Astronomy

Here, we study of astronomy from a Christian perspective.

NGC 7635: The Bubble Nebula Expanding

It's the bubble versus the cloud. NGC 7635, the Bubble Nebula, is being pushed out by the stellar wind of massive star BD+602522, visible in blue tow

Venus and the Triply Ultraviolet Sun

An unusual type of solar eclipse occurred in 2012. Usually it is the Earth's Moon that eclipses the Sun. That year, most unusually, the planet Venu

Earthshadow and the Beehive

The Earth's dark umbral shadow is shaped like a cone extending into space. Of course its circular cross section at the distance of the Moon is more e

The Spider and The Fly

Will the spider ever catch the fly? Not if both are large emission nebulas toward the constellation of the Charioteer (Auriga). The spider-shaped ga

Laguna Starry Sky

Staring toward the heavens, one of the many lagunas in the Atacama Desert salt flat calmly reflects a starry night sky near San Pedro de Atacama, Chi

The Tadpoles of IC 410

This telescopic close-up shows off the otherwise faint emission nebula IC 410. It also features two remarkable inhabitants of the cosmic pond of ga

Ribbons and Pearls of Spiral Galaxy NGC 1398

Why do some spiral galaxies have a ring around the center? Spiral galaxy NGC 1398 not only has a ring of pearly stars, gas and dust around its cent

An Immersive Visualization of the Galactic Center

What if you could look out from the center of our Galaxy -- what might you see? Two scientifically-determined possibilities are shown in the featur

The Upper Michigan Blizzard of 1938

Yes, but can your blizzard do this? In Upper Michigan's Storm of the Century in 1938, some snow drifts reached the level of utility poles. Near

Old Moon in the New Moon's Arms

Also known as the Moon's \ashen glow\ or the \Old Moon in the New Moon's arms\
Image Credit: Yuri Beletsky

Clouds in the LMC

An alluring sight in southern skies, the Large Magellanic Cloud (LMC) is seen in this deep and detailed telescopic mosaic. Recorded with broadband

Blue Comet in the Hyades

Stars of the Hyades cluster are scattered through this mosaic spanning over 5 degrees on the sky toward the constellation Taurus. Presently cruising

In the Valley of Orion

This exciting and unfamiliar view of the Orion Nebula is a visualization based on astronomical data and movie rendering techniques. Up close and pers

An Elephant's Trunk in Cepheus

With image data from telescopes large and small, this close-up features the dusty Elephant's Trunk Nebula. It winds through the emission nebula

Three Galaxies and a Comet

Diffuse starlight and dark nebulae along the southern Milky Way arc over the horizon and sprawl diagonally through this gorgeous nightscape. The br

Blue Comet PanSTARRS

Discovered with the PanSTARRS telescope on September 7, 2016, this Comet PanSTARRS, C/2016 R2, is presently about 24 light minutes (3 AU) from the

RCW 114: A Dragon's Heart in Ara

Large and dramatically shaped, this cosmic cloud spans nearly 7 degrees or 14 full moons across planet Earth's sky toward the southern constell

Bright Planetary Nebula NGC 7027 from Hubble

It is one of the brightest planetary nebulae on the sky -- what should it be named? First discovered in 1878, nebula NGC 7027 can be seen toward th

Clouds of Andromeda

What are those red clouds surrounding the Andromeda galaxy? This galaxy, M31, is often imaged by planet Earth-based astronomers. As the nearest lar

Carina over Lake Ballard

The Great Carina Nebula, also known as NGC 3372, is a jewel of the southern sky. Easily visible to the unaided eye it stands high above the signatu

M1: The Incredible Expanding Crab

The Crab Nebula is cataloged as M1, the first on Charles Messier's famous list of things which are not comets. In fact, the Crab is now known t

Unexpected X-Rays from Perseus Galaxy Cluster

Why does the Perseus galaxy cluster shine so strangely in one specific color of X-rays? No one is sure, but a much-debated hypothesis holds that thes

To Fly Free in Space

What would it be like to fly free in space? At about 100 meters from the cargo bay of the space shuttle Challenger, Bruce McCandless II was living

The Horsehead Nebula

One of the most identifiable nebulae in the sky, the Horsehead Nebula in Orion, is part of a large, dark, molecular cloud. Also known as Barnard 33

Grand Spiral Galaxy NGC 1232

Galaxies are fascinating not only for what is visible, but for what is invisible. Grand spiral galaxy NGC 1232, captured in detail by one of the Ve

Fireball in the Arctic

Something very bright suddenly lit up the arctic -- what was it? The original idea was to take a series of aurora images that could be made into a

Alpine Superga Moonset

December's Full Moon phase occurred near perigee, the closest point in its orbit around our fair planet. Big and bright, the fully illuminated lunar

HH 666: Carina Dust Pillar with Jet

To some, it may look like a beehive harboring an evil bee. In reality, the featured Hubble image captures a cosmic pillar of dust, two-light years lo

Messier Craters in Stereo

Many bright nebulae and star clusters in planet Earth's sky are associated with the name of astronomer Charles Messier, from his famous 18th century

Alnitak, Alnilam, Mintaka

Alnitak, Alnilam, and Mintaka, are the bright bluish stars from east to west (lower right to upper left) along the diagonal in this cosmic vista. O

'Oumuamua: Interstellar Asteroid

Nothing like it has ever been seen before. The unusual space rock 'Oumuamua is so intriguing mainly because it is the first asteroid ever detec

Two Black Holes Dancing in 3C 75

What's happening at the center of active galaxy 3C 75? The two bright sources at the center of this composite x-ray (blue)/ radio (pink) image

Lynds Dark Nebula 183

Beverly Lynds Dark Nebula 183 lies a mere 325 light-years away, drifting high above the plane of our Milky Way Galaxy. Obscuring the starlight behi

NGC 1365: Majestic Island Universe

Barred spiral galaxy NGC 1365 is truly a majestic island universe some 200,000 light-years across. Located a mere 60 million light-years away towar

Star Cluster NGC 362 from Hubble

If our Sun were near the center of NGC 362, the night sky would glow like a jewel box of bright stars. Hundreds of stars would glow brighter than S

Pluto's Bladed Terrain

Imaged during the New Horizons spacecraft flyby in July 2015, Pluto's bladed terrain is captured in this close-up of the distant world. The bizarre t

Two Comets and a Star Cluster

Two unusual spots are on the move near the famous Pleiades star cluster. Shifting only a small amount per night, these spots are actually comets in

A September Morning Sky

The Moon, three planets, and a bright star gathered near the ecliptic plane in the September 18 morning sky over Veszprem Castle, Hungary. In this tw

Europa and Jupiter from Voyager 1

What are those spots on Jupiter? Largest and furthest, just right of center, is the Great Red Spot -- a huge storm system that has been raging on J

A Waterspout in Florida

What's happening over the water? Pictured here is one of the better images yet recorded of a waterspout, a type of tornado that occurs over water.

Saturn in Blue and Gold

Why is Saturn partly blue? The featured picture of Saturn approximates what a human would see if hovering close to the giant ringed world. The imag

The Heart Nebula in Hydrogen, Oxygen, and Sulfur

What powers the Heart Nebula? The large emission nebula dubbed IC 1805 looks, in whole, like a heart. The nebula's glow -- as well as the shape

The Eagle and The Swan

The Eagle Nebula and the Swan Nebula span this broad starscape, a telescopic view toward the Sagittarius spiral arm and the center of our Milky Way

Milky Way over Chilean Volcanoes

Sometimes, the sky mimics the ground. Taken in 2017 May from the Atacama Desert in Chile, the foreground of the featured image encompasses the dipp

NGC 2442: Galaxy in Volans

Distorted galaxy NGC 2442 can be found in the southern constellation of the flying fish, (Piscis) Volans. Located about 50 million light-years away

Perseid by the Sea

Just after moonrise on August 12 this grain of cosmic sand fell by the sea, its momentary flash part of the annual Perseid Meteor Shower. To create t

Charon Flyover from New Horizons

What if you could fly over Pluto's moon Charon -- what might you see? The New Horizons spacecraft did just this in 2015 July as it zipped past Pluto

Detailed View of a Solar Eclipse Corona

Only in the fleeting darkness of a total solar eclipse is the light of the solar corona easily visible. Normally overwhelmed by the bright solar di

Gravity's Grin

Albert Einstein's general theory of relativity, published over 100 years ago, predicted the phenomenon of gravitational lensing. And that's

North North Temperate Zone Little Red Spot

On July 11, the Juno spacecraft once again swung near the turbulent Jovian cloud tops. On its seventh orbital closest approach this perijove passage

Pelican Nebula Close-up

The prominent ridge of emission featured in this vivid skyscape is designated IC 5067. Part of a larger emission region with a distinctive shape, p

The Dust Monster in IC 1396

Is there a monster in IC 1396? Known to some as the Elephant's Trunk Nebula, parts of gas and dust clouds of this region may appear to take on

Earth at Night

Can you find your favorite country or city? Surprisingly, on this world-wide nightscape, city lights make this task quite possible. Human-made ligh

The Summer Triangle over the Great Wall

Have you ever seen the Summer Triangle? The bright stars Vega, Deneb, and Altair form a large triangle on the sky that can be seen rising in the no

3D Lava Falls of Mars

Get out your red/cyan glasses and gaze across lava falls of Mars. The stereo anaglyph was created by combining two images recorded by the HiRISE ca

NGC 7814: The Little Sombrero in Pegasus

Point your telescope toward the high flying constellation Pegasus and you can find this expanse of Milky Way stars and distant galaxies. Dominated

Symbiotic R Aquarii

A long recognized naked-eye variable star, R Aquarii is actually an interacting binary star system, two stars that seem to have a close, symbiotic

The M81 Galaxy Group through the Integrated Flux ...

Distant galaxies and nearby nebulas highlight this deep image of the M81 Group of galaxies. First and foremost in this 80-exposure mosaic is the gr

Artistic Impression: The Surface of TRAPPIST-1f

If you could stand on the surface of the newly discovered Earth-sized exoplanet TRAPPIST-1f, what would you see? Presently, no Earthling knows for

The N44 Superbubble

What created this gigantic hole? The vast emission nebula N44 in our neighboring galaxy the Large Magellanic Cloud has a large, 250 light-year hole

Markarian's Chain to Messier 64

Top to bottom, this colorful and broad telescopic mosaic links Markarian's Chain of galaxies across the core of the Virgo Cluster to dusty spir

Solstice Conjunction over Budapest

Before a solstice Sun rose on June 21, brilliant Venus and an old crescent Moon posed together over Budapest, Hungary for this predawn skyscape. In

Northern Summer on Titan

While yesterday's solstice brought summer to planet Earth's northern hemisphere, a northern summer solstice arrived for ringed planet Saturn nearly a

A Sundial that Shows Solstice

What day is it? If the day -- and time -- are right, this sundial will tell you: SOLSTICE. Only then will our Sun be located just right for sunligh

The Massive Stars in Westerlund 1

Star cluster Westerlund 1 is home to some of the largest and most massive stars known. It is headlined by the star Westerlund 1-26, a red supergian

Views from Cassini at Saturn

What has the Cassini orbiter seen at Saturn? The featured music video shows some of the early highlights. In the first time-lapse sequence (00:07),

Saturn near Opposition

Saturn reached its 2017 opposition on June 16. Of course, opposition means opposite the Sun in Earth's sky and near opposition Saturn is up all

Manhattan Moonrise

A Full Moon rose as the Sun set on June 9, known to some as a Strawberry Moon. Close to the horizon and taking on the warm color of reflected sunligh

Red Sprites over the Channel

Mysterious and incredibly brief, red sprites are seen to occur high above large thunderstorms on planet Earth. While they have been recorded from l

Is the sun getting brighter?

Through internal nuclear reactions, hydrogen atoms inside the Sun are converted into helium atoms all the time. Over time, this causes a change in

Where do Leonids come from?

In mid-November each year, our Earth passes through the remains of the tail of Comet Tempel-Tuttle. These remains are a bunch of rocks floating in

Where do Perseids come from

Beginning in the late July and peaking around August 12th each year, the earth passes through the remains of the tail of a comet called Comet Swift

Nicolaus Copernicus Biography

His father died when Nicolaus was 10 years old. So he was taken care of by his uncle Lucas Waczenrode, a clergyman. At age 15, his un

What is a red-shift?

Here is a picture of the electromagnetic spectrum. Electromagnetic Spectrum

Light as a wave and as a particle

What is light? To be truthful, it's a mystery. We don't really know what it is. But, throughout the years, we learned some things about it.

Legacy of Tycho Brahe as an astronomer

Tycho Brahe was a nobleman from an important Danish family. During his university years, he was studying law. But his real passion was mathematics

How is the composition of a space object determine...

When an electron in an atom drops from one energy level to another, it gives off a specific amount of energy. It turns out that each element in the

What is the north star?

All the visible stars in the night sky change locations. They move from east to west with seasons. But one star appears to be in the

Number of satellites orbiting the earth

There are around 13,000 artificial satellites circling our planet. They are monitored by the U.S. government. As of early 2013, 1046

What is Dark Matter?

Dark matter is... dark, as in something you can't see, as in something we are clueless about. The idea of dark matter is not anyt

Organization of the cosmos

The stuff of the cosmos is organized in units we call galaxies. Galaxies consist of stars, planets, and nebulae. Dense concentrations of stars are

What's a Doppler Effect?

Doppler effect is stretching or compression of a wave as it moves. A good illustration would be to listen to a car zoom by you. As the car passes y

Electromagnetic Spectrum

The electronmagnetic spectrum is an array of light waves of different wavelengths. A wavelength is the distance between consecutive peaks of a wave

The Big Bang Theory: Current Dilemmas

This article explores the realistic challanges an early universe would experience if it tried exploding out of itself in the beginning.

When are the meteor showers?

When are the meteor showers, and what causes them