Samantha Mathewson

Mars and the moon will make a close approach to each other in the sky tonight (Sept. 16), and here's what you can expect to see.

An intermediate spiral galaxy called NGC 1961 was photographed by NASA’s Hubble Space Telescope, revealing gorgeous spiral arms and glittering, blue regions of bright young stars.

Using data from NASA's Chandra X-ray Observatory, Hubble Space Telescope and recently retired Spitzer Space telescope, astronomers traced the timeline of a supernova explosion called SNR 0519.

A new photo from the Hubble Space Telescope captures two distant "overlapping" spiral galaxies.

The waxing gibbous moon will pass near Saturn on Sept. 7 and 8. Meanwhile, the moon reaches perigee or its closest point along its orbit to the Earth.

Mars appears closest to the bright star Aldebaran of the Taurus constellation Tuesday (Sept. 6). The pair will be visible high in the south before sunrise.

A new photo from the Hubble Space Telescope captures a dwarf irregular galaxy called NGC 1156, which boasts a unique structure unlike most other galaxies.

See the moon shine near the claws of the Scorpius constellation just after dusk tonight (Sept. 2).

The Summer Triangle asterism consists of three bright, white stars: Vega, Altair and Deneb. Starting just after dusk, these three stars will be visible high overhead all night.

See the young moon over Mercury in the evening sky just after sunset tonight (Aug. 29).

A close encounter, or conjunction, between August's waning crescent moon and Venus occurs tonight when the two objects share the same right ascension.

Uranus will reverse its eastward movement Wednesday (Aug. 24) and begin its westward path across the night sky.

A new image from the Hubble Space Telescope captures a star-studded cluster in the constellation Sagittarius.

The most massive known star in the universe has been photographed in the greatest detail to date and it might be smaller than astronomers previously thought.

Watch the moon as it appears to "hop" over Uranus in the afternoon sky tomorrow (Aug. 18).

A mesmerizing new photo captures bright, golden swirling clouds of gas that generate an exceptionally high rate of star formation.

The Perseid meteor shower reaches its peak overnight on Aug. 12 and 13, unfortunately coinciding with this month’s full Sturgeon Moon.

The annual Perseid meteor shower is approaching its peak, and you can enjoy the event live online.

The peak of the annual Perseid meteor shower shares the sky with August's full moon this week, meaning it will be difficult to view the iconic shooting stars.

The Perseid meteor shower, one of the most anticipated and popular night-sky shows of the year, is likely to be upstaged by August’s full moon.

The Hubble Space Telescope is seeing double in a new image of a distant galaxy called SGAS J143845+145407.

Multiple galaxies shine bright against the dark backdrop of space in a newly released Hubble Space Telescope image.

The NASA/ESA Hubble Space Telescope captured a sparkling new view of a globular cluster called Terzan 2, located in the constellation Scorpio.

An unusual galaxy merger boasts multiple interwoven arms in a newly released Hubble Space Telescope image.

The Orion Nebula's bluish gas shell appears to be leaking dust and gas from a protrusion discovered by NASA's flying telescope SOFIA.