away an object is, a year farther back in time is how we are seeing it. So an object 2000000 ly away we are seeing as it was 2000000 years ago.