Watch "23 April 2021" on YouTube
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We will begain about aliens

the Event Horizon of a black hole is a name we give to the region of spacetime beyond which anything that drops into it can never come back out. Not even light itself. This is contrasted by a white hole, which literally pushes you away by spitting material at you.
From NASA space channal

Pls add people's

There's No Place Like Home
http://www.nasa.gov/image-feature/theres-no-place-like-home-0

​Sunset at Gobabeb, Namibia.

Squids and Other Research Heading to the Station. Yes, Squids!
http://www.nasa.gov/image-feature/squids-and-other-research-heading-to-the-station-yes-squids

In just over a week, these tiny squids will head to space along with many other scientific experiments aboard SpaceX’s 22nd cargo resupply mission to the station.

Phobos is the innermost and largerof the two natural satellites of mars, the other being deimos.
Both moons discoverd in 1877
by american astronomy Asaph Hall.......
From NASA and science tecnology.

The first NASA shuttle mission STS-1 on april 12,1981

Watch "Phobos Mars Moon!" on YouTube
https://youtu.be/3bbyHfBgwrE

Surface and moons of mars.
In 18 july 2018 from NASA and science channal.

Galaxy surface from NASA AND SCIENCE CHANNAL

there are six dwarf planets officially designated by the IAU: Pluto, Ceres, Eris, Makemake, Haumea, and 2015 RR245, discovered in July. Since scientists started looking deeper into the Kuiper belt, they have found at least 20 more similarly sized objects, Sheppard said.

A dwarf planet is a planetary mass object that does not dominate its religion of space.

Betelgeuse is usually the tenth brightest star in the night sky.
The second brightest in the constellation of orion.
Radius:- 617.1 million km (887 R☀️)
Distance to earth:- 642.5 light year
Surface temprature:- 3,500 K
Mass:- 2.188×10^31 kg (11M)
From NASA AND SCIENCE TECNOLOGY

Betelgeuse is usually the tenth-brightest star in the night sky and, after Rigel, the second-brightest in the constellation of Orion. It is a distinctly reddish semiregular variable star whose apparent magnitude, varying between +0.0 and +1.6, has the widest range displayed by any first-magnitude star. Wikipedia
Radius: 617.1 million km (887 R☉)
Surface temperature: 3,500 K
Distance to Earth: 642.5 light years
Mass: 2.188 × 10^31 kg (11 M☉)

Watch "Less Than Five - What is a Supernova?" on YouTube
https://youtu.be/YIKXvDlf8_0