Wow - The Visible Star At The Center Of The Planetary Nebula Is An A-type Giant Star. It's The Companion

This striking image captures the interacting galaxy pair known as Arp-Madore 2339-661, so named because they belong to the Arp-Madore catalogue of peculiar galaxies. However, this particular peculiarity might be even odder than first meets the eye, as there are in fact three galaxies interacting here, not just two. 

The two clearly defined galaxies are NGC 7733 (smaller, lower right) and NGC 7734 (larger, upper left). The third galaxy is currently referred to as NGC 7733N, and can actually be spotted in this picture if you look carefully at the upper arm of NGC 7733, where there is a visually notable knot-like structure, glowing with a different colour to the arm and obscured by dark dust. 

Credit: ESA/Hubble & NASA

Reblog Vs. Repost

In short: reblogging is awesome. Reposting isn't.

Our Halloween event is Wednesday, Oct. 25 from 7:00-8:30pm, weather allowing! Check in the early afternoon that day to see if the weather will allow it to go on.

If not, we have a rain date planned for Thursday (and a 2nd rain date for Monday if neither work out).

July 2024 Public Nights

The observatory will be open to the public, weather allowing, on Wednesdays July 24 and 31 from 9:00 pm - 10:00 pm. Please check back the afternoon of the event for our weather decision!

Dusty regions like these are often the places where stars form. In fact, there are two notable stars—V633 (top left of center) and V376 Cassiopeiae (bottom left)—in this image from the Hubble Space Telescope.

These stars have yet to start fusing hydrogen in their cores, and continue to accumulate mass. As they do this, much of the material they ingest gets shot back out as energetic jets. For these young stars, these jets can contain as much mass as Earth has.

Credit: ESA/Hubble & NASA; Gilles Chapdelaine.

ALT TEXT: A protostar in the process of forming. Above the center, at 11 o’clock, is a bright, white star. To the bottom right of this star is a large cavity, surrounded by dark brown gas and dust. This surrounding dust fills the image with the exception of another small cavity toward the bottom left. At about 4 o’clock in this cavity, there is another bright, white star. Smaller white stars are spread throughout the image.

Every February 2, we wonder if Punxsutawney Phil will see his shadow.

In Saturn’s case, astronomers know some of Saturn’s moons will cast shadows across the planet’s iconic rings every 15 years. This effect only occurs when the planet’s rings are perpendicular to the Sun. The next time this will happen is in May 2025.

Watch as four of Saturn’s moons orbit the planet, based on images taken by the Hubble Space Telescope over a 9.5-hour span in 1995. Enceladus is first and Mimas is close behind. Both of these moons cast small shadows on Saturn, but among the two, only Enceladus’ shadow cuts across the rings. Dione follows next and casts a long shadow across the planet’s rings. About 12 seconds in, the moon Tethys moves swiftly behind the planet toward the right.

Credit: NASA/ESA/STScI.

Video of the Day!

Hubble has discovered that Jupiter’s red spot - a storm larger than Earth - is wobbling!

NASA Science

What is Dark Energy? Inside our accelerating, expanding Universe - NASA Science

Some 13.8 billion years ago, the universe began with a rapid expansion we call the big bang. After this initial expansion, which lasted a fr

Article of the Day!

"What is Dark Energy? Inside our accelerating, expanding Universe" by Chelsea Gohd

We're not yet sure about tonight's weather - it depends on whether these clouds move north or south. Check back in a few hours!

2023 October 18

Dust and the Western Veil Nebula Image Credit & Copyright: Jiang Wu

Explanation: It’s so big it is easy to miss. The entire Veil Nebula spans six times the diameter of the full moon, but is so dim you need binoculars to see it. The nebula was created about 15,000 years ago when a star in the constellation of the Swan (Cygnus) exploded. The spectacular explosion would have appeared brighter than even Venus for a week - but there is no known record of it. Pictured is the western edge of the still-expanding gas cloud. Notable gas filaments include the Witch’s Broom Nebula on the upper left near the bright foreground star 52 Cygni, and Fleming’s Triangular Wisp (formerly known as Pickering’s Triangle) running diagonally up the image middle. What is rarely imaged – but seen in the featured long exposure across many color bands – is the reflecting brown dust that runs vertically up the image left, dust likely created in the cool atmospheres of massive stars.

∞ Source: apod.nasa.gov/apod/ap231018.html