NASA Astronomy Picture of the Day

Jan 9 2023

Tails of Comet ZTF

Comet ZTF may become visible to the unaided eye. Discovered early last year, this massive snowball has been brightening as it approaches the Sun and the Earth. C/2022 E3 (ZTF) will be closest to the Sun later this week, at which time it may become visible even without binoculars to northern observers with a clear and dark sky. As they near the Sun, comet brightnesses are notoriously hard to predict, though. In the featured image taken last week in front of a picturesque star field, three blue ion tails extend to the upper right, likely the result of a variable solar wind on ions ejected by the icy comet nucleus. The comet's white dust tail is visible to the upper left and much shorter. The green glow is the comet's coma, caused by glowing carbon gas. Comet ZTF is expected to pass nearest the Earth in early February, after which it should dim dramatically.

https://apod.nasa.gov/apod/astropix.html

>>18109489

Nice

>>18109488

Wondering if it will be dropping off or picking up.

>>18109530

You asked for it

>>18109579

>>18109588

>Is Brazil our "mirror

They almost copied America's flag

Upon the proclamation of the Republic, one of the civilian leaders of the movement, the jurist Ruy Barbosa, proposed a design for the nation's new flag strongly inspired by the flag of the United States. It was flown from 15 to 19 November 1889, when marshal Deodoro da Fonseca (acting as provisional president of Brazil) vetoed the design, citing concerns that it looked too similar to the flag of another country.[4]

Fonseca suggested that the flag of the new republic should resemble the old imperial flag.[4] This was intended to underscore continuity of national unity during the transition from a constitutional monarchy to a republic.[4] Raimundo Teixeira Mendes presented a project in which the imperial coat of arms was replaced by a blue celestial globe and the positivist motto. It was presented to Fonseca, who promptly accepted. The flag was designed by a group formed by Raimundo Teixeira Mendes, Miguel Lemos, Manuel Pereira Reis and Décio Villares.[5] It was officially adopted on 19 November 1889.[6]

The flag has been modified on three occasions to add additional stars intended to reflect newly created states: 1960 (22 stars), 1968 (23 stars) and 1992 (27 stars). In contrast to many other national flags with elements representing political subdivisions, modifications to the flag of Brazil were not always made promptly upon political reorganisation, resulting in multi-year periods of history where there was a mismatch between the number of stars and the number of states and federal districts.[7] The most recent modification was made on 11 May 1992, with the addition of four stars to the celestial globe (representing states created between 1982 and 1991), and a slight change in the stars' positions was made to match the astronomical coordinates correctly.

https://en.wikipedia.org/wiki/Flag_of_Brazil