Новости из категории: astronet

Geostationary Highway through Orion

Пн, Январь 16, 2017 - 8:30

Put a satellite in a circular orbit about 42,000 kilometers from the center of the Earth and it will orbit once in 24 hours. Because that matches Earth's rotation period, it is known as a geosynchronous orbit.

The Matter of the Bullet Cluster

Вс, Январь 15, 2017 - 7:30

What's the matter with the Bullet Cluster? This massive cluster of galaxies (1E 0657-558) creates gravitational lens distortions of background galaxies in a way that has been interpreted as strong evidence for the leading theory: that

Stardust in the Perseus Molecular cloud

Сб, Январь 14, 2017 - 8:30

Clouds of stardust drift through this deep skyscape. The cosmic scene spans nearly 2 degrees across the Perseus molecular cloud some 850 light-years away. A triangle of dusty nebulae reflecting light from embedded stars is captured in the..

Астрономическая неделя с 16 по 22 января 2017 года

Пт, Январь 13, 2017 - 19:32

На данной неделе долгопериодическая переменная звезда RS Скорпиона достигнет максимума блеска (6m), 17 января будет иметь место..

When Mars met Neptune

Пт, Январь 13, 2017 - 7:30

On January 1, a Mars-assisted viewing opportunity allowed binocular-equipped skygazers to cross an ice giant off their life list. Remarkably, the line-of-sight to the bright Red Planet could guide you to within 0.02 degrees of a faint,

Edge On NGC 891

Чт, Январь 12, 2017 - 8:30

Large spiral galaxy NGC 891 spans about 100 thousand light-years and is seen almost exactly edge-on from our perspective. In fact, about 30 million light-years distant in the constellation Andromeda, NGC 891 looks a lot like our Milky Way.

Mimas, Crater, and Mountain

Ср, Январь 11, 2017 - 7:30

Mimas is an icy, crater-pocked moon of Saturn a mere 400 kilometers (250 miles) in diameter. Its largest crater Herschel is nearly 140 kilometers wide. About a third the diameter of Mimas itself, Herschel crater gives the small moon an..

Sentinels of a Northern Sky

Вт, Январь 10, 2017 - 8:30

Who guards the north? The featured picture was taken last March in Finnish Lapland where weather can include sub-freezing temperatures and driving snow. Surreal landscapes sometimes result, where white alien-looking sentinels seem..

In the Center of Spiral Galaxy NGC 5033

Пн, Январь 09, 2017 - 7:30

What's happening in the center of spiral NGC 5033? Many things -- some circular, some energetic, and some not well understood. NGC 5033 is known as a Seyfert galaxy because of the great activity seen in its nucleus.

IC 4406: A Seemingly Square Nebula

Вс, Январь 08, 2017 - 8:30

How can a round star make a square nebula? This conundrum comes to light when studying planetary nebulae like IC 4406. Evidence indicates that IC 4406 is likely a hollow cylinder, with its square appearance the result of our..

Календарь наблюдателя на февраль 2017 года

Сб, Январь 07, 2017 - 14:27

Очередной выпуск ежемесячника, освещающего астрономические явления и небесные тела, доступные для наблюдений невооруженным глазом..

Sharpless 249 and the Jellyfish Nebula

Сб, Январь 07, 2017 - 8:30

Normally faint and elusive, the Jellyfish Nebula is caught in this alluring telescopic mosaic. The scene is anchored below by bright star Eta Geminorum, at the foot of the celestial twin, while the Jellyfish Nebula is the brighter arcing