#4121

[gr8writingtips]

writing tip #4121:

not sure where to start? how about in your living room? maybe a home office? garden? anywhere you can bring your laptop really

[max-the-many]

Looking out for somebody for a testrun...

[monkeyssalad-blog]

1942 Cessna UC-78C (T-50) Bobcat N88878 272125 C/N 4121 USAAF 42-72125 by Chris Murkin Via Flickr: 1942 Cessna UC-78C (T-50) Bobcat N88878 272125 C/N 4121 USAAF 42-72125 Photo taken at EAA Airventure Wittman Regional Airport Oshkosh Wisconsin USA July 2024 DAF_6295

[harveyphotography]

Ci sono luoghi che non fanno rumore, ma riescono comunque a lasciarsi qualcosa dentro. Port Grimaud è uno di quelli.

[chris-tarrant-official]

Question 242

A

B

C

D

Voting ended onOct 29, 2024

[space--bot]

A window into the cosmic past

This image from the NASA/ESA Hubble Space Telescope shows the galaxy cluster PLCK G004.5-19.5. It was discovered by the ESA Planck satellite through the Sunyaev-Zel’dovich effect — the distortion of the cosmic microwave background radiation in the direction of the galaxy cluster, by high energy electrons in the intracluster gas. The large galaxy at the centre is the brightest galaxy in the cluster and the dominant object in this image, and above it a thin, curved gravitational lens arc is visible. This is caused by the gravitational forces of the cluster bending the light from stars and galaxies behind it, in a similar way to how a glass lens bends light.

Several stars are visible in front of the cluster — recognisable by their diffraction spikes — but aside from these, all other visible objects are distant galaxies. Their light has become redshifted by the expansion of space, making them appear redder than they actually are. By measuring the amount of redshift, we know that it took more than 5 billion years for the light from this galaxy cluster to reach us. The light of the galaxies in the background had to travel for even longer than that, making this image an extremely old window into the far reaches of the Universe.

This image was taken by Hubble’s Advanced Camera for Surveys (ACS) and Wide-Field Camera 3 (WFC3) as part of an observing programme called RELICS (Reionization Lensing Cluster Survey). RELICS imaged 41 massive galaxy clusters with the aim of finding the brightest distant galaxies for the forthcoming NASA/ESA/CSA James Webb Space Telescope (JWST) to study.

Acknowledgement: D. Coe et al.

https://www.spacetelescope.org/images/potw

[changedandfullofnothing]

Do you ever think "what if this certain person dies" and then get scared because there are things you still want to tell them or hear them say. Anyway please don't die.

[our-eyes-see]

BNSF #4121 Fullerton, CA 12/29/16 7:36pm