Caption
NASA’s James Webb Space Telescope’s NIRCam (Near-Infrared Camera) image of the galaxy cluster PLCK G165.7+67.0, also known as G165. A foreground cluster, located 3.6 billion light-years away from Earth, is magnifying and bending the light of the distant universe beyond. In this image, astronomers discovered the light of an exploding star — more specifically, a Type Ia supernova — imaged three times, seen as points of light within the prominent red arc at the right-center of the image.
To achieve three images, the light traveled along three different paths. Since each path had a different length, and light traveled at the same speed, the supernova was imaged in this Webb observation at three different times during its explosion. The multiply-imaged supernova offers astronomers a unique way to calculate a new value for the Hubble constant — the rate at which the universe is accelerating.
The field of G165 is known for a high rate of star formation of more than 300 solar masses per year, an attribute that correlates with higher supernova rates.
In this image, blue represents light at 0.9, 1.15, and 1.5 microns (F090W + F115W + F150W), green is 2.0 and 2.77 microns (F200W + F277W), and red is 3.56, 4.1, and 4.44 microns (F356W + F410M + F444W).
| About The Object | |
|---|---|
| Object Name | PLCK G165.7+67.0, G165, SN H0pe |
| Object Description | Galaxy cluster and supernova |
| R.A. Position | 11:27:15.59 |
| Dec. Position | +42:28:33.46 |
| Constellation | Ursa Major |
| Dimensions | Image is about 1.5 arcminutes across |
| About The Data | |
| Data Description | This image was created from JWST data from proposals: (R. Windhorst) and (B. Frye). Image processing: Alyssa Pagan (STScI). |
| Instrument | NIRCam |
| Exposure Dates | 30 March 2023, 22 April 2023, 09 May 2023 |
| Filters | F090W, F115W, F150W, F200W, F277W, F356W, F410M, F444W |
| About The Image | |
| Color Info | These images are a composite of separate exposures acquired by the James Webb Space Telescope using the NIRCam instrument. Several filters were used to sample wide infrared wavelength ranges. The color results from assigning different hues (colors) to each monochromatic (grayscale) image associated with an individual filter. In this case, the assigned colors are: Blue: F090W + F115W + F150W, Green: F200W + F277W, Red: F356W + F410M + F444W |
| About The Object | |
|---|---|
| Object Name | A name or catalog number that astronomers use to identify an astronomical object. |
| Object Description | The type of astronomical object. |
| R.A. Position | Right ascension – analogous to longitude – is one component of an object's position. |
| Dec. Position | Declination – analogous to latitude – is one component of an object's position. |
| Constellation | One of 88 recognized regions of the celestial sphere in which the object appears. |
| Distance | The physical distance from Earth to the astronomical object. Distances within our solar system are usually measured in Astronomical Units (AU). Distances between stars are usually measured in light-years. Interstellar distances can also be measured in parsecs. |
| Dimensions | The physical size of the object or the apparent angle it subtends on the sky. |
| About The Data | |
| Data Description |
|
| Instrument | The science instrument used to produce the data. |
| Exposure Dates | The date(s) that the telescope made its observations and the total exposure time. |
| Filters | The camera filters that were used in the science observations. |
| About The Image | |
| Color Info | A brief description of the methods used to convert telescope data into the color image being presented. |
| Compass and Scale Image | An astronomical image with a scale that shows how large an object is on the sky, a compass that shows how the object is oriented on the sky, and the filters with which the image was made. |
