Nikolai Novik

[Взаимная подписка с адекватными @since1795]

Над Тибетом засняли красных призраков (или красные спрайты) — чрезвычайно редкое и впечатляющее природное явление, которое выглядит как ярко-красные молнии. Но в отличие от обычных молний, которые бьют вниз из грозовых облаков, красные спрайты возникают очень высоко над грозовыми

[Black Hole @konstructivizm]

What will the Artemis-2 astronauts do during the entire 10-day mission?

Day by day overview:

Day 1. Launch.
Launch on the SLS rocket, stage separation, orbital insertion. Maneuvers around the spent stage, initial system checks, change from spacesuits to everyday clothing.

Day 2. Beginning the journey to the Moon:
Simulator exercises, then the main maneuver—translunar injection (TLI), which places Orion on a trajectory to fly around the Moon and return to Earth.

Day 3. Preparation
Rehearsals for lunar observations in zero gravity, corrective maneuver, emergency procedures training (e.g., CPR).

Day 4. Course correction
Second minor maneuver, communication with Mission Control, media sessions, photography of Earth and the Moon at the midpoint.

Day 5. Lunar Entry
For the first time since 1972, humans will be in cislunar space. Spacesuit tests: rapid pressurization, life support systems checks. Another course correction.

Day 6. Lunar Flyby
The main day: The Orion spacecraft will fly at an altitude of 6,400–9,650 km above the lunar surface.

This distance is approximately 15–24 times greater than the orbital altitude of the ISS. Plus, the Moon itself is smaller. Visually, the Moon will look like a basketball at arm's length to the astronauts. There will be only three hours for observations during closest approach. The astronauts will take photographs and record geological data. Depending on the launch time, the Artemis 2 crew could break the record for the longest distance from Earth.

Day 7. Lunar Exit
Data transfer to scientists, psychological and physical debriefings. Symbolic call with the ISS crew. First maneuver of the return trajectory.

Day 8. Demonstrations
Radiation protection training (using water and thermal protection as barriers). Testing the Orion attitude control systems in various modes.

Day 9. Preparing for reentry
The last full day of the flight. Technological demonstrations, course corrections, fitting of compression suits to help the body adapt to weightlessness.

Day 10. Return
Final maneuver, atmospheric reentry, during which the temperature will reach 1650°C. Parachute deployment, splashdown in the Pacific Ocean off San Francisco. Crew pickup by US Navy ships.

[Black Hole @konstructivizm]

ARTEMIS II MISSION TRAJECTORY

380,000 kilometers of empty space. Four astronauts. One spacecraft. And the courage to go where humanity hasn't ventured in half a century.

Artemis II — the journey home to the Moon begins in 2026.

Credit Video: NASA/JSC/Kel Elkins (Science and Technology Corporation)
Ernie Wright (USRA) ORCID

[Black Hole @konstructivizm]

Olympus Mons on Mars is the tallest planetary mountain in the solar system.

[Взаимная подписка с адекватными @since1795]

НАСА составило карту всего океанского дна, используя гравитацию из космоса

НАСА совместно с CNES (Франция) опубликовало одну из самых детализированных карт океанического дна, используя данные спутника SWOT (Surface Water and Ocean Topography)

[Black Hole @konstructivizm]

How far away are our galactic neighbors?

1 light year = 9.5 trillion kilometers

[Eustace. Mangust Chehova. @Kamerto_n]

При переходе из двумерного пространства в трёхмерное, оно приобретает новые ранее невообразимые качества.
Так будет с каждым новым измерением, но для понимания этого необходимо адаптировать свой аналитический аппарат.
Ибо это всё уже существует.

[snr @idudarev]

Московский двор?
Нет. Это вид с поверхности кометы Чурюмова-Герасименко.

Да и природа снежинок иная. Это небольшие пылинки с поверхности кометы, а еще воздействие космических лучей на матрицу камеры и конечно - звёзды, которые перемещаются на фоне

[Nikolai Novik @Nikolai_Novik]

@serotonin_ride 👍

[Curiosity @CuriosityonX]

Tallest mountain in the solar system and Phobos, a moon of Mars.

[SpaceEngine sim]

[Black Hole @konstructivizm]

Behold the alien wilderness of Mars—right here, millions of kilometers from home! This is the raw, rust-colored surface of the Red Planet, a frozen desert sculpted by billions of years of cosmic violence and whispers of ancient water. Endless fields of fine iron-rich dust coat jagged rocks, pockmarked craters, and ghostly remnants of long-vanished rivers and lakes. Towering dunes and fractured ancient highlands stretch toward a butterscotch sky under a thin, CO₂-choked atmosphere that offers almost no protection from brutal cold (-60°C average) and relentless solar & cosmic radiation.Yet we're not just staring from afar—we're there. Robotic pioneers like Perseverance, Curiosity, and their predecessors roll across this hostile terrain, drilling into rocks, sniffing for organic molecules, mapping dried-up river deltas, and hunting for the chemical fingerprints of past habitability. Was there once flowing water? Microbial life? A warmer, wetter Mars that could have cradled biology?Every single pixel beamed back to Earth is a mind-blowing testament to human ingenuity: we’ve built machines tough enough to survive launch, entry, descent, landing, and years of dust storms… all while controlling them from 225 million km away in real time. We're literally exploring another world without ever leaving our armchairs.This isn't science fiction anymore—it's today's reality. Mars is no longer just a distant dot in the sky; it's a place we've touched, studied, and begun to understand.The adventure is only accelerating.
NASA

[Black Hole @konstructivizm]

Space debris in Earth orbit

☄️ BLACK HOLE. Subscribe.

[Black Hole @konstructivizm]

Mars...
NASA

[NASA JPL @NASAJPL]

40 years ago, Voyager 2 made its closest approach to Uranus.

Over its months-long encounter, the spacecraft returned more than 7,000 photographs of Uranus, revealing 11 new moons, two new rings orbiting the planet, and a wealth of information for scientists to analyze for years to come. To this day, it is the first and only spacecraft to study Uranus up close!

[Black Hole @konstructivizm]

Zoomed-In Solar Flares at 179 Million °F with Real NASA Sound

[ботаник @fgt144]

Озеро Уюни в Боливии является крупнейшим высохшим солончаком мира. Его поверхность настолько ровная, что оно часто используется для калибровки и тестирования приборов дистанционного зондирования на спутниках благодаря своей огромной плоской поверхности и отражающей способности.

[Night Sky Now @NightSkyNow]

No CGI, no movie magic—just the surface of Mars in high definition.
It is absolutely wild that we have eyes here.

140 million miles away from everyone you know!

[ботаник @fgt144]

Голубое чудо Антарктики, река Оникс.
Технически Оникс не считается настоящей рекой. С точки зрения геологии, её правильно называть «поток талой воды». Всего на материке девять полупостоянных талых потоков. Оникс — самый крупный из них.

[Black Hole @konstructivizm]

Mars Perseverance Sol 181: Right Mastcam-Z Camera

[All day Astronomy @forallcurious]

🚨: This isn’t a desert on Earth. This is Mars.

225 million miles away. 🔴